Senior Frontend Engineer — AI-Powered React/Next.js

James Chase; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Job summary

James Chase is seeking a Senior Frontend Engineer to join a small, high-calibre engineering team in London, hybrid work arrangement.

You’ll work with React, Next.js, TypeScript and AI-assisted engineering practices, owning features end-to-end from design through production, including tests and releases. The role emphasizes autonomy, small iterative changes, and hands-on coding with Claude Code as a core tool.

Qualifications

• Deep commercial experience with React, Next.js and TypeScript.
• Own features beyond the UI and responsibility for production software.
• Treat automated testing as part of development and ship small changes frequently.
• Experience consuming and challenging design systems.
• Work well in small, collaborative engineering teams.

Responsibilities

• Own a complete vertical slice of the customer journey from idea to production.
• Own the application, its backend-for-frontend, tests and releases.
• Prompt effectively and review AI-generated output to improve standards.

Skills

React

Next.js

TypeScript

AI coding tools

Tools

Claude Code

Playwright

Storybook

REST APIs

Job description

James Chase is seeking a Senior Frontend Engineer to join a small, high-calibre engineering team in London, hybrid work arrangement.

You’ll work with React, Next.js, TypeScript and AI-assisted engineering practices, owning features end-to-end from design through production, including tests and releases. The role emphasizes autonomy, small iterative changes, and hands-on coding with Claude Code as a core tool.