Mid-Level Full-Stack Developer (Python + HTLM/JavaScript)

About the Role We are looking for a Mid-Level Full-Stack Developer to join a fast-moving startup client building an AI-based product in the US healthcare. You’ll own features end-to-end: a FastAPI backend and server-rendered, dynamic HTML on the frontend. This is a hands-on role for someone who ships. The team keeps processes light and bureaucracy minimal, and delivery expectations are high. AI-assisted development is central to how the team works, so the candidate needs a strong sense of AI coding. That means knowing how to use AI tools to move fast, and knowing when to question, refine, or reject what they produce. At Vitamin Software , we partner with ambitious companies to build software that solves real-world problems. For this engagement, you’ll be embedded with a startup client working at the forefront of AI products. What You’ll Do Build and maintain backend services and HTTP APIs in Python with FastAPI. Build interactive UI in server-rendered HTML: Jinja templates, HTMX, Alpine and Tailwind. The work is dynamic pages, not a heavy single-page app. Add LLM features through the existing model layer: prompts, structured output, failure cases, and an eval for each prompt you add or change. Use an AI coding tool every day, and review what it writes for correctness, security and fit with the code around it before it is committed. Design PostgreSQL tables and queries, including the ones that have to stay fast. Move slow or multi-step work onto the background worker, Temporal