Junior Full stack Engineer
Summary
Junior full-stack engineer (on-site, London) at a YC-backed health-tech startup building a knowledge graph of 9M+ US healthcare professionals for pharma teams. You'd own pieces of data infrastructure and product, working hands-on with Python, SQL, MongoDB, TypeScript, React, and LLMs in production pipelines.
Junior Full Stack Engineer – Health-Tech Startup (YC-Backed)
London | ON SITE | Permanent
We're hiring on behalf of a fast-moving, YC-backed health-tech startup building a knowledge graph connecting over 9 million US healthcare professionals, turning fragmented data into real-time signals for pharma teams.
This is a role for someone early in their career who's already built something real, whether that's a side project, an open-source tool, a hackathon win, or your own product, and wants to keep building at pace with a small team that gives you real ownership from day one.
What you'll do
- Own real pieces of data infrastructure and product from an early stage
- Work through messy, ambiguous problems: a confusing data source, an unclear requirement, something that just needs solving. You'll work out what "good" looks like and build it
- Get hands-on with Python, SQL, MongoDB, TypeScript, React, and LLMs in production pipelines
What we're looking for
- Evidence you can learn and build fast: a strong personal project, competitive performance, research, or work well beyond your level. We care about the evidence, not where it came from
- You've taken something from an idea to something real, used, depended on, or running in production. Not just coursework
- Genuine appetite for ambiguity, messy data, and early-stage pace
- Comfortable in a small, fast-moving team with real responsibility from the start
Nice to Have
- Background in bio-pharma, healthcare data, or life sciences
- Prior experience as a founding engineer or early technical hire at a startup
