Senior Frontend Engineer

In AECOM’s AI Engineering team your code will directly shape the physical world around us. We build AI-driven technology that revolutionises how infrastructure and buildings are designed and engineered; reducing waste, cutting CO₂, and making the built environment more efficient and sustainable. This is where software has measurable, real-world impact. With our AI Engineering team we’ve created a unique setup: a lean, highly technical team with the speed and ownership of a start up, backed by the scale, resources, and domain expertise of one of the world’s leading engineering firms.  There has never been a better time to be at AECOM. We are leading the industry’s AI transformation, and with our people and technology we deliver excellence and innovate with impact. We invite you to bring your bold ideas and big dreams to solve the world’s most complex challenges. We're one global team driven by our common purpose to deliver a better world. Join us. What You’ll Do 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 Must-Haves - 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