Senior Frontend Engineer

You 9ll be embedded in our engineering team, building the surfaces that clinical operators, carers, and clients rely on every day. Cera is the UK 9s largest home-care provider; what you ship directly affects care delivery at scale.
We 7re rebuilding our technology platform on a modern frontend stack: React 19, TypeScript, TanStack for routing, query, store, and visualisation, Tailwind, real-time Server-Sent Events, and types generated from server contracts. The team is senior, AI-native, and moves fast.

Responsibilities

• Ship the modern stack: React 19, TypeScript strict, TanStack Router, Query, Store, Virtual, dnd-kit, cmdk, Tailwind.
• Wire real-time through SSE and TanStack Query. Live state, no per-feature plumbing.
• Build agent-supervision surfaces alongside operator surfaces. Provenance, override, capture rationale. The UX for a managed agent is a colleague the operator works with, not a chatbot.
• Maintain a coherent design system and interaction grammar. Every product on the platform inherits the shape; new surfaces do not invent one.
• Reduce complexity. The estate has accumulated frontend complexity, multiple stacks, fragmented patterns, and dead paths. We want it gone. Prioritise the simplest path that removes more than it adds when the situation calls for it.
• Push agentic coding. Claude Code, Copilot, Cursor, or whatever ships fastest. Contribute back to the shared toolkit.
• Sit with the business. Operations, clinical, commercial, recruitment. Watch real users use the surfaces and build from what they actually need. Prioritise what users and teams need in practice, not what assumptions suggest.
• Hold quality together. Testing, accessibility, performance budgets, observability.

Qualifications and Skills

We 7re looking for a Senior Front End Engineer who simplifies, ships, and owns their work. Someone who is equally comfortable navigating new platforms and legacy systems within an organisation. From a technology perspective, we are looking for someone who has experience with:

• Strong React 19 and TypeScript strict at senior level. Real command of the type system, not just the syntax.
• Real TanStack experience: Router, Query, Store, Virtual.
• Tailwind plus design-system instinct. You build a token-driven system, not just style components.
• Real-time UI in production: SSE, websockets, live state synchronisation, under load.
• Type-safe API client experience: generated clients, end-to-end types. Handwritten fetches scare you.
• Frontend complexity reduction. You have unwound a sprawling micro-frontend estate, consolidated stacks, killed dead paths, and shipped the simpler version. You can point to what you removed.

Beyond the technical skills, we are looking for:

• AI-native by default. Claude Code, Copilot, Cursor 013 these are already how you work, not tools you 7re evaluating. You can point to what they 7ve unlocked for you.
• Ownership instinct. You see a problem and take it. You don 7t wait to be assigned. Prioritise issues yourself and move them forward without needing handholding.
• Pragmatism. You ship the smallest thing that works, then iterate. Done beats perfect. Prioritise the work that delivers value fastest, then improve it from there.
• Business curiosity. You go find out how the work actually happens, not just how the spec describes it.
• Learning speed. The stack changes. You don 7t get attached to what you learned last year.
• Low ego. You can be wrong, change course, and give credit where it 7s due.

These aren 7t required, but they 7ll make you stand out:

• Regulated industry experience. Health, social care, fintech, or defence.
• High-density operator surfaces. Trading terminals, command centres, clinical dashboards. You understand the design pattern and why it exists.
• LLM-powered UI in production. You 7ve shipped streaming interfaces, citations, provenance, structured-vs-conversational surfaces.
• Accessibility in regulated contexts. WCAG compliance on clinical or high-stakes UIs, not just consumer products.
• Design instinct strong enough to push back on weak product specs.