Founding Backend Engineer — Hybrid + Equity

Do Health; Greater London; Hybrid; GBP 90,000 - 140,000; Full time

Job summary

Do Health in London is seeking a Senior Backend Engineer to own major backend features end-to-end, design, build, ship, monitor and iterate in a fast-moving health startup. You will shape architecture with the lead engineer, scale infrastructure across the UK and internationally, build production AI systems and work directly with product, design and clinical teams in a hybrid setup.

You will join a 10-person team with no management layer between you and the work, and you will be judged by what

Qualifications

• 5–8 years of backend experience with strong fundamentals.
• Experience at a startup or scale-up with ownership.
• Architectural thinking with end-to-end systems discussion.
• Track record of shipping reliable systems.
• Comfort with ambiguous decisions.
• Confident use of AI tools in workflow.

Responsibilities

• Own major backend features end-to-end - design, build, ship, monitor, iterate.
• Shape architecture alongside the lead.
• Scale our blood testing infrastructure across the UK and internationally.
• Build production AI systems - personalisation engines that act on longitudinal health data at scale.
• Improve reliability, observability, and the foundations that everything else depends on as the product grows.
• Work directly with product, design, and clinical teams.

Skills

Backend development

System architecture

Observability

Production AI systems

Product collaboration

Tools

TypeScript/Node.js

Go

Kotlin

Python

Job description

Do Health in London is seeking a Senior Backend Engineer to own major backend features end-to-end, design, build, ship, monitor and iterate in a fast-moving health startup. You will shape architecture with the lead engineer, scale infrastructure across the UK and internationally, build production AI systems and work directly with product, design and clinical teams in a hybrid setup.

You will join a 10-person team with no management layer between you and the work, and you will be judged by what