diff --git a/transaction-validation-api/.gitignore b/transaction-validation-api/.gitignore
new file mode 100644
index 0000000..549e00a
--- /dev/null
+++ b/transaction-validation-api/.gitignore
@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
diff --git a/transaction-validation-api/.mvn/wrapper/maven-wrapper.jar b/transaction-validation-api/.mvn/wrapper/maven-wrapper.jar
new file mode 100644
index 0000000..cb28b0e
Binary files /dev/null and b/transaction-validation-api/.mvn/wrapper/maven-wrapper.jar differ
diff --git a/transaction-validation-api/.mvn/wrapper/maven-wrapper.properties b/transaction-validation-api/.mvn/wrapper/maven-wrapper.properties
new file mode 100644
index 0000000..e70e7bc
--- /dev/null
+++ b/transaction-validation-api/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar
diff --git a/transaction-validation-api/README.md b/transaction-validation-api/README.md
new file mode 100644
index 0000000..09f3212
--- /dev/null
+++ b/transaction-validation-api/README.md
@@ -0,0 +1,109 @@
+# Transaction Validation API
+
+Este proyecto es una API para la validación de transacciones financieras, desarrollada en Spring Boot. La API permite crear, obtener y buscar transacciones a través de varios endpoints.
+
+## Endpoints
+
+### Crear una transacción
+
+**URL:** `/api/transactions/create`
+
+**Método HTTP:** `POST`
+
+**Descripción:** Crea una nueva transacción en el sistema.
+
+**Request Body:**
+
+- `TransactionRequest` (JSON): Objeto que representa la transacción a ser creada.
+
+**Response:**
+
+- `200 OK`: Transacción creada exitosamente.
+- `Transaction` (JSON): Objeto de la transacción creada.
+
+**Ejemplo:**
+
+```json
+{
+    "id": 1,
+    "accountExternalIdDebit": "3fa85f64-5717-4562-b3fc-5a463f22afa6",
+    "accountExternalIdCredit": "3fa29f64-5717-4562-b3fc-2b963f11afa6",
+    "tranType": "Agente",
+    "value": 1299.0,
+    "status": "Pendiente",
+    "createdAt": "16-05-2024 22:58:14"
+}
+```
+
+### Obtener todas las transacciones
+
+**URL:** `/api/transactions`
+
+**Método HTTP:** `GET`
+
+**Descripción:** Obtiene una lista de todas las transacciones registradas en el sistema.
+
+**Response:**
+
+- `200 OK`: Lista de todas las transacciones.
+- `List<Transaction>` (JSON): Lista de objetos de transacciones.
+
+**Ejemplo de Respuesta:**
+
+```json
+[
+    {
+        "id": 1,
+        "accountExternalIdDebit": "3fa85f64-3267-1234-b3fc-5a463f22afa6",
+        "accountExternalIdCredit": "3fa29f64-4698-3623-b3fc-2b963f11afa6",
+        "tranType": "Agente",
+        "value": 399.0,
+        "status": "Aprobado",
+        "createdAt": "16-05-2024 23:06:32"
+    },
+    {
+        "id": 2,
+        "accountExternalIdDebit": "3fa85f64-3267-4562-b3fc-5a463f22afa6",
+        "accountExternalIdCredit": "3fa29f64-4698-4562-b3fc-2b963f11afa6",
+        "tranType": "Agente",
+        "value": 1299.0,
+        "status": "Rechazado",
+        "createdAt": "16-05-2024 23:06:44"
+    }
+]
+```
+
+### Buscar transacciones por ID externo de cuenta
+
+**URL:** `/api/transactions/search`
+
+**Método HTTP:** `GET`
+
+**Descripción:** Busca transacciones utilizando el ID externo de la cuenta.
+
+**Parámetro de URL:**
+
+- `accountExternalId` (UUID): ID externo de la cuenta para buscar transacciones.
+
+**Response:**
+
+- `200 OK`: Lista de transacciones asociadas con el ID externo de la cuenta.
+- `List<TransactionResponse>` (JSON): Lista de respuestas de transacciones.
+
+**Ejemplo de Respuesta:**
+
+```json
+[
+    {
+        "transactionExternalId": "3fa29f64-5717-4562-b3fc-2b963f11afa6",
+        "transactionType": {
+            "name": "Agente"
+        },
+        "transactionStatus": {
+            "name": "Pendiente"
+        },
+        "value": 1299.0,
+        "createdAt": "16-05-2024 22:58:14"
+    }
+]
+```
\ No newline at end of file
diff --git a/transaction-validation-api/docker-compose.yml b/transaction-validation-api/docker-compose.yml
new file mode 100644
index 0000000..1ca721e
--- /dev/null
+++ b/transaction-validation-api/docker-compose.yml
@@ -0,0 +1,47 @@
+version: "3.7"
+services:
+  postgres:
+    image: postgres:14
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: transaction
+  zookeeper:
+    image: confluentinc/cp-zookeeper:5.5.3
+    environment:
+      ZOOKEEPER_CLIENT_PORT: 2181
+
+  kafka:
+    image: confluentinc/cp-enterprise-kafka:5.5.3
+    depends_on:
+      - zookeeper
+    environment:
+      KAFKA_ZOOKEEPER_CONNECT: "zookeeper:2181"
+      KAFKA_ADVERTISED_LISTENERS: "PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092"
+      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: "PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT"
+      KAFKA_BROKER_ID: 1
+      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
+      KAFKA_JMX_PORT: 9991
+    ports:
+      - "9092:9092"
+
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    depends_on:
+      - postgres
+      - kafka
+    ports:
+      - "8080:8080"
+    environment:
+      SPRING_DATASOURCE_URL: jdbc:postgresql://postgres:5432/transaction
+      SPRING_DATASOURCE_USERNAME: postgres
+      SPRING_DATASOURCE_PASSWORD: postgres
+      SPRING_KAFKA_BOOTSTRAP_SERVERS: kafka:9092
+
+volumes:
+  oracle-data: {}
+  oracle-backup: {}
diff --git a/transaction-validation-api/dockerfile b/transaction-validation-api/dockerfile
new file mode 100644
index 0000000..2f5cee1
--- /dev/null
+++ b/transaction-validation-api/dockerfile
@@ -0,0 +1,7 @@
+FROM openjdk:17-jdk-alpine
+
+COPY target/transaction-validation-api-0.0.1-SNAPSHOT.jar java-app.jar
+
+EXPOSE 8080
+
+ENTRYPOINT ["java", "-jar", "java-app.jar"]
diff --git a/transaction-validation-api/mvnw b/transaction-validation-api/mvnw
new file mode 100644
index 0000000..66df285
--- /dev/null
+++ b/transaction-validation-api/mvnw
@@ -0,0 +1,308 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.2.0
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "$(uname)" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        JAVA_HOME="$(/usr/libexec/java_home)"; export JAVA_HOME
+      else
+        JAVA_HOME="/Library/Java/Home"; export JAVA_HOME
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=$(java-config --jre-home)
+  fi
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=$(cygpath --unix "$JAVA_HOME")
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=$(cygpath --path --unix "$CLASSPATH")
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$JAVA_HOME" ] && [ -d "$JAVA_HOME" ] &&
+    JAVA_HOME="$(cd "$JAVA_HOME" || (echo "cannot cd into $JAVA_HOME."; exit 1); pwd)"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="$(which javac)"
+  if [ -n "$javaExecutable" ] && ! [ "$(expr "\"$javaExecutable\"" : '\([^ ]*\)')" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=$(which readlink)
+    if [ ! "$(expr "$readLink" : '\([^ ]*\)')" = "no" ]; then
+      if $darwin ; then
+        javaHome="$(dirname "\"$javaExecutable\"")"
+        javaExecutable="$(cd "\"$javaHome\"" && pwd -P)/javac"
+      else
+        javaExecutable="$(readlink -f "\"$javaExecutable\"")"
+      fi
+      javaHome="$(dirname "\"$javaExecutable\"")"
+      javaHome=$(expr "$javaHome" : '\(.*\)/bin')
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="$(\unset -f command 2>/dev/null; \command -v java)"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=$(cd "$wdir/.." || exit 1; pwd)
+    fi
+    # end of workaround
+  done
+  printf '%s' "$(cd "$basedir" || exit 1; pwd)"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    # Remove \r in case we run on Windows within Git Bash
+    # and check out the repository with auto CRLF management
+    # enabled. Otherwise, we may read lines that are delimited with
+    # \r\n and produce $'-Xarg\r' rather than -Xarg due to word
+    # splitting rules.
+    tr -s '\r\n' ' ' < "$1"
+  fi
+}
+
+log() {
+  if [ "$MVNW_VERBOSE" = true ]; then
+    printf '%s\n' "$1"
+  fi
+}
+
+BASE_DIR=$(find_maven_basedir "$(dirname "$0")")
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}; export MAVEN_PROJECTBASEDIR
+log "$MAVEN_PROJECTBASEDIR"
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+wrapperJarPath="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar"
+if [ -r "$wrapperJarPath" ]; then
+    log "Found $wrapperJarPath"
+else
+    log "Couldn't find $wrapperJarPath, downloading it ..."
+
+    if [ -n "$MVNW_REPOURL" ]; then
+      wrapperUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+    else
+      wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+    fi
+    while IFS="=" read -r key value; do
+      # Remove '\r' from value to allow usage on windows as IFS does not consider '\r' as a separator ( considers space, tab, new line ('\n'), and custom '=' )
+      safeValue=$(echo "$value" | tr -d '\r')
+      case "$key" in (wrapperUrl) wrapperUrl="$safeValue"; break ;;
+      esac
+    done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+    log "Downloading from: $wrapperUrl"
+
+    if $cygwin; then
+      wrapperJarPath=$(cygpath --path --windows "$wrapperJarPath")
+    fi
+
+    if command -v wget > /dev/null; then
+        log "Found wget ... using wget"
+        [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--quiet"
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget $QUIET "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget $QUIET --http-user="$MVNW_USERNAME" --http-password="$MVNW_PASSWORD" "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        log "Found curl ... using curl"
+        [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--silent"
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl $QUIET -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+        else
+            curl $QUIET --user "$MVNW_USERNAME:$MVNW_PASSWORD" -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+        fi
+    else
+        log "Falling back to using Java to download"
+        javaSource="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        javaClass="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.class"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaSource=$(cygpath --path --windows "$javaSource")
+          javaClass=$(cygpath --path --windows "$javaClass")
+        fi
+        if [ -e "$javaSource" ]; then
+            if [ ! -e "$javaClass" ]; then
+                log " - Compiling MavenWrapperDownloader.java ..."
+                ("$JAVA_HOME/bin/javac" "$javaSource")
+            fi
+            if [ -e "$javaClass" ]; then
+                log " - Running MavenWrapperDownloader.java ..."
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$wrapperUrl" "$wrapperJarPath") || rm -f "$wrapperJarPath"
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+# If specified, validate the SHA-256 sum of the Maven wrapper jar file
+wrapperSha256Sum=""
+while IFS="=" read -r key value; do
+  case "$key" in (wrapperSha256Sum) wrapperSha256Sum=$value; break ;;
+  esac
+done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+if [ -n "$wrapperSha256Sum" ]; then
+  wrapperSha256Result=false
+  if command -v sha256sum > /dev/null; then
+    if echo "$wrapperSha256Sum  $wrapperJarPath" | sha256sum -c > /dev/null 2>&1; then
+      wrapperSha256Result=true
+    fi
+  elif command -v shasum > /dev/null; then
+    if echo "$wrapperSha256Sum  $wrapperJarPath" | shasum -a 256 -c > /dev/null 2>&1; then
+      wrapperSha256Result=true
+    fi
+  else
+    echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available."
+    echo "Please install either command, or disable validation by removing 'wrapperSha256Sum' from your maven-wrapper.properties."
+    exit 1
+  fi
+  if [ $wrapperSha256Result = false ]; then
+    echo "Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised." >&2
+    echo "Investigate or delete $wrapperJarPath to attempt a clean download." >&2
+    echo "If you updated your Maven version, you need to update the specified wrapperSha256Sum property." >&2
+    exit 1
+  fi
+fi
+
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=$(cygpath --path --windows "$JAVA_HOME")
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=$(cygpath --path --windows "$CLASSPATH")
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=$(cygpath --path --windows "$MAVEN_PROJECTBASEDIR")
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $*"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+# shellcheck disable=SC2086 # safe args
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
diff --git a/transaction-validation-api/mvnw.cmd b/transaction-validation-api/mvnw.cmd
new file mode 100644
index 0000000..95ba6f5
--- /dev/null
+++ b/transaction-validation-api/mvnw.cmd
@@ -0,0 +1,205 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.2.0
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set WRAPPER_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET WRAPPER_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET WRAPPER_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %WRAPPER_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%WRAPPER_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM If specified, validate the SHA-256 sum of the Maven wrapper jar file
+SET WRAPPER_SHA_256_SUM=""
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperSha256Sum" SET WRAPPER_SHA_256_SUM=%%B
+)
+IF NOT %WRAPPER_SHA_256_SUM%=="" (
+    powershell -Command "&{"^
+       "$hash = (Get-FileHash \"%WRAPPER_JAR%\" -Algorithm SHA256).Hash.ToLower();"^
+       "If('%WRAPPER_SHA_256_SUM%' -ne $hash){"^
+       "  Write-Output 'Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised.';"^
+       "  Write-Output 'Investigate or delete %WRAPPER_JAR% to attempt a clean download.';"^
+       "  Write-Output 'If you updated your Maven version, you need to update the specified wrapperSha256Sum property.';"^
+       "  exit 1;"^
+       "}"^
+       "}"
+    if ERRORLEVEL 1 goto error
+)
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%
diff --git a/transaction-validation-api/pom.xml b/transaction-validation-api/pom.xml
new file mode 100644
index 0000000..9082281
--- /dev/null
+++ b/transaction-validation-api/pom.xml
@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.2.5</version>
+		<relativePath /> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.java.code.challenge</groupId>
+	<artifactId>transaction-validation-api</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>transaction-validation-api</name>
+	<description>API para validar y procesar transacciones financieras.</description>
+	<properties>
+		<java.version>17</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.kafka</groupId>
+			<artifactId>spring-kafka</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.kafka</groupId>
+			<artifactId>spring-kafka-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>1.18.22</version>
+			<scope>provided</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<version>3.11.2</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/TransactionValidationApiApplication.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/TransactionValidationApiApplication.java
new file mode 100644
index 0000000..98ad021
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/TransactionValidationApiApplication.java
@@ -0,0 +1,13 @@
+package com.java.code.challenge.transaction.validation.api;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class TransactionValidationApiApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(TransactionValidationApiApplication.class, args);
+	}
+
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/controller/GlobalExceptionHandler.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/controller/GlobalExceptionHandler.java
new file mode 100644
index 0000000..4169b85
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/controller/GlobalExceptionHandler.java
@@ -0,0 +1,27 @@
+package com.java.code.challenge.transaction.validation.api.controller;
+
+import java.time.LocalDateTime;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.context.request.WebRequest;
+
+import com.java.code.challenge.transaction.validation.api.exception.CustomErrorResponse;
+
+@ControllerAdvice
+public class GlobalExceptionHandler {
+	
+	@ExceptionHandler(IllegalArgumentException.class)
+    public ResponseEntity<CustomErrorResponse> handleIllegalArgumentException(IllegalArgumentException ex, WebRequest request) {
+        CustomErrorResponse error = new CustomErrorResponse(
+            LocalDateTime.now(),
+            HttpStatus.BAD_REQUEST.value(),
+            HttpStatus.BAD_REQUEST.getReasonPhrase(),
+            ex.getMessage(),
+            request.getDescription(false)
+        );
+        return new ResponseEntity<>(error, HttpStatus.BAD_REQUEST);
+    }
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/controller/TransactionController.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/controller/TransactionController.java
new file mode 100644
index 0000000..4493a99
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/controller/TransactionController.java
@@ -0,0 +1,46 @@
+package com.java.code.challenge.transaction.validation.api.controller;
+
+import java.util.List;
+import java.util.UUID;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.java.code.challenge.transaction.validation.api.dto.TransactionRequest;
+import com.java.code.challenge.transaction.validation.api.dto.TransactionResponse;
+import com.java.code.challenge.transaction.validation.api.model.Transaction;
+import com.java.code.challenge.transaction.validation.api.service.TransactionService;
+
+@RestController
+@RequestMapping("/api/transactions")
+public class TransactionController {
+
+	@Autowired
+	private TransactionService service;
+
+	@PostMapping("/create")
+	public ResponseEntity<Transaction> createTransaction(@RequestBody TransactionRequest request) {
+		Transaction createTx = service.createTransaction(request);
+		return ResponseEntity.ok(createTx);
+
+	}
+
+	@GetMapping
+	public ResponseEntity<List<Transaction>> getAllTrasanctions() {
+		List<Transaction> transactions = service.getAllTransactions();
+		return ResponseEntity.ok(transactions);
+	}
+	
+	@GetMapping("/search")
+    public ResponseEntity<List<TransactionResponse>> getTransactionsByAccountExternalId(@RequestParam UUID accountExternalId) {
+        List<TransactionResponse> response = service.getTransactionsByAccountExternalId(accountExternalId);
+        return ResponseEntity.ok(response);
+    }
+
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionRequest.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionRequest.java
new file mode 100644
index 0000000..c8a3e40
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionRequest.java
@@ -0,0 +1,15 @@
+package com.java.code.challenge.transaction.validation.api.dto;
+
+import java.util.UUID;
+
+import lombok.Data;
+
+@Data
+public class TransactionRequest {
+
+	private UUID accountExternalIdDebit;
+	private UUID accountExternalIdCredit;
+	private String tranType;
+	private double value;
+	private String status;
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionResponse.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionResponse.java
new file mode 100644
index 0000000..a595d68
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionResponse.java
@@ -0,0 +1,18 @@
+package com.java.code.challenge.transaction.validation.api.dto;
+
+import java.time.LocalDateTime;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+import lombok.Data;
+
+@Data
+public class TransactionResponse {
+	
+	private String transactionExternalId;
+    private TransactionType transactionType;
+    private TransactionStatus transactionStatus;
+    private double value;
+    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy HH:mm:ss")
+    private LocalDateTime createdAt;
+}	
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionStatus.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionStatus.java
new file mode 100644
index 0000000..d71355d
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionStatus.java
@@ -0,0 +1,10 @@
+package com.java.code.challenge.transaction.validation.api.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class TransactionStatus {
+	private String name;
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionType.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionType.java
new file mode 100644
index 0000000..c4162d0
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/dto/TransactionType.java
@@ -0,0 +1,10 @@
+package com.java.code.challenge.transaction.validation.api.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class TransactionType {
+	private String name;
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/exception/CustomErrorResponse.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/exception/CustomErrorResponse.java
new file mode 100644
index 0000000..099de5e
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/exception/CustomErrorResponse.java
@@ -0,0 +1,18 @@
+package com.java.code.challenge.transaction.validation.api.exception;
+
+import java.time.LocalDateTime;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class CustomErrorResponse {
+
+	private LocalDateTime timestamp;
+	private int status;
+	private String error;
+	private String message;
+	private String path;
+
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/exception/TransactionNotFoundException.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/exception/TransactionNotFoundException.java
new file mode 100644
index 0000000..b8ade1e
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/exception/TransactionNotFoundException.java
@@ -0,0 +1,14 @@
+package com.java.code.challenge.transaction.validation.api.exception;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class TransactionNotFoundException extends RuntimeException {
+
+	private static final long serialVersionUID = 9085762026269683548L;
+
+	public TransactionNotFoundException(String message) {
+		super(message);
+	}
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KConsumerConfig.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KConsumerConfig.java
new file mode 100644
index 0000000..b5253e2
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KConsumerConfig.java
@@ -0,0 +1,43 @@
+package com.java.code.challenge.transaction.validation.api.kafka;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.common.serialization.StringDeserializer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.kafka.annotation.EnableKafka;
+import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
+import org.springframework.kafka.core.ConsumerFactory;
+import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
+import org.springframework.kafka.support.serializer.JsonDeserializer;
+
+import com.java.code.challenge.transaction.validation.api.model.Transaction;
+
+@Configuration
+@EnableKafka
+public class KConsumerConfig {
+	
+	@Bean
+    public ConsumerFactory<String, Transaction> consumerFactory() {
+        Map<String, Object> props = new HashMap<>();
+        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "kafka:29092");
+        props.put(ConsumerConfig.GROUP_ID_CONFIG, "transaction-group");
+        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
+        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class);
+        props.put(JsonDeserializer.TRUSTED_PACKAGES, "*");
+
+        return new DefaultKafkaConsumerFactory<>(props, new StringDeserializer(),
+                new JsonDeserializer<>(Transaction.class));
+    }
+	
+	 @Bean
+	    public ConcurrentKafkaListenerContainerFactory<String, Transaction> kafkaListenerContainerFactory() {
+	        ConcurrentKafkaListenerContainerFactory<String, Transaction> factory =
+	                new ConcurrentKafkaListenerContainerFactory<>();
+	        factory.setConsumerFactory(consumerFactory());
+	        return factory;
+	    }
+
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KProducerConfig.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KProducerConfig.java
new file mode 100644
index 0000000..d34537d
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KProducerConfig.java
@@ -0,0 +1,36 @@
+package com.java.code.challenge.transaction.validation.api.kafka;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.kafka.common.serialization.StringSerializer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.kafka.core.DefaultKafkaProducerFactory;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.core.ProducerFactory;
+import org.springframework.kafka.support.serializer.JsonSerializer;
+
+import com.java.code.challenge.transaction.validation.api.model.Transaction;
+
+@Configuration
+public class KProducerConfig {
+
+	@Bean
+	public ProducerFactory<String, Transaction> producerFactory() {
+
+		Map<String, Object> configProps = new HashMap<>();
+
+		configProps.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "kafka:29092");
+		configProps.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
+		configProps.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, JsonSerializer.class);
+
+		return new DefaultKafkaProducerFactory<>(configProps);
+	}
+
+	@Bean
+	public KafkaTemplate<String, Transaction> kafkaTemplate() {
+		return new KafkaTemplate<>(producerFactory());
+	}
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KafkaService.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KafkaService.java
new file mode 100644
index 0000000..d14c908
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/kafka/KafkaService.java
@@ -0,0 +1,21 @@
+package com.java.code.challenge.transaction.validation.api.kafka;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.kafka.annotation.KafkaListener;
+import org.springframework.stereotype.Service;
+
+import com.java.code.challenge.transaction.validation.api.model.Transaction;
+import com.java.code.challenge.transaction.validation.api.service.TransactionService;
+
+@Service
+public class KafkaService {
+
+	@Autowired
+	private TransactionService transactionService;
+
+	@KafkaListener(topics = "transactions-topic", groupId = "transaction-group")
+	public void listenTransactionStatus(Transaction transaction) {
+		System.out.println("Received: " + transaction);
+		transactionService.updateTransactionStatus(transaction);
+	}
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/model/Transaction.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/model/Transaction.java
new file mode 100644
index 0000000..b38935c
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/model/Transaction.java
@@ -0,0 +1,35 @@
+package com.java.code.challenge.transaction.validation.api.model;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+import org.hibernate.annotations.CreationTimestamp;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import lombok.Data;
+
+@Entity
+@Data
+public class Transaction {
+	
+	@Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+	private Long id;
+	@JsonSerialize(using = ToStringSerializer.class)
+    private UUID accountExternalIdDebit;
+	@JsonSerialize(using = ToStringSerializer.class)
+    private UUID accountExternalIdCredit;
+    private String tranType;
+    private double value;
+    private String status;
+    @CreationTimestamp
+    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy HH:mm:ss")
+    private LocalDateTime createdAt;
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/repository/TransactionRepository.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/repository/TransactionRepository.java
new file mode 100644
index 0000000..e615e86
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/repository/TransactionRepository.java
@@ -0,0 +1,16 @@
+package com.java.code.challenge.transaction.validation.api.repository;
+
+import java.util.List;
+import java.util.UUID;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+import com.java.code.challenge.transaction.validation.api.model.Transaction;
+
+public interface TransactionRepository extends JpaRepository<Transaction, Long> {
+	
+	@Query("SELECT t FROM Transaction t WHERE t.accountExternalIdDebit = :accountExternalId OR t.accountExternalIdCredit = :accountExternalId")
+    List<Transaction> findByAccountExternalId(@Param("accountExternalId") UUID accountExternalId);
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/service/TransactionService.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/service/TransactionService.java
new file mode 100644
index 0000000..a889a00
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/service/TransactionService.java
@@ -0,0 +1,19 @@
+package com.java.code.challenge.transaction.validation.api.service;
+
+import java.util.List;
+import java.util.UUID;
+
+import com.java.code.challenge.transaction.validation.api.dto.TransactionRequest;
+import com.java.code.challenge.transaction.validation.api.dto.TransactionResponse;
+import com.java.code.challenge.transaction.validation.api.model.Transaction;
+
+public interface TransactionService {
+
+	Transaction createTransaction(TransactionRequest request);
+
+	List<Transaction> getAllTransactions();
+
+	void updateTransactionStatus(Transaction transaction);
+
+	List<TransactionResponse> getTransactionsByAccountExternalId(UUID accountExternalId);
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/service/impl/TransactionServiceImpl.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/service/impl/TransactionServiceImpl.java
new file mode 100644
index 0000000..69d17d6
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/service/impl/TransactionServiceImpl.java
@@ -0,0 +1,83 @@
+package com.java.code.challenge.transaction.validation.api.service.impl;
+
+import java.util.List;
+import java.util.NoSuchElementException;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.stereotype.Service;
+
+import com.java.code.challenge.transaction.validation.api.dto.TransactionRequest;
+import com.java.code.challenge.transaction.validation.api.dto.TransactionResponse;
+import com.java.code.challenge.transaction.validation.api.dto.TransactionStatus;
+import com.java.code.challenge.transaction.validation.api.dto.TransactionType;
+import com.java.code.challenge.transaction.validation.api.exception.TransactionNotFoundException;
+import com.java.code.challenge.transaction.validation.api.model.Transaction;
+import com.java.code.challenge.transaction.validation.api.repository.TransactionRepository;
+import com.java.code.challenge.transaction.validation.api.service.TransactionService;
+import com.java.code.challenge.transaction.validation.api.util.Constantes;
+
+@Service
+public class TransactionServiceImpl implements TransactionService {
+
+	@Autowired
+	private TransactionRepository transactionRepository;
+
+	@Autowired
+	private KafkaTemplate<String, Transaction> kafkaTemplate;
+
+	
+
+	@Override
+	public Transaction createTransaction(TransactionRequest request) {
+		return Optional.of(request).filter(tx -> tx.getValue() >= 0).map(tx -> {
+			Transaction transaction = new Transaction();
+			transaction.setAccountExternalIdDebit(tx.getAccountExternalIdDebit());
+			transaction.setAccountExternalIdCredit(tx.getAccountExternalIdCredit());
+			transaction.setTranType(tx.getTranType());
+			transaction.setValue(tx.getValue());
+			transaction.setStatus(Constantes.ESTADO_PENDIENTE);
+
+			Transaction savedTransaction = transactionRepository.save(transaction);
+			kafkaTemplate.send(Constantes.TOPIC, transaction.getId().toString(), transaction);
+			return savedTransaction;
+		}).orElseThrow(() -> new IllegalArgumentException(Constantes.EX_NEGATIVO));
+	}
+
+	@Override
+	public List<Transaction> getAllTransactions() {
+		return transactionRepository.findAll();
+	}
+
+	@Override
+	public void updateTransactionStatus(Transaction transaction) {
+		transactionRepository.findById(transaction.getId()).map(tx -> {
+			tx.setStatus(tx.getValue() > 1000 ? Constantes.ESTADO_RECHAZADO : Constantes.ESTADO_APROBADO);
+			return transactionRepository.save(tx);
+		}).orElseThrow(() -> new NoSuchElementException(Constantes.EX_ID_NOT_FOUND + transaction.getId()));
+	}
+
+	@Override
+	public List<TransactionResponse> getTransactionsByAccountExternalId(UUID accountExternalId) {
+		List<Transaction> transactions = transactionRepository.findByAccountExternalId(accountExternalId);
+
+		return Optional.of(transactions).filter(trans -> !trans.isEmpty())
+				.map(trans -> trans.stream().map(transaction -> mapToResponse(transaction, accountExternalId))
+						.collect(Collectors.toList()))
+				.orElseThrow(() -> new TransactionNotFoundException(Constantes.NOT_FOUND + accountExternalId));
+	}
+
+	private TransactionResponse mapToResponse(Transaction transaction, UUID accountExternalId) {
+		TransactionResponse response = new TransactionResponse();
+		response.setTransactionExternalId(accountExternalId.toString());
+		response.setTransactionType(new TransactionType(transaction.getTranType()));
+		response.setTransactionStatus(new TransactionStatus(transaction.getStatus()));
+		response.setValue(transaction.getValue());
+		response.setCreatedAt(transaction.getCreatedAt());
+		return response;
+	}
+
+}
diff --git a/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/util/Constantes.java b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/util/Constantes.java
new file mode 100644
index 0000000..d20d098
--- /dev/null
+++ b/transaction-validation-api/src/main/java/com/java/code/challenge/transaction/validation/api/util/Constantes.java
@@ -0,0 +1,18 @@
+package com.java.code.challenge.transaction.validation.api.util;
+
+public class Constantes {
+
+	public static final String ESTADO_PENDIENTE = "Pendiente";
+
+	public static final String ESTADO_APROBADO = "Aprobado";
+
+	public static final String ESTADO_RECHAZADO = "Rechazado";
+	
+	public static final String EX_NEGATIVO = "El valor de la transacción no puede ser negativo.";
+	
+	public static final String EX_ID_NOT_FOUND = "No se encontró la transacción con ID: ";
+	
+	public static final String TOPIC = "transactions-topic";
+	
+	public static final String NOT_FOUND = "No se encontraron transacciones para accountExternalId: ";
+}
diff --git a/transaction-validation-api/src/main/resources/application.properties b/transaction-validation-api/src/main/resources/application.properties
new file mode 100644
index 0000000..bbc8d07
--- /dev/null
+++ b/transaction-validation-api/src/main/resources/application.properties
@@ -0,0 +1,9 @@
+spring.application.name=transaction-validation-api
+spring.datasource.url=${SPRING_DATASOURCE_URL}
+spring.datasource.username=${SPRING_DATASOURCE_USERNAME}
+spring.datasource.password=${SPRING_DATASOURCE_PASSWORD}
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
+spring.jpa.hibernate.ddl-auto=update
+spring.kafka.consumer.properties.spring.json.value.default.type=com.java.code.challenge.transaction.validation.api.model.Transaction
+spring.kafka.consumer.properties.spring.json.trusted.packages=*
+auto.create.topics.enable=true
diff --git a/transaction-validation-api/src/test/java/com/java/code/challenge/transaction/validation/api/TransactionServiceImplTest.java b/transaction-validation-api/src/test/java/com/java/code/challenge/transaction/validation/api/TransactionServiceImplTest.java
new file mode 100644
index 0000000..8fbe889
--- /dev/null
+++ b/transaction-validation-api/src/test/java/com/java/code/challenge/transaction/validation/api/TransactionServiceImplTest.java
@@ -0,0 +1,119 @@
+package com.java.code.challenge.transaction.validation.api;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.kafka.core.KafkaTemplate;
+
+import com.java.code.challenge.transaction.validation.api.dto.TransactionRequest;
+import com.java.code.challenge.transaction.validation.api.dto.TransactionResponse;
+import com.java.code.challenge.transaction.validation.api.exception.TransactionNotFoundException;
+import com.java.code.challenge.transaction.validation.api.model.Transaction;
+import com.java.code.challenge.transaction.validation.api.repository.TransactionRepository;
+import com.java.code.challenge.transaction.validation.api.service.impl.TransactionServiceImpl;
+import com.java.code.challenge.transaction.validation.api.util.Constantes;
+
+@ExtendWith(MockitoExtension.class)
+public class TransactionServiceImplTest {
+
+	@Mock
+	private TransactionRepository transactionRepository;
+
+	@Mock
+	private KafkaTemplate<String, Transaction> kafkaTemplate;
+
+	@InjectMocks
+	private TransactionServiceImpl transactionService;
+
+	private Transaction transaction;
+	private TransactionRequest transactionRequest;
+	private UUID accountExternalId;
+
+	@BeforeEach
+	void setUp() {
+		transaction = new Transaction();
+		transaction.setId(1L);
+		transaction.setAccountExternalIdDebit(UUID.randomUUID());
+		transaction.setAccountExternalIdCredit(UUID.randomUUID());
+		transaction.setTranType("Agente");
+		transaction.setValue(999.0);
+		transaction.setStatus("Aprobado");
+
+		transactionRequest = new TransactionRequest();
+		transactionRequest.setAccountExternalIdDebit(UUID.randomUUID());
+		transactionRequest.setAccountExternalIdCredit(UUID.randomUUID());
+		transactionRequest.setTranType("Agente");
+		transactionRequest.setValue(999.0);
+		transactionRequest.setStatus("");
+
+		accountExternalId = UUID.randomUUID();
+	}
+
+	@Test
+	void testCreateTransactionWithNegativeValue() {
+		transactionRequest.setValue(-100.0);
+
+		IllegalArgumentException thrown = assertThrows(IllegalArgumentException.class,
+				() -> transactionService.createTransaction(transactionRequest),
+				"Se esperaba que createTransaction() lanzara una excepción");
+
+		assertTrue(thrown.getMessage().contains(Constantes.EX_NEGATIVO));
+		verify(kafkaTemplate, times(0)).send(anyString(), any(Transaction.class));
+		verify(transactionRepository, times(0)).save(any(Transaction.class));
+	}
+
+	@Test
+    void testGetAllTransactions() {
+        when(transactionRepository.findAll()).thenReturn(Arrays.asList(transaction));
+
+        List<Transaction> result = transactionService.getAllTransactions();
+
+        assertFalse(result.isEmpty());
+        assertEquals(1, result.size());
+        verify(transactionRepository, times(1)).findAll();
+    }
+
+	@Test
+    void testGetTransactionsByAccountExternalId() {
+        when(transactionRepository.findByAccountExternalId(any(UUID.class)))
+                .thenReturn(Arrays.asList(transaction));
+
+        List<TransactionResponse> result = transactionService.getTransactionsByAccountExternalId(accountExternalId);
+
+        assertFalse(result.isEmpty());
+        assertEquals(1, result.size());
+        verify(transactionRepository, times(1)).findByAccountExternalId(accountExternalId);
+    }
+
+	@Test
+    void testGetTransactionsByAccountExternalIdNotFound() {
+        when(transactionRepository.findByAccountExternalId(any(UUID.class)))
+                .thenReturn(Arrays.asList());
+
+        TransactionNotFoundException thrown = assertThrows(
+            TransactionNotFoundException.class,
+            () -> transactionService.getTransactionsByAccountExternalId(accountExternalId),
+            "Se esperaba que getTransactionsByAccountExternalId() lanzara una excepción"
+        );
+
+        assertTrue(thrown.getMessage().contains("No se encontraron transacciones"));
+        verify(transactionRepository, times(1)).findByAccountExternalId(accountExternalId);
+    }
+}
diff --git a/transaction-validation-api/src/test/java/com/java/code/challenge/transaction/validation/api/TransactionValidationApiApplicationTests.java b/transaction-validation-api/src/test/java/com/java/code/challenge/transaction/validation/api/TransactionValidationApiApplicationTests.java
new file mode 100644
index 0000000..0264fc2
--- /dev/null
+++ b/transaction-validation-api/src/test/java/com/java/code/challenge/transaction/validation/api/TransactionValidationApiApplicationTests.java
@@ -0,0 +1,13 @@
+package com.java.code.challenge.transaction.validation.api;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class TransactionValidationApiApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}