Senior Ruby on Rails Developer (LLM)

OnTheGoSystems is a remote team of tech enthusiasts, innovators, creatives, and engineers. We work together to harness the power of translation technologies and allow businesses of all sizes to go global. From algorithms and AI to machine learning, we create cutting-edge, affordable tools that make an impact.

• Strong professional experience with Ruby on Rails, ideally at senior level
• Experience building and running production systems for real customers
• Strong backend skills including databases, API design, performance, background jobs, and security
• Ability to break down ambiguous problems and propose practical technical solutions
• Hands-on interest or experience with AI/LLM technologies
• Good judgment about when to use AI versus simpler engineering approaches
• Strong testing habits and care for long-term code quality
• Responsible, curious, and flexible mindset; willing to debug, deploy, investigate, learn, and own outcomes

Nice to have:

• Experience with React
• Experience with CI/CD, background jobs, or AWS
• Experience building AI-powered product features in production
• Familiarity with embeddings, vector search, RAG, evals, or LLM observability
• Experience with text-processing, localization, translation, or multilingual products

• Owning features from technical design through production
• Building and maintaining Ruby on Rails systems used at scale
• Designing AI/LLM-assisted features and workflows to enhance product quality and user experience
• Working with LLM APIs, prompts, retrieval/context strategies, and AI-assisted development tools
• Making trade-offs around performance, reliability, cost, latency, security, and maintainability
• Writing and maintaining automated tests including unit, integration, and E2E tests
• Debugging production issues and improving system reliability