Location: Ukraine / Europe-Kyiv

Remote: Yes, remote only. 5+ hours overlap with US Pacific Time.

Willing to relocate: No

Technologies: TypeScript, React, Next.js, Node.js, Fastify, Express, PostgreSQL, Redis, BullMQ, MongoDB, Python, LLM APIs, OpenAI, embeddings, vector databases, structured outputs, evals, prompt versioning, human review workflows, DigitalOcean, Linux, Cloudflare, GitHub Actions, monitoring

Résumé/CV: upon request / LinkedIn: https://www.linkedin.com/in/sasha-tyrba

Email: sasha@sashatyrba.com

Senior full-stack and AI systems engineer with 15+ years of experience building web products, SaaS platforms, infrastructure, and applied AI systems end-to-end.

Recently built an AI research/data-extraction system using LLM APIs, embeddings, structured outputs, evals, prompt versioning, Python automation, and TypeScript backend/frontend pieces. It reduced research workflows from several weeks to ~30 minutes and processed millions of documents.

Before that I was lead engineer for a production e-commerce marketplace, working across frontend, backend, infrastructure, security, reliability, internal tools, and major migrations. I helped move major parts of the platform from JS to TS, MariaDB to PostgreSQL, Heroku/Fly.io to DigitalOcean, Fastly to Cloudflare, SCSS to Tailwind.

I’m usually a good fit for small teams that need someone senior who can take ambiguous product or technical problems and turn them into reliable software. Open to remote contract, fractional, or part-time work.