Senior Full Stack Developer TypeScript React API

Client Server Ltd.; Greater London; On-site; GBP 100,000 - 120,000; Full time

Benefits offered by this job

Bonus

Job summary

Client Server Ltd. in London is seeking a Senior Full Stack Developer to join as a founding UK engineer, owning architecture and building products from ground up.

You’ll work with TypeScript, React, APIs, and potentially Rust in a hands-on startup environment, shipping consumer-facing features end-to-end and contributing to data reporting and real-time systems.

Qualifications

• Strong full stack skills including TypeScript, React and APIs; knowledge of Rust preferred.
• Experience shipping consumer-facing products, ideally direct-to-consumer subscription.
• Own features end-to-end from design through release and data reporting in a small team.
• Experience with startups or scaling companies; familiarity with real-time systems and live data would help.

Responsibilities

• Own architecture and make technology decisions; build products from ground up.
• Hands-on development from design to testing, deployment and production.
• Collaborate with team to ship features end-to-end and improve data reporting.

Skills

TypeScript

React

APIs

Rust

Backend services

Tools

AI tooling

Job description

Senior Full Stack Developer TypeScript React API

London, Greater London | £100k - £120k per year

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

Opportunity for a Senior / Founding Full Stack Developer 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 a Senior Full Stack Developer, you'll be one of the first engineers in the UK and will 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