UI Engineer

Why this role exists

We're building a shared UI Framework - the component, theming, state, and API-access layer for our next-generation Building Automation System (BAS) interface, deployed to both edge/on-premises and cloud targets.

This is a fixed-term engagement to add delivery capacity: you'll close a specific set of committed deliverables inside a 6-month window, working alongside our permanent engineers.

Scope of work

• Framework components. Build, extend, and harden reusable React + TypeScript components in our design system, including states, theming/tokens, keyboard interaction, and accessibility behavior.
• Feature surfaces. Implement assigned BAS UI screens and workflows against defined UX designs and REST/streaming APIs, including data fetching, caching, and error/offline/degraded-connectivity states.
• Cross-target correctness. Ensure the same UI runs correctly in both edge/on-premises and cloud-hosted deployments, on supported browsers and screen sizes.
• Test coverage. Write and maintain unit and component tests (Jest/Vitest + React Testing Library) and contribute automated end-to-end coverage for the flows you deliver.
• Performance. Diagnose and fix front-end performance issues - bundle size, render cost, large data-set rendering, memory retention in long-running sessions.
• Defect burn-down. Take assigned defects from triage to verified fix, including root-cause notes.
• Documentation and handover. Leave component docs, usage examples, and decision notes sufficient for the permanent team to own the work after the engagement ends.

Team and delivery model

• You will join an established Agile scrum team as a full member alongside permanent staff.
• Delivery is assessed at team level: sprint commitments, flow of stories to done, and the quality of what the team ships. There is no separate individual scorecard.
• The team runs three-week sprints with backlog refinement, estimation, daily standup, sprint review and demo, and retrospective. Participation in all ceremonies is expected.
• Ramp expectation: development environment operational and a first reviewed pull request merged within your first sprint; contributing to the team's sprint commitment from the second sprint forward.
• Extension or conversion, if it happens, will be considered in the context of the team's outcomes and your contribution to them.

Required qualifications

• 4+ years building production web front ends, with a bachelor's degree in computer science or software engineering, or equivalent demonstrated experience.
• Deep, current TypeScript and React - hooks, component composition, state management, and rendering behavior - plus fluent modern HTML and CSS (responsive layout, theming, CSS-in-JS or CSS modules).
• Demonstrated experience building or extending a reusable component library or design system consumed by more than one application.
• Strong debugging and performance analysis skills using browser developer tools: profiling render cost, tracing network behavior, isolating memory growth.
• Clear understanding of the separation between application code, UI framework, and REST API, and the discipline to keep those boundaries intact.
• Effective in a CI/CD workflow: small pull requests, automated developer tests, trunk-based or short-lived branches, code review as a normal habit.
• Comfortable working across Windows and Linux development environments.
• Agile delivery habits: reliable estimates, visible progress, early escalation of blockers in daily standups and story refinement.

Preferred qualifications

• Accessibility implementation experience against WCAG 2.1 AA, including ARIA patterns and keyboard-only operation.
• Node.js/BFF or .NET/C# back-end familiarity sufficient to debug across the API boundary; Angular experience is also valued.
• Real-time or high-frequency data UIs - WebSocket/SSE, virtualized tables, time-series charting.
• Experience with Chrome and Edge browser extension development, testing, and publishing.
• Building automation, industrial control, IoT, SCADA, or other operational-technology domains.