Patryk Pawłowski-Senior Fullstack Engineer
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Experience
Senior Fullstack Product Engineer
A.Team
- Langan | Senior Fullstack Engineer: Converted the Langan Copilot proof-of-concept (AI-driven Phase I Environmental Site Assessment report automation) into a production application. Re-architected the React codebase, introduced React Query caching and React Hook Form + Zod validation, and split a monolithic UI into a maintainable component structure. Shipped fullstack features (authentication, API error handling, data filtering, generated-content management, site questionnaire) in React / Python / FastAPI, improving initial load time by ~45% and cutting redundant API calls by ~20%.
- ApartTech | Senior Next.js Engineer: Led frontend for the leads feature of an apartment-rental platform (Next.js, React, TypeScript, Shadcn) using an AI-assisted workflow: authored agent rules and reusable core components for Claude Code, and integrated MCP to convert Figma designs into code via automated screenshot-versus-design iteration. Cut design-to-code turnaround by ~60% and shipped complex multi-step forms in half the estimated time.
- Foyer | Lead Design Engineer: Led the complete UI redesign of a fintech app for first-time homebuyers (React). Built a reusable UI component library that cut feature-delivery time by ~35%, re-architected the codebase, mentored 2 junior developers, and ran thorough code reviews while partnering with the Product Designer to resolve edge cases before implementation.
- TerrAI | Senior Fullstack Engineer: Led frontend of a cross-platform AI assistant for property management (React) and built backend features in NestJS (TypeScript) and FastAPI (Python). Integrated AI features for auto-answering emails and processing documents, handling 200+ documents per week.
Independent Game Development & Personal Projects
BadgerSquared
- Designed, built, and shipped two games in Unity / C#, and released: Time Glitch, a story-driven time-loop puzzle, and Rescue Command, a one-bit 'knowledgevania.'
- Learned pixel art from scratch and released to 5,000+ combined downloads.
- Completed a half-Ironman triathlon.
Senior Fullstack Developer
BCG
- Built Python / Django applications managing large-scale marketing campaigns across 20M+ data points.
- Founded and led an internal UI component library adopted across 12+ projects, standardizing frontend delivery firm-wide.
- Led development of a data-heavy React application and integrated AI/LLM features to generate marketing materials (slogans, images, email templates), reducing content-production time for campaign teams by ~90%.
Senior Fullstack Developer
Toptal
- Delivered projects across the stack as a contractor.
- Modernized CI/CD and developer tooling for a fintech identity-protection company (Bash, Node.js, TypeScript), reducing build times and manual release steps.
- Built a React Native app for cycling meetups.
- Additional work: REST APIs (Node.js, Firebase), a React UI for teaching a custom Jira-workflow scripting language, and the UFC Performance Institute landing page (Webflow, JavaScript).
Senior Frontend Developer
MCH Group
- Led frontend of a multi-tenant Vue platform for managing art fairs and galleries.
- Architected a shared UI component library and crafted the micro-interactions and UI polish that defined the product's design quality across tenants.
Owner & WordPress Developer
Mevove Studio
- Ran a web studio delivering 30+ projects, including e-commerce for item lending and roller blinds, a training site for security specialists, a patient portal for a cancer-support NGO, and dozens of startup landing pages.
- Managed a team of 2–5 and worked hands-on across WordPress, PHP, jQuery, Sass, and UI design.
Industry Experience
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Experienced in Banking and Finance, Education, Healthcare, Retail, Information Technology, and Sport.
Business Area Experience
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Experienced in Information Technology, Product Development, Project Management, and Marketing.
Summary
Senior Fullstack Engineer with 13 years across the JavaScript/TypeScript stack, working end-to-end from React/Next.js front ends to Node.js, NestJS, and Python back ends. I own frontend architecture, UI performance, and design-engineering — shipping polished UIs with micro-interactions — and increasingly integrate AI/LLM features and AI-assisted development workflows. Founded UI component libraries reused across 15+ projects and mentored engineers through rigorous code review.
Skills
- Core: Typescript, Javascript, React, Next.Js, System Design, Frontend Architecture, Ui Performance, Design Engineering, Micro-Interactions & Animation, Ux
- Backend & Data: Node.Js, Nestjs, Express, Python, Fastapi, Django, Postgresql, Mysql, Mongodb, Redis, Prisma Orm
- Ai/Llm: Llm Integration, Claude Code, Mcp, Ai-Agent Workflows, Prompt & Rules Engineering, Ai-Assisted Code Review & Testing, Rag
- Cloud: Aws (S3, Ec2, Lambda, Dynamodb, Rds), Supabase, Firebase
- Tooling & Practices: Git, Docker, Ci/Cd, Testing (Jest, Vitest, React Testing Library, Playwright), Clean Code, Code Review, Continuous Deployment, Monitoring
- Ui: Mui, Shadcn, Tailwind, Styled Components, Sass, Html, Css; React Native, Ionic, Capacitor
- Also Worked With: Vue, Php, C#, Unity, Wordpress, Jquery
Languages
Education
Polish-Japanese Academy of Information Technology
Bachelor of Arts · Graphic Design · Warszawa, Poland
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