Full-stack TypeScript Developer based in Warsaw, Poland. I build and deploy web and mobile products with React/Next.js, Node.js/NestJS, React Native/Expo, and Flutter. I also develop PHP/Symfony systems, APIs, integrations, and background jobs.

A representative selection of my work, not a complete project list.

HR system developed in one monorepo with a Symfony API and worker, a Next.js web application, Go tooling, and PostgreSQL.

• Architecture: separate command, query, and event buses; infrastructure ports and adapters; transactional outbox with idempotent handlers, retries, and dead-letter states.
• Delivery: four Railway services, automated CI gates, daily PostgreSQL backups, and isolated restore drills.
• Stack: PHP 8.2+, Symfony 7.4, Doctrine, Messenger, Next.js 16, TypeScript, Go, PostgreSQL, Docker, Railway.

Bilingual B2B platform for presenting services, collecting enquiries, and supporting company processes.

• Architecture: modular monolith with capability-aligned modules, application use cases, ports and adapters, and repository interfaces.
• Contract: OpenAPI is the source of truth for a generated TypeScript client.
• Stack: Next.js, React, TypeScript, Fastify, PostgreSQL, Redis, Render.

Modernization of an editorial Laravel/Blade site into a publishing platform built with Next.js and TypeScript.

• Architecture: the editorial CMS feeds a separate MySQL public read model; TypeORM repositories and explicit migrations isolate runtime reads from content editing.
• Code: Next.js platform and Laravel reference implementation.
• Stack: Next.js 16, React 19, TypeScript, Laravel 11, PHP 8.3, Strapi 5, MySQL 8, Docker, Nginx.

Bilingual full-stack portfolio with a Next.js frontend, NestJS backend, and an asynchronously delivered contact form.

• Architecture: ports and adapters plus repository pattern in the contact and portfolio modules; outbox delivery with retry/backoff, idempotency, and signed provider webhooks.
• Code: przemekp95/wizytowka.
• Stack: TypeScript, React, Next.js 16, NestJS 11, MongoDB, Prisma, REST, GraphQL, Docker, Playwright.

• Frontend and mobile: TypeScript, React, Next.js, React Native, Expo, Flutter, HTML5, CSS3, Tailwind CSS.
• Backend and APIs: Node.js, NestJS, Fastify, PHP, Symfony, Laravel, REST, GraphQL, OpenAPI, Webhooks, WebSockets/Socket.IO, Messenger.
• Data and messaging: PostgreSQL, MySQL, MongoDB, Redis, queues, and background jobs.
• Architecture and patterns: microservices architecture, distributed services, modular monolith, Clean/Hexagonal Architecture, ports and adapters, DDD-style bounded contexts, CQRS, Event Sourcing, aggregates and domain events, projections, outbox/inbox, state machines, idempotency, and retry/backoff.
• Delivery: Docker, GitHub Actions, Jenkins, Railway, Render, Nginx.
• Testing: Playwright, Jest, React Testing Library, PHPUnit, PHPStan, and executable BDD scenarios.

I am focused on full-stack TypeScript, React, and Node.js roles. I also bring hands-on PHP/Symfony experience for APIs, queues, integrations, legacy modernization, and distributed web and mobile systems.

• Portfolio: pietrzakprzemyslaw.pl
• LinkedIn: linkedin.com/in/przempietrzak
• Email: contact@pietrzakprzemyslaw.pl
• Location: Warsaw, Poland

Tworzę i wdrażam aplikacje full-stack w TypeScript: React i Next.js po stronie frontendu oraz Node.js i NestJS po stronie backendu. Rozwijam też systemy PHP/Symfony, API, kolejki, integracje i procesy w tle.