Founding Principal Engineer (m/f/d)

Most labs still count cells under a microscope by hand. It's slow, repetitive, and error-prone. We're replacing that manual work with software.

By combining a standard microscope with a smartphone, we run computer vision models that locate, track, and measure cells automatically in real time. We're starting with semen analysis and expanding to other routine microscopic samples. We're a small, well-funded team in Berlin, founded in 2026.

Our goal is to make automated, reliable diagnostic analysis accessible on any phone connected to a microscope.

We're looking for an engineer who wants to own the whole platform behind a medical product: services, data, infrastructure, security and identity. A first version runs today. The hard part is making it trustworthy enough for clinical use: patient data that stays safe, an audit trail that holds up for years, and a system that recovers when something breaks.

You'll own all of it, working closely with the founders and our CTO.

Own the platform end to end: backend, data, infrastructure and security.

Get it ready for clinical use, and keep it reliable as we grow.

Build identity, access and data handling that clinics and auditors can trust.

Make the architecture calls: what to build now, what to defer, what to cut.

Set the engineering standard and help hire the team that follows.

Platforms you've built and run. You've built backend platforms from scratch and run them in production, throug