diff --git a/.gitignore b/.gitignore
index 52b390f5..82c36cbe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,3 +39,6 @@ next-env.d.ts
 dist/
 
 diagram.txt
+
+# localstack
+localstack/data/
diff --git a/compose.yaml b/compose.yaml
index bf03b514..f9da6cbb 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -9,6 +9,11 @@ services:
       DATABASE_URL: postgresql://postgres:asdfasdf@db:5432/postgres
       TEST_DATABASE_URL: postgresql://postgres:asdfasdf@test_db:5432/postgres
       JOB_FUNCTION_URL: http://job_worker:8080/2015-03-31/functions/function/invocations
+      AWS_REGION: us-east-1
+      AWS_ACCESS_KEY_ID: test
+      AWS_SECRET_ACCESS_KEY: test
+      AWS_ENDPOINT_URL_S3: http://localstack:4566
+      AWS_S3_FORCE_PATH_STYLE: "true"
     volumes:
       - ./:/app
       - server-node-modules:/app/node_modules
@@ -17,6 +22,8 @@ services:
     depends_on:
       db:
         condition: service_healthy
+      localstack:
+        condition: service_healthy
   job_worker:
     build:
       context: .
@@ -25,6 +32,12 @@ services:
     restart: always
     environment:
       DATABASE_URL: postgresql://postgres:asdfasdf@db:5432/postgres
+      AWS_REGION: us-east-1
+      AWS_ACCESS_KEY_ID: test
+      AWS_SECRET_ACCESS_KEY: test
+      AWS_ENDPOINT_URL_S3: http://localstack:4566
+      AWS_S3_FORCE_PATH_STYLE: "true"
+      EXPORT_PUBLIC_S3_ENDPOINT: http://localhost:4566
     volumes:
       - ./:/app
       - job-worker-node-modules:/app/node_modules
@@ -33,9 +46,27 @@ services:
     depends_on:
       db:
         condition: service_healthy
+      localstack:
+        condition: service_healthy
     env_file:
       - path: .env
         required: false
+  localstack:
+    image: localstack/localstack:4
+    environment:
+      - SERVICES=s3
+      - DEFAULT_REGION=us-east-1
+      - LS_LOG=warn
+    volumes:
+      - ./localstack/data:/var/lib/localstack
+      - ./localstack/init:/etc/localstack/init
+    ports:
+      - 4566:4566
+    healthcheck:
+      test: ["CMD", "bash", "-c", "awslocal s3 ls >/dev/null 2>&1"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
   db:
     build:
       dockerfile: db/Dockerfile
diff --git a/localstack/init/ready.d/init.sh b/localstack/init/ready.d/init.sh
new file mode 100755
index 00000000..14097702
--- /dev/null
+++ b/localstack/init/ready.d/init.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+set -eu
+
+bucket_prefix="${EXPORT_BUCKET_PREFIX:-gbt-exports}"
+bucket_name="${bucket_prefix}-local"
+
+if ! awslocal s3api head-bucket --bucket "$bucket_name" >/dev/null 2>&1; then
+  awslocal s3 mb "s3://${bucket_name}" >/dev/null
+fi
+
+echo "Localstack S3 bucket ready: ${bucket_name}"