Senior Full Stack Engineer

We're looking for a Senior Full Stack Engineer to join an established international B2B SaaS product company. You will build features across the stack using Ruby on Rails and React/TypeScript, build and evolve GraphQL APIs, develop and maintain integrations with third-party platforms, own features end-to-end, take part in architecture and refactoring decisions, and work with a mature production system. Strong commercial experience with Ruby on Rails, React + TypeScript, PostgreSQL knowledge, and experience with GraphQL and third-party APIs are required. English B2 and fluent Russian are needed for communication.