Senior Full Stack Engineer

ABOUT THE ROLE Join an early-stage healthtech team building AI agents that coordinate logistics for people living with serious chronic conditions. As a senior individual contributor and product-minded engineer, you will help shape the product and engineering practices as the team grows. WHAT YOU'LL DO - Lead greenfield development for enterprise products and deliver related improvements to a consumer-facing application. - Partner with company leadership to shape the product roadmap for the coming months and year. - Build, debug, and evaluate AI agents, including prompt engineering and evaluation harnesses. - Drive work to make the agents secure and enterprise-ready, including SOC 2 and HIPAA compliance. - Mentor engineers, coordinate work, review code, and contribute to hiring as the team expands. WHAT WE'RE LOOKING FOR - Six or more years of full stack engineering experience, ideally in the six-to-ten-year range. - Experience shipping user-facing products from zero to one at an early-stage or high-growth startup. - Proficiency with React, TypeScript, Python, and FastAPI, along with cloud platforms such as AWS or Google Cloud and tools such as Firebase and Firestore. - Production experience with LLMs, including agent orchestration, prompt and context design, tool use, evaluations, guardrails, and observability. - Experience as a founding or staff engineer, technical lead, or mentor to other engineers. - Healthcare or other regulated-industry experience is valuable, as is familiarity with HIPAA or SOC 2. - Strong front-end design skills and familiarity with Figma. COMPENSATION & BENEFITS Base salary: $185,000 to $210,000 annually. Visa sponsorship is not available. LOCATION On-site in Boston, Massachusetts, United States, five days per week. Relocation assistance is not available.