Onlano
ReactOnsite

Senior Front End Engineer - JavaScript & React

Client Server - Recruiter

The City, Central London, ๐Ÿ‡ฌ๐Ÿ‡ง United KingdomFull-time - Senior (4-7 years)0 applicantsCloses Jun 21, 2026

Salary

GBP 85,000 - 85,000 / year

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Job description

Job details

  • Location: The City, Central London
  • Work mode: Onsite
  • Employment type: Full-time (Not an internship)
  • Salary: GBP 85,000 per year

Role overview

Client Server is hiring a Senior Front End Engineer with strong JavaScript and React expertise to join their team in Central London. This role is ideal for developers experienced in start-up or small business environments who embrace AI-assisted development workflows. The position offers a competitive salary of ยฃ85,000 and the opportunity to work on innovative projects using modern front-end technologies.

Job details

This is a full-time, onsite position based in The City, Central London. The role requires strong object-oriented programming skills, proficiency with AI tools like Claude, and a solid foundation in computer science fundamentals including data structures and design patterns. Candidates should be collaborative team players with excellent communication skills who thrive in fast-paced, agile environments.

Responsibilities

  • Develop and maintain complex React applications using modern JavaScript
  • Integrate AI tools like Claude into daily development workflows
  • Collaborate with cross-functional teams to deliver high-quality features
  • Apply OOP principles and design patterns to front-end architecture
  • Participate in code reviews and mentor junior developers

Requirements

  • Strong object-oriented JavaScript and React development skills
  • Experience using AI tools such as Claude in development workflow
  • Proven track record in start-up or small business environments
  • Solid understanding of computer science fundamentals and data structures
  • Excellent communication and collaboration abilities

Benefits

  • Competitive salary of ยฃ85,000
  • Work with cutting-edge AI development tools
  • Central London location
  • Dynamic start-up culture

Keywords

JavaScriptReactFront EndOOPAI ToolsClaudeData StructuresDesign Patterns