Why Lucis

Lucis is building Europe’s first preventive health platform: from blood testing to advanced AI-driven insights and action plan.

We already serve 1000+ of users in 🇫🇷, 🇵🇹 and 🇬🇧 and are integrating with dozens of lab partners.

Team of passionate and tier-1 operators
Backed by YC X25 and a seed round led by tier-1 investors, athletes & operators
A live AI “doctor” agent already shipping actionable protocols every day

We’re a small, ambitious team of repeat founders, biohackers.

We’re growing extremely fast (10% week over week) and scaling to empower more Europeans to take control of their health.

Paris-based and YC-backed (X25), we’re funded by a top-tier global VC, a specialised healthcare fund, athletes, and serial entrepreneurs, including the founders of Airbyte, Strapi, Sqreen, WePay, Plato, Veepee, and Zenly.

Our story - How it started

The role

We’re looking for a full stack software engineer, product-minded, with entrepreneurial DNA and early stage 0→1 experience. It’s a plus if you are passionate about digital health and longevity.

You’ll join as a founding engineer and shape a product that could add healthy years to millions of lives. As the first full-time founding engineer, you will:

Own mission-critical code from day 1, not tickets
Shape product and tech choices that will impact thousand of users, starting with yourself
Solve real-world health data, privacy, and UX puzzles at European scale
Have a unique opportunity to shape the vision and direction of the company

Our culture

We are building fast, for the long term.

Rigor without ego: audits, science, and code deserve the same high bar.
Default to action: small PRs, short feedback loops.
Radical ownership: you break it, you fix it (and write the doc).
Play long games: we’re building a 100-year company to help people live 100 healthy years.

More about the company 🔗