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# Senior Frontend Engineer

- **Company:** AECOM
- **Location:** Greater London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** HTML, Application Programming Interfaces (APIs), Artificial Intelligence, Automation of Tests, Cascading Style Sheets (CSS), Software Debugging, Software Design Patterns, Interaction Design, Svelte, Software Engineering, Systems Integration, TypeScript, ReactJS, Backend, Webpack, Information Technology, Real Time Data, Front End Software Development, Restful APIs
- **Published:** September 9, 2026
- **Apply:** https://www.collegerecruiter.com/job/2842869906-senior-frontend-engineer

## About the Role

* Proven and demonstrable hands-on experience building production applications with TypeScript (Svelte or React)
 * Degree in computer science, software engineering, or a related technical field or equivalent demonstrable experience
 * Deep understanding of modern frontend architecture, component design patterns, and state management
 * Strong web fundamentals: HTML, CSS, browser APIs, performance, and accessibility
 * Experience consuming and integrating REST APIs and real-time data into frontend interfaces
 * Familiarity with frontend build tooling (Vite, SvelteKit, or similar) and testing frameworks

Preferred Skills

 * Experience writing automated tests (unit, integration, e2e).
 * Familiarity with Python backend services (enough to read, debug, and contribute to APIs you consume)
 * Knowledge of design systems and frontend architecture best practices

## Description

As part of an AI-first engineering team, you will own the frontend experience of our AI-driven products, collaborating closely with AI/ML engineers to bring advanced capabilities to life through polished, high-performance interfaces. You will work primarily with Svelte and React (TypeScript) to build the tools that thousands of engineers use daily, turning complex AI and engineering outputs into intuitive, delightful user experiences.

This is a frontend-focused role. While you will interact with backend services and APIs, the core of your work will be crafting exceptional user interfaces and frontend architecture.

 * Design, build, and maintain rich, interactive user interfaces using Svelte and React (TypeScript), delivering production-grade frontend experiences that surface complex AI and engineering data
 * Collaborate closely with product managers, ML engineers, and backend engineers to define and ship high-impact frontend features end-to-end
 * Translate complex AI and engineering outputs into clear, interactive, and highly usable components with strong attention to UX, performance, and accessibility
 * Own frontend architecture decisions including state management, component design, and design system development
 * Drive technical excellence by improving frontend architecture, performance and bundle optimisation.
 * Take ownership of frontend features from concept to deployment, influencing product direction, interaction design, and technical trade-offs.
 * Build high-performance, interactive 2D and 3D web experiences for complex engineering visualisations


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