Founding iOS Engineer (m/f/d)

Ferto Health GmbH; Berlin; Sur place; EUR 70 000 - 110 000; Plein temps

Avantages offerts par ce poste

VSOP equity

Flexible hours

Office in Berlin

EU Blue Card sponsorship

Résumé du poste

Ferto Health GmbH in Berlin seeks an iOS engineer who loves the camera. Our app turns an iPhone on a microscope into a lab instrument, with on-device models and real-time computer vision, while remaining simple for technicians in busy labs.

You’ll own the app end to end, from architecture to release, push the camera and on-device models to their limits, design the capture workflow with lab staff, and collaborate with the founders to shape the roadmap.

Qualifications

• Experience with iOS camera stack and hardware limits (focus/exposure/white balance).
• On-device ML: Core ML & Vision, quantisation, Neural Engine, Instruments profiling.
• Shipped iOS apps in Swift/SwiftUI and designed architecture that is scalable.
• Product and UX sense: translate real lab workflows into simple software.
• Offline-first design and robust data handling.
• Ability to read backend, change API when needed.
• AI-native engineering practices and reviewable, well-contextualized work.
• Ownership mentality: roadmap input and proactive problem-solving.

Responsabilités

• Own the app end to end, from architecture to release.
• Push the iPhone camera and on-device models to their limits for reliable analyses.
• Design the capture workflow with lab staff for first-time right usage.
• Spend time in the lab, measure what works, and decide what to build next.

Connaissances

Camera depth

On-device ML

Swift & SwiftUI

Production apps

Offline-first

AI-native engineering

Roadmap ownership

Cross-functional work

Outils

AVFoundation

Core ML

Vision

Instruments

Description du poste

About us

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.

The role

We're looking for an iOS engineer who loves the camera. Our app turns an iPhone on a microscope into a lab instrument, and the hard problems live on the device: holding focus on a moving sample, running computer vision in real time, and capturing a recording precise enough for a clinical result. On top of that, the app has to be simple enough for a technician in a busy lab. You'll own it end to end, together with the founders.

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 you bring

• Camera depth. You've built on the iOS camera stack, not just used it: AVFoundation with manual focus, exposure and white balance, and real-time frame processing. You know where the hardware's limits are.

• On-device ML. You've run models on the phone and made them fast: Core ML and Vision, quantisation, the Neural Engine, profiling with Instruments.

• Apps you've owned. You've shipped iOS apps in Swift and SwiftUI and owned them in production. You design an architecture one engineer can carry, and you can explain the trade-offs behind it.

• Product and UX sense. You turn a messy real-world workflow into something simple, and you test 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. You validate with numbers, not by eye. Tests are part of the feature. You reproduce bugs first and fix the cause, not the symptom.

• AI-native engineering. Coding agents are part of your daily work. You give them good context, split work into reviewable steps, and stand behind every line you ship.

• Ownership. You help shape the roadmap, push back on weak ideas, set your own priorities and raise problems early. Nobody has to chase you.

• Range. You've worked across several companies, stacks or environments. How you work counts far more than how many years you've done it.

Nice to have

• Optics or microscopy imaging.

• Apps for professional users: lab, field, clinical or enterprise.

• Regulated environments with audits: medical devices, health, finance.

What we offer

• Ownership from day one. As a founding engineer, you're part of the company through our 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. We work from Berlin and meet in person regularly, up to several days a week. This isn't a fully remote role.

• English is our working language. German isn't required.

• We sponsor the EU Blue Card if you're moving to Berlin.