Senior Mobile Engineer – Do Health

Company: MANUAL
Apply for the Senior Mobile Engineer – Do Health
Location: London
Job Description:

What You’ll Do

  • Own major mobile features end-to-end in our Expo / React Native app, from concept to production.
  • Collaborate closely with product and design to shape UX, technical architecture and delivery strategy.
  • Make product and engineering decisions, not just implement predefined specs.
  • Drive improvements in app performance, reliability and maintainability as we scale.
  • Architect scalable patterns for state management, API integration and offline-first experiences.
  • Champion high engineering standards: testing, observability, code quality and thoughtful reviews.
  • Use AI tools responsibly to accelerate development while maintaining quality and correctness.
  • Ship high-quality features independently, with minimal oversight, in a fast-moving environment.

Who You Are

  • 5+ years of frontend engineering experience with strong software fundamentals.
  • Deeply experienced with TypeScript, React Native and Expo.
  • Takes full ownership of projects and sees them through to measurable impact.
  • Product-minded: cares about UX, user outcomes and craft — not just code.
  • Comfortable operating in ambiguity and making sound technical judgement calls.
  • Pragmatic and execution-focused — you ship, iterate and improve.
  • Experienced in fast-moving consumer startups, scaleups or design-focused teams.
  • Confident using AI tools thoughtfully — accelerating output without compromising engineering quality.

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Posted: April 17th, 2026