Full Stack Developer based in UK | Building scalable web applications with React, Node.js, PHP & TypeScript

• 🔭 Currently building fire safety compliance system for FireSpec Ltd using Laravel & Next.js
• 💼 Commercial experience at ZipTangle Ltd (fintech startup) and Kindly Project (open-source community platform)
• 🎯 Specialized in: Full-stack development, RESTful APIs, database design, third-party integrations
• 🌱 Career switcher: from 12 years in Oil & Gas industry to tech development
• 📍 Open to remote, hybrid, and on-site opportunities across the UK
• 🌐 Portfolio: yuriipetrovskyi.co.uk

Frontend:

Backend:

Databases:

Tools & DevOps:

Testing:

Full-stack event discovery and management system with AI assistant

Comprehensive event management application featuring AI-powered assistance, multi-view calendar, role-based access control, and production-ready security practices. Built as part of IT company internship application.

• Tech Stack: NestJS, TypeScript, PostgreSQL, Prisma ORM, React 18, Redux Toolkit, Zustand, Tailwind CSS, Docker
• Key Features:
  • REST API with JWT authentication and role-based access control (RBAC)
  • AI assistant powered by Groq LLM (llama-3.3-70b) with context-aware event recommendations
  • PostgreSQL database with Prisma ORM (events, participants, tags, many-to-many relations)
  • Custom multi-view calendar (Month / Week / Day / Agenda / Year) for event tracking
  • React 18 SPA with Redux Toolkit for global state and Zustand for local state management
  • React Hook Form for validated forms with real-time error handling
  • Security: rate limiting on auth/AI endpoints, HTTP security headers (Helmet), input validation (class-validator)
  • Component documentation with Storybook
• DevOps: Docker Compose containerization, backend deployed to Render, frontend to Vercel, PostgreSQL to Neon, automated CI/CD via GitHub PRs

Interactive country information portal with real-time data

Real-time geospatial application providing comprehensive country data including borders, weather, news, and currency information through interactive maps and multiple API integrations.

• Tech Stack: PHP, JavaScript, Leaflet.js, jQuery, AJAX, Bootstrap
• Key Features:
  • Interactive Leaflet.js maps with country borders and markers
  • Real-time weather data and 5-day forecasts (OpenWeatherMap API)
  • Live news feed integration with filtering
  • Currency exchange rates with multi-currency support
  • Wikipedia integration for country information
  • AJAX-powered dynamic content loading
• APIs: OpenWeatherMap, OpenCage Geocoding, GeoNames, Currencylayer, Guardian News API, RESTCountries, Wikipedia API

Employee & department management system

Full-stack employee and department management application with real-time database integration, advanced search capabilities, and comprehensive CRUD operations for multi-user environments.

• Tech Stack: PHP, MySQL, JavaScript, jQuery, AJAX, Bootstrap
• Key Features:
  • Complete CRUD operations for personnel, departments, and locations
  • Real-time search and filtering across all database entities
  • Cascading relationship management with dependency checking
  • RESTful API architecture with PHP backend
  • Responsive Bootstrap UI with modal-based workflows
  • MySQL database with normalized schema design

Full Stack Developer · FireSpec Ltd (Contract Project, Apr 2025 - Present)

• Building fire safety compliance system with Laravel backend and Next.js frontend
• Designed secure backend services using Laravel and MySQL
• Built scalable frontend with Next.js, TypeScript and Tailwind
• Implemented RBAC and secure authentication flows

Full Stack Engineer at ZipTangle Ltd (Jun 2024 - Present)

• Designed Stripe payment flows (checkout, subscriptions, webhooks)
• Built REST APIs using Node.js and TypeScript
• Configured CI/CD via GitHub Actions and AWS Amplify

Full Stack Developer at Kindly Project (Apr 2024 - Jun 2025)

• Built core features with React, Next.js and TypeScript
• Integrated Supabase (PostgreSQL-based BaaS)
• Implemented E2E testing with Cypress

⚡ "From analyzing oil wells to building web applications - bringing analytical mindset to tech development"