Senior Full Stack Engineer - Start-up

Client Server; Greater London; On-site; GBP 108,000 - 132,000; Full time

Benefits offered by this job

Bonus

Job summary

Client Server in London is seeking a Senior Full Stack Engineer to own features end-to-end using TypeScript, React, APIs, and potentially Rust. This is a hands-on, founding-engineer level role in a fast-growing startup environment.

As one of the UK’s first engineers, you’ll shape architecture, drive technology decisions and help build products from ground up, with a clear path to impactful growth and a salary up to £120k plus a bonus.

Qualifications

• Strong full stack software engineering skills with TypeScript, React and APIs.
• Experience shipping consumer facing products, ideally subscription models.
• Comfortable owning features end to end in a small team and contributing to architecture.

Responsibilities

• Own features end to end from design through release and data reporting.
• Shape architecture and make technology decisions as a founding engineer.
• Collaborate across product, data and engineering in a startup environment.

Skills

TypeScript

React

Rust

APIs

Full stack

Tools

Backend services

APIs

Job description

Senior Full Stack Engineer / Developer (TypeScript React API Rust) London onsite to £120k

Opportunity for a Senior / Founding Full Stack Engineer to join a fast growing sports technology business as it establishes its new UK operation.

The company sits at the intersection of sports, data, digital insights and betting, working across major US sports including the NFL, NBA, baseball and hockey, with further expansion into college football underway.

As one of the first engineers in the UK, you'll have genuine founding engineer ownership - shaping architecture, making technology decisions and building products from the ground up. This is a hands-on role for someone who thrives in a start-up environment and is comfortable owning the full software development lifecycle, from design and development through to testing, deployment and production.

Location:

You’ll join a small team in an attractive area of London on a fulltime basis (Monday to Friday).

About you:

• You have strong full stack software engineering skills: including TypeScript, React, backend services and APIs - ideally you'll also have some knowledge of Rust
• You have experience shipping consumer facing products, ideally direct-to-consumer subscription experience
• You're comfortable owning features end to end, from design through release and data reporting, in a small team environment
• You've used AI tooling to accelerate development and can make recommendations to the team on effective ways to use AI in development
• You're collaborative with strong problem solving skills
• You have experience of working in start-ups / scaling companies
• Experience building real-time systems, in-play chat, live sports data or betting related technology would be particularly relevant

What's in it for you:

• Salary to £120k
• Bonus
• Impactful with excellent career growth as the company scales