Founding iOS Engineer (mfd)

Most labs still count cells under a microscope by hand. Its slow repetitive and error-prone. Were 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. Were starting with semen analysis and expanding to other routine microscopic samples. Were 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.

Were 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. Youll own it end to end together with the founders.

• 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.

• Camera depth. Youve 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 hardwares limits are.

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

• Apps youve owned. Youve 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 doesnt.

• 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. Youve worked across several companies stacks or environments. How you work counts far more than how many years youve done it.

• Optics or microscopy imaging.

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

• Regulated environments with audits: medical devices health finance.

• Ownership from day one. As a founding engineer youre 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 isnt a fully remote role.

• English is our working language. German isnt required.

• We sponsor the EU Blue Card if youre moving to Berlin.