Founding Principal Engineer, Ferto Health GmbH

Berlin, Berlin, Germany

You own the platform behind our medical device: backend services, data, infrastructure, security and identity. A first version runs today. The work is to make 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 work closely with the founders and our CTO.

How Python is used: the backend, the analysis that turns detections into a result, and our infrastructure scripts are Python. You write mostly Python, plus PostgreSQL and OpenTofu.

What you'll do:

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.

What we offer: a founding role with a virtual share option plan (VSOP), a competitive salary (we share the range in our first conversation), and flexible hours. We work from Berlin and meet in person regularly, up to several days a week. English is our working language; German isn't required. We sponsor the EU Blue Card.

To apply, send your CV to [email protected]. Tell us where you're based and whether you need a visa to work in Germany.

You've built backend platforms from scratch and run them in production, through outages, data incidents, migrations and growth.

Database depth: indexing, locking, transactions, replication, zero-downtime schema changes, and backups you've actually restored.

Security by default: authentication and authorisation, tenant isolation, secrets, audit logging.

Identity: identity providers, sessions and tokens, roles and permissions, onboarding and offboarding.

Infrastructure as code, containers, Linux, networking and cloud are everyday tools for you.

Coding agents are part of your daily work, and you stand behind every line you ship.

Nice to have: regulated environments with audits (medical devices, health, finance), and serving ML models in production.