Senior Full Stack Developer TypeScript React API

Company: Client Server
Apply for the Senior Full Stack Developer TypeScript React API
Location: London
Job Description:

Overview

As a Senior Full Stack Engineer in our new UK operation, you will own the architecture and build products from the ground up in a fast-growing sports tech environment. You’ll work hands-on across the stack, from design to production, shaping features end-to-end and delivering real-time sports data-driven experiences. This role offers genuine founding ownership and the chance to influence technology decisions in a small, collaborative team.

Pay / Benefits

  • Salary up to £120k
  • Bonus
  • Career growth as the company scales
  • Founding engineering ownership in UK operation
  • London onsite role
  • Hands-on, impactful work

Responsibilities

  • Shape architecture and make technology decisions for the UK operation
  • Build products end-to-end from design through deployment and data reporting
  • Own the full software development lifecycle, including testing and production support
  • Develop across TypeScript, React, backend APIs, and possibly Rust
  • Collaborate in a small, startup-like team to deliver real-time sports data and betting-related features
  • Leverage AI tooling to accelerate development and recommend effective AI usage

Key requirements

  • Strong TypeScript and React experience
  • Backend services and APIs development
  • Knowledge of Rust (preferred)
  • Experience shipping consumer-facing products, ideally D2C subscriptions
  • Comfort owning features from design to release and data reporting
  • Experience in startups or scaling companies
  • Experience with real-time systems, in-play chat, live sports data, or betting tech
  • Familiarity with AI tooling in development
  • Collaboration
  • Problem solving
  • Ownership mindset
  • TypeScript
  • React
  • Backend services and APIs

Posted: September 17th, 2026