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 engineering experience; equivalent experience may substitute for the degree requirement. Track record of shipped product features that can be walked through in detail — including how the design changed once real users got their hands on it. Ability to work in a fast-paced, collaborative environment. Senior full-stack engineer; both frontend and backend are part of the daily job. Modern React (hooks, suspense, recent patterns); strong TypeScript fluency. Comfort across a serverless cloud backend: typed RPC, ORM-level work, AWS or comparable. Density of shipped work — recent product features that real users used, with measurable iteration after launch. Pushes back on a spec when wrong; doesn’t wait for permission to ship. Heavy native use of AI tooling: subagents, model as collaborator. Demonstrated experience in a remote work environment. Nice to Have: Prior developer-facing or technical-user-facing products (IDEs, observability tools, internal platforms). Experience visualizing complex graphs or code relationships (call graphs, dependency trees, AST views). Design sense good enough to ship polished UI without a designer on everyday work. Experience pairing with a designer directly in code rather than via Figma handoff. Public open-source work or shipped side projects with visible craft. What’s in it for you? The opportunity to support high visibility federal missions in IT and healthcare A culture that values innovation, growth, collaboration, and quality Access to cutting-edge tools and technologies Comprehensive benefits for you and your family A career path that rewards ambition and performance If you’re ready to push boundaries, sharpen your skills, and join a team that is passionate about building what’s next, we’d love to meet you. Apply today and let’s build a future together! LTS shares salary ranges to promote transparency. Compensation ranges are provided for informational purposes, and final compensation may vary based on experience, skills, location, and role requirements. LTS is committed to offering eligible employees comprehensive benefits that will provide them with options intended to meet their needs and the needs of their family.