Founding Full Stack Engineer

About the company Our client is a fast-growing software company. The role Raydar is recruiting for this role on behalf of our client. Join a very small engineering group as an early hire, working across the front end, back end and infrastructure of a customer-facing software product. You will ship features, diagnose production issues and help set technical standards for future engineers. Expect broad ownership with little prescribed structure. What you'll do - Build and ship features across the full stack, from user interface to backend services. - Develop and refine systems built on large language models, including conversation flow, tool use and voice. - Prototype adaptive interface components and turn ideas into working demos quickly. - Build and maintain an evaluation pipeline that measures output quality and catches regressions. - Investigate production issues by reviewing logs, tracing root causes, rolling back changes and adding tests. - Design infrastructure for versioning and safe previewing of changes before release. - Create low-latency, reliable infrastructure so users get instant responses. - Take on whatever work is needed, including UI fixes, data migration scripts and customer issue debugging. - Help establish engineering culture and practices as the team grows. Requirements What we're looking for - Prior full stack engineering work at a growing software startup that has paying users. - A track record of designing polished interfaces and shipping product features that users directly interact with. - Working proficiency in React and Python. - Hands-on delivery of AI-powered features in production, such as LLM-driven assistants, retrieval pipelines or orchestration layers. - A bachelor's degree in computer science. - Comfort with ambiguity and a strong sense of ownership. - Good product instincts and enthusiasm for turning user feedback into code. - Sound judgment about when work is ready to ship, and the ability to move quickly without creating hidden problems. - Experience running systems that real users depend on, and an understanding of how they fail. - Interest in closing the gap between a demo and a reliable production system through evaluation and iteration. Bonus points - Experience at a sales technology startup. Benefits Compensation and benefits - Base salary: USD 180,000 to 230,000 per year - Equity Location and work model - San Francisco, CA, United States - On-site, 5 days per week in office - Full-time