Senior Front-End Developer (React/TypeScript)
First seen by Alion on Nov 9, 2026.
We are looking for a Senior Front-End Developer with strong React and TypeScript expertise to join a cross-functional team building an Agentic AI platform. You will own the user-facing part of a product that today runs mostly in a terminal.
Project: a platform for a leading UK energy and utilities provider that makes AI coding agents follow the company’s engineering standards.
Responsibilities:
Design, build and maintain the UI for the standards pipeline, the requirements tool and the evidence record
Create fast, clear sign-off flows for busy reviewers from security, architecture and product teams
Build and maintain a small shared component library, keeping the interface consistent
Collaborate with full-stack developers on the APIs behind each screen
Maintain high code quality and review AI-generated code
Requirements:
5+ years of experience building production front ends
Strong skills in React and TypeScript
Ability to turn a rough sketch into a clean, accessible screen without a designer
Hands-on use of AI coding agents, with careful review of their output
At least 6 hours of overlap with UK working hours
Upper-Intermediate English or higher
Nice to have:
Experience with internal tools or developer-facing products
Diff and code viewers, rich text editors, workflow or approval UIs
What We Offer:
Transparent strategy and thoughtful management that keep everyone aligned
Space for personal growth and career development without limits
A culture of continuous learning: internal courses, workshops, and English classes twice a week
Skill up events where we share experience and stay on top of trends
Competitive perks: flexible schedule, a strong compensation package, support for professional certifications, and generous vacation policy
Team spirit that thrives through regular events, gatherings, and celebrations