React Developer Senior / Lead

Company: Client Server
Apply for the React Developer Senior / Lead
Location: London
Job Description:

Overview

In this role you will own the frontend for a core product and lead the architecture of front-end applications. You will work with product and design to deliver accessible, responsive interfaces and integrate with backend APIs and real-time data. As a hands-on Lead React Developer, you’ll set technical direction, build scalable pipelines, and mentor junior developers. This is a growth-focused opportunity in a scale-up, offering influence as the company expands, with a path to senior leadership.

Pay / Benefits

  • salary up to 90k
  • pension
  • potential equity
  • career progression
  • hybrid/remote flexibility

Responsibilities

  • Lead the architecture and development of front-end applications using React
  • Collaborate with product and design to translate requirements into polished UIs
  • Partner with backend engineers to integrate APIs, payment flows, and real-time data
  • Make critical technical decisions on tooling, architecture, and build/release pipelines
  • Mentor junior front-end developers and conduct code reviews to ensure best practices
  • Maintain performance, maintainability, and scalability across web products
  • Stay hands-on with code while guiding the front-end direction

Key requirements

  • Lead or senior Front End Engineer / Developer with advanced React skills
  • Strong knowledge of modern JavaScript / TypeScript
  • Experience with component-driven architecture and state management (Redux, Context API)
  • Experience building responsive, cross-browser, high-performance web apps at scale
  • Ability to own decisions and work in a start-up/scale-up environment
  • Excellent communication and collaboration skills
  • communication
  • collaboration
  • adaptability
  • React
  • JavaScript/TypeScript
  • Redux or Context API

…

Posted: October 10th, 2026