11/06/2026 updated
100 % available
Senior Full-Stack Engineer | React, TypeScript & Node.js | AI-assisted Development
Wroclaw, Poland
Only remote
Master's, Computer Science – Lviv Polytechnic National University (2004–2007)About me
Engineering leader and hands-on Full-Stack Engineer with 19+ years of experience in React, TypeScript, and Node.js. I lead teams, build scalable SaaS products, mentor engineers, and drive AI-assisted workflows. Open to Engineering Lead, Senior Full-Stack, and Frontend roles.
AI AgentsPostgreSQLNode.jsTypeScriptBackendFull Stack DevelopmentFront End Software Development
I’m an engineering leader and hands-on Full-Stack Engineer with 19+ years of experience building web applications and SaaS products, primarily with React, TypeScript, and Node.js.
Most recently, as an Engineering Manager at Rebbix working on day.io / Oitchau, I led seven developers, owned team delivery, and set frontend technical direction across teams. Alongside management, I continued building frontend features, implementing backend integrations, and resolving production issues.
My experience includes architecting a React application that grew to approximately 100 screens, migrating around 80% of it to TypeScript, and leading the technical design of monthly reporting for 15,000 employees. I also supported engineers’ career progression through coaching, performance feedback, and development planning.
I build practical AI-assisted development workflows, including custom skills, MCP integrations, and Playwright-based verification, with approaches adopted across teams.
I’m open to Engineering Lead, Senior Full-Stack, and Senior Frontend opportunities. I enjoy combining hands-on development with technical direction, mentoring, and close collaboration with Product.
Experience
Professional experience10+ years
Freelancer since2026
Languages
EnglishFluentPolishBasic knowledgeUkrainianNative speaker
Project history
Multi-tenant workforce-management SaaS serving approximately 1,000 companies across Brazil and Latin America with up to 15,000 users. Architected the React administration application, migrated approximately 80% of the codebase from JavaScript to TypeScript, built AI-assisted workflows and MCP integrations, implemented bulk Excel and SAP SuccessFactors imports, led design of asynchronous reporting pipelines, and designed white-labelling architecture. As Engineering Manager, managed team delivery with QA and Product, coordinated cross-team releases and supported backend engineers through mentoring and performance reviews.
Built a movie-discovery web app and React Native iOS/Android apps, owning frontend, backend and mobile development. Implemented authentication, favorites, TMDB integration and content processing in five languages. Project discontinued.
Travel guide web product reaching approximately one million monthly visitors and 1,500 peak concurrent users. Built custom React server-side rendering using React, Koa, MongoDB, GCP, Cloudflare and GitLab CI. Partnered on technical SEO and performance improvements raising Lighthouse scores to 90+, and redesigned image delivery with Google Cloud Storage and Cloudflare caching, reducing recurring image-platform costs from about $500 to $100/month.