FullStackProductEngineer

LTS is seeking a Full-Stack Product Engineer to join a small, senior engineering team applying frontier AI to one of the most consequential legacy systems still running in production today. The mission: build agents that read, translate, and modernize a decades-old codebase that millions of people quietly depend on. The work has executive backing, real users, and a customer who knows exactly what they’re buying. Specifics shared once we’re talking. The team is small by design. Every seat carries unusual leverage, and we hire people who are already deep in this work. We use AI tooling natively — agents in parallel, model as collaborator, no exceptions. What You’ll Do: The Full-Stack Product Engineer takes agent capability and turns it into product. End-to-end feature delivery across the surfaces engineers actually use to do their work — code understanding, code translation, modernization authoring. Pairs tightly with the Principal Designer in code: Designer absorbs visual-heavy surfaces, the Full-Stack Engineer owns logic-heavy surfaces (authoring, review, agent integration). End-to-end feature delivery across the product — code understanding, code translation, modernization authoring, review surfaces. Build the frontend in modern React with a serverless TypeScript backend. Pair tightly with the Principal Designer in code — Designer absorbs visual-heavy surfaces, the Full-Stack Engineer owns logic-heavy surfaces (authoring, review, agent integration). Write specs, ship, watch usage, iterate; close the loop from design through deploy. Push back on a spec you think is wrong before writing the code. Own the product-quality bar across the surfaces you ship — performance, accessibility, polish, and the moment-to-moment feel. Integrate agent output into product surfaces in a way that respects both engineering correctness and user trust. What We’re Looking For: Bachelor’s degree in Computer Science, Engineering, or a related field, plus 5 years of professional full-stack en