Do Health is a mobile-first preventative health product built by a small, autonomous team within Voy. We operate as an independent startup with full autonomy and a modern tech stack - but with the backing and resources of an established company. Co-founded by Dr Rangan Chatterjee, we're on a mission to shift healthcare from treatment to prevention.

We’re building an app that combines regular blood tests, longitudinal health data, behaviour-change principles and AI personalisation to help people make better lifestyle decisions over time.

We’re hiring a Senior Backend Engineer as an essential addition to our core technical team.

What you’ll do

• Own major backend features end-to-end.
• Work closely with our lead engineer on architecture and technical direction.
• Make real product and technical decisions.
• Improve reliability, observability and foundations as the product scales.

Who you are

• Have 5+ years of backend experience and strong fundamentals.
• Are very strong in TypeScript.
• Are comfortable with ambiguity and making judgement calls.
• Use AI tools confidently and responsibly (not “vibe coding”).
• Have experience scaling a system to a high volume of users.

You don’t need health expertise and you don’t need our exact stack today. You do need to be autonomous, thoughtful and capable of shipping high-quality work without hand-holding.

This role tends to resonate with people from excellent, fast-moving teams (e.g. fintech, infra or product-led companies), or engineers who’ve tried early-stage startups and want momentum this time.

Practical Details
Location: London
Working pattern: Hybrid, ~3 days per week in person
Voy is an equal opportunity employer.