Senior Full Stack Engineer - Start-up

Client Server; Greater London; On-site; GBP 72,000 - 120,000; Full time

Benefits offered by this job

Bonus

Job summary

Client Server is seeking a Senior Full Stack Engineer / Developer (TypeScript, React, API, Rust) for a London onsite role, offering up to £120k. You will join early in the UK operation and drive architecture decisions while owning the complete software lifecycle in a startup-like environment.

You will work in a small London team shipping consumer-facing products, leveraging AI tooling to accelerate development and delivering data-driven outcomes with end-to-end ownership.

Qualifications

• Strong full stack skills: TypeScript, React, backend services and APIs; knowledge of Rust is a plus.
• Experience shipping consumer-facing products, ideally direct-to-consumer subscriptions.
• Own features end-to-end from design through release and data reporting in a small team.
• Experience using AI tooling to accelerate development and to suggest effective AI usage.

Responsibilities

• Own features end-to-end from design to release and data reporting.
• Collaborate in a small team to shape architecture and build products from ground up.

Skills

TypeScript

React

APIs

Rust

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