Full Stack Engineer (£70k–£80k + Equity) at high-growth London health-tech startup

Company: Jack & Jill
Apply for the Full Stack Engineer (£70k–£80k + Equity) at high-growth London health-tech startup
Location: London
Job Description:

Job Title

Full Stack Engineer

Salary

£70k–£80k + Equity

Company Description

Fast-growing health-tech startup backed by leading UK investors with £1M ARR

Job Description

Join a lean, high-velocity team of 16 building computer vision technology to eliminate musculoskeletal pain for millions. You will own features end-to-end across a modern Vue.js and .NET stack, collaborating directly with GPs and UX designers to ship clinical logic that reduces patient pain by an average of 34%.

Location

London, UK

Why this role is remarkable

  • Work on a mission-driven product trusted by global giants like Bupa, the NHS, and AXA across 32 countries to solve a leading cause of long-term health issues.
  • High-impact environment where you’ll be the fourth engineer, enjoying massive autonomy and the ability to influence architectural decisions at a critical growth stage.
  • Exceptional culture with a 50:50 gender split, offering meaningful equity, professional development budgets, and a dog-friendly office in the heart of Old Street.

What You Will Do

  • Design and ship complex features like AI data analysis tools and webcam-based pose estimation for real-time movement analysis.
  • Architect scalable systems using C#, ASP.NET Core, and AWS while ensuring seamless frontend experiences with Vue.js.
  • Collaborate with the Clinical Lead and UI/UX designers to translate medical expertise into automated diagnostic tools and exercise algorithms.

The ideal candidate

  • 3+ years of full stack experience with a track record of building complex applications using strongly typed backends and modern JS frameworks.
  • A self-starter who thrives in high-velocity environments, prioritizing shipping value and taking full ownership of features without waiting for detailed specs.
  • Product‑minded engineer with a passion for health‑tech who enjoys working closely with users and cross‑functional teams to improve clinical outcomes.

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Posted: May 15th, 2026