Senior AI Engineer
Ruby Labs
Albania, North Macedonia, Slovakia, Malta, Croatia, Czech Republic, Slovenia, Spain, Bulgaria, Poland, Montenegro, Estonia, Cyprus, Greece, Serbia, Georgia
Workplace: RemoteFull timeFunction: Data Science & Machine LearningSkills: ["Ownership","Responsibility","Engineering quality","Data-driven experimentation","Collaboration"]Own end-to-end delivery of major AI features while ensuring production stability and predictable, high-quality AI outputs. Build and orchestrate agentic, tool-using workflows using MCP-based tool contracts and multi-provider LLM routing via OpenRouter. Drive prompt engineering, LLM experimentation and evaluation with Langfuse, run A/B tests, monitor reliability and performance, and write maintainable TypeScript across the Next.js/Node.js stack with strong testing and release practices.
