Tsimafei Yefimenka
Senior Full-Stack Engineer — React, Next.js, Node.js, TypeScript
- 8 years of experience
- Łódź, Poland
- Russian — native
- English — B2
- Polish — B1
Senior full-stack engineer with 8 years building scalable web platforms on React, Node.js and TypeScript, about five of them with UK and EU clients. Leads feature delivery, mentors engineers and pushes on performance across FinTech, EdTech and B2B SaaS. Lately works spec-first with AI-assisted tooling and evaluates LLM output for AI labs.
What I'm looking for
- Work format
- Remote within Poland, or hybrid in Łódź and Warsaw
- Contract
- B2B through his own sole proprietorship, or umowa o pracę
- Start
- Available immediately
- Hours
- Europe/Warsaw, can align with US Eastern
Open to senior roles and considering a move to Warsaw. Ready for heavy overlap with US hours during the first months of onboarding. Prefers established companies with a healthy engineering culture.
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