Location: Ukraine

Remote: Yes

Willing to relocate: No

Technologies: Ruby, Ruby on Rails, PostgreSQL, Sidekiq/Redis, Hotwire, JavaScript, TypeScript, React, GraphQL/REST/Grape, RSpec/Capybara, Python/FastAPI, PyTorch/Hugging Face, LLM APIs (OpenAI, Anthropic), Docker, AWS/DigitalOcean

Resume/CV: https://katatsu12.github.io/

Email: [email protected]

Senior full-stack Rails engineer with 9+ years of commercial work for US and European clients. I put AI features into production SaaS.

Looking for senior IC work on a Rails product, ideally one with LLM or ML features on the roadmap. I can work through an EOR (Deel, Remote) or on a B2B contract, and I overlap with US Eastern mornings.