Founding iOS Engineer (m/f/d)
Job description
iOS engineer to own the Ferto Health app end to end, turning an iPhone attached to a microscope into a lab instrument with real-time computer vision and precise capture. The role is a founding engineering position in a small Berlin team building a medical device for clinics and labs.
At a glance
- Employment
- Full-time · Employee (employment agreement)
- Work mode
- Hybrid · Berlin, Germany
- Languages
- English
What you'll do
- Own the app end to end, from architecture to release.
- Push the iPhone camera and on-device models to their limits, so every recording is good enough to analyse.
- Design the capture workflow with lab staff, so technicians get it right the first time.
- Spend time in the lab, measure what works, and decide what to build next.
What we're looking for
- Camera depth: built on the iOS camera stack, not just used it: AVFoundation with manual focus, exposure and white balance, and real-time frame processing; knows where the hardware's limits are.
- On-device ML: run models on the phone and made them fast: Core ML and Vision, quantisation, the Neural Engine, profiling with Instruments.
- Apps you've owned: shipped iOS apps in Swift and SwiftUI and owned them in production; designs an architecture one engineer can carry and can explain the trade-offs behind it.
- Product and UX sense: turns a messy real-world workflow into something simple, and tests it with the people who use it.
- Built for real conditions: offline-first, background uploads, interruptions, data protection; the app works when the network doesn't.
- Beyond the app: iOS is your home, but when the app needs it, you read the backend and change an API yourself.
- Correctness: validates with numbers, not by eye; tests are part of the feature; reproduces bugs first and fixes the cause, not the symptom.
- AI-native engineering: coding agents are part of daily work; gives them good context, splits work into reviewable steps, and stands behind every line shipped.
- Ownership: helps shape the roadmap, pushes back on weak ideas, sets own priorities and raises problems early.
- Range: has worked across several companies, stacks or environments.
Nice to have
- Optics or microscopy imaging.
- Apps for professional users: lab, field, clinical or enterprise.
- Regulated environments with audits: medical devices, health, finance.
Benefits
- Ownership from day one: as a founding engineer, part of the company through a virtual share option plan (VSOP).
- You grow with us: as the company grows, your role grows with it.
- Real influence: you decide how we build software, and you shape the engineering team we build.
- A competitive salary.
- A product that matters: a medical device for real clinics, built together with clinicians and lab staff.
- Flexible hours and office days.
- English is our working language; German isn't required.
- We sponsor the EU Blue Card if you're moving to Berlin.
Apply
Direct apply at Ferto Health GmbH
Opens the job posting at Ferto Health GmbH
About Ferto Health GmbH
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.
Mission
Make automated, reliable diagnostic analysis accessible on any phone connected to a microscope.
Key facts
- 2026
- Berlin
- Combines a standard microscope with a smartphone
- Runs computer vision models that locate, track, and measure cells automatically in real time
- Starting with semen analysis and expanding to other routine microscopic samples
- Small, well-funded team in Berlin
- Founded in 2026