Lucis, a Paris-based health technology platform focused on biological age measurement and preventive care, raised a $20 million (€17.3 million) Series A round led by Singular in May 2026. The investment followed an $8.5 million round raised in December 2025 from General Catalyst, Y Combinator, and individual investors, as reported by Fitt Insider and Longevity.Technology.
Positioning itself as the "Function Health of Europe," Lucis runs biannual 180-biomarker panels tracking hormones, metabolism, and inflammation markers to flag early risk patterns for chronic disease. The company integrates blood-based testing with wearable diagnostic data to evaluate biological aging rather than chronological age.
Scaling an AI Doctor for Preventive Healthcare
Lucis combines diagnostic test panels with an AI doctor agent designed to deliver personalized health insights and actionable clinical protocols. The company currently serves over 5,000 active users across France, the United Kingdom, Ireland, and Portugal while connecting to dozens of laboratory partners.
To expand its clinical reasoning systems, Lucis is hiring a senior AI engineering lead in Paris (€70,000 - €140,000). The role involves designing multi-agent systems, building production-grade retrieval pipelines, and constructing clinical workflows directly with medical advisors.
Operational Leadership and Technical Infrastructure
Lucis was founded in 2024 by CEO Max Berthelot, CTO Baptiste Debever, and co-founder Max Guerois. Berthelot previously served as CEO of PixelMe and held product growth leadership roles at Walkie-talkie and Buffer. Debever, a Central Lille engineering graduate, previously engineered software at Gorgias.
To maintain regulatory standards while scaling technical infrastructure across European jurisdictions, Lucis is hiring a senior Platform engineering specialist in Paris (€60,000 - €140,000). The position requires translating clinical science into reproducible code, building full-stack algorithms, and maintaining compliance with Health Data Hosting (HDS) and GDPR regulations.
Marketing and Executive Operations
As European operations expand, Lucis is filling two core non-technical roles at its Paris headquarters:
- Founders associate (€50,000 - €80,000): Acts as strategic right hand to CEO Max Berthelot, overseeing cross-functional initiatives, managing board materials, and helping execute international growth plans.
- Brand & content manager (€50,000 - €130,000): Manages brand voice, organic channels, and content production across email, blogs, and social platforms for the preventive health product.
Open Roles at Lucis
| Role | Location | Work Mode | Salary |
|---|---|---|---|
| AI engineering | Paris, France | Onsite | €70,000 - €140,000 |
| Platform engineering | Paris, France | Onsite | €60,000 - €140,000 |
| Founders associate | Paris, France | Onsite | €50,000 - €80,000 |
| Brand & content manager | Paris, France | Onsite | €50,000 - €130,000 |
