Senior, Lead & Staff Full Stack Engineers | YC Combinator Healthtech Start-Up | £150K+Equity | TypeScript | 4 Days London

Owen Thomas | B Corp™; Greater London; On-site; GBP 135,000 - 165,000; Full time

Job summary

Owen Thomas B Corp in London is seeking Senior, Lead, or Staff Full‑Stack Engineers to shape and scale healthtech products. You’ll work end-to-end, owning meaningful problems and influencing product direction alongside product and design teams.

You’ll tackle complex challenges, design scalable systems, and raise engineering quality with autonomy and ownership in a fast-paced startup environment.

Responsibilities

• Build and scale reliable, user-focused products.
• Design robust APIs and backend services.
• Improve performance, resilience and usability.
• Integrate modern AI into real-world workflows.
• Shape technical and product decisions.
• Solve ambiguous problems with autonomy.
• Raise the bar for engineering quality across the team.

Skills

Senior/Staff level

Full-stack

Startup/scale-up experience

Product mindset

Distributed systems

Code quality

Job description

Senior, Lead & Staff Full Stack Engineers | YC Combinator Healthtech Start-Up | £150K+Equity | TypeScript | 4 Days London

I am working with a company who are building technology to make healthcare simpler to navigate helping people find the right services, while giving healthcare organisations better tools to manage demand.

I’m looking for Senior or Staff Full‑Stack Software Engineers to help shape and scale their products…

The role

This is a high-ownership position. You’ll tackle complex problems end-to-end, influence product direction and work closely with engineering product and design.

You’ll be trusted to decide what to build, how to build it and how to make it better.

What you’ll do

• Build and scale reliable, user-focused products.
• Design robust APIs and backend services.
• Improve performance, resilience and usability.
• Integrate modern AI into real-world workflows.
• Shape technical and product decisions.
• Solve ambiguous problems with autonomy.
• Raise the bar for engineering quality across the team.

What they are looking for

• 5+ years’ software engineering experience, operating at Senior, Lead or Staff level.
• Strong full-stack skills with a backend focus.
• Experience in a start‑up, scale‑up or similarly fast-moving environment.
• A product mindset and genuine focus on user experience.
• Strong understanding of scalable, distributed systems.
• High standards for code quality, reliability and simplicity.
• Someone who thrives on ownership, autonomy and meaningful problems.

Technology

Experience in healthcare, finance, infrastructure or other high-stakes environments is a bonus but not essential.