Mobile Engineering Lead, iOS & Android

Location: Marylebone

Mobile Engineering Lead (Native iOS & Android), health scale-up Central London - one day per week in the office £110-125k  benefits In this key hands-on role, the Mobile Engineering Lead will lead a small mobile app development team within a rapidly growing health tech scale-up to maintain the existing native iOS and Android apps as well as building a new app for release in 2026.

A seriously strong and challenging opportunity for a Lead Mobile Application Developer to fast track your career, mixing team and technical leadership to help take the native mobile apps to the next level. The Mobile Engineering Lead is a highly visible, technically hands-on role - primarily prototyping, demonstrating and documenting clear patterns then (critically) making sure they are followed. Once a month the role will need to go deep to help the other developers solve a specific problem.

Responsibilities:
Leading the mobile engineering team - currently 4 native developers, all cross-skilled on iOS/Android Maintaining the existing app on iOS / Android . The codebase is native with very strong source code parity (Swift / Kotlin). This app is close to a feature-freeze now, although some small development is inevitable; over 1000 unit tests (basically identical across platforms) Building an entirely new app (release end 2026) .

This is a major company focus for 2026. With a hugely experienced external design team helping to craft this, it will bring in a conversational interface and AI. This will again be native with strong source code parity, but using clean architecture, MVVM / MVI, Swift

UI / Jetpack, latest libraries etc. Using full-page responsive web views where appropriate (e.g. data collection screens, necessarily connected) Taking responsibility for quality and timeliness of all app releases Ensuring source code parity across platforms (as far as possible) Proactively analysing app quality - including UX, performance, maintainability, test coverage, documentation - and driving initiatives to improve Leading technical discussions to the right decisions (democracy of ideas) Leading on all aspects of app testing (automated and manual) Required :
Degree in computer science, maths or other technical subject, or equivalent significant commercial experience Highly skilled in mobile app architecture, with good skills in BOTH native iOS and Android development

Experience of deploying and monitoring native app releases Strong understanding of best practices for development and testing Strong understanding of software design patterns, including UI architectural patterns, particularly in regard to native mobile apps Excellent experience of team leadership Humility and desire to learn from anyone