Senior Frontend Developer

Senior Front-end Developer (React / Next.js)

We build complex, business-critical software — We have four front-end developers, working across two teams. Where you'd land isn't decided yet — one of those teams, or possibly a new one — but wherever it is, you'll collaborate closely with all of them. You'd be one of our senior front-end voices: not just shipping features, but shaping how we work across the board — the architecture, the standards, the quality bar, together with the rest of the front-end crew. Day to day, you'll work alongside our back-end developers (Python/Django), our product owners, and — often directly — our clients.

This is a role for someone who thinks in systems rather than components, and who cares as much about why something is built a certain way as that it works.

How we work:

A few things we're opinionated about, so you know what you're walking into:

• Quality comes first. We'd rather ship a little later and get it right than ship fast and fragile. On business-critical systems, that's not a luxury — it's the job.
• Depth over breadth. We'd rather work with people who understand their tools deeply than people who collect frameworks. Knowing why Next.js does what it does beats knowing ten libraries shallowly.
• Ownership, not handoff. You own your work into production, not up to the pull request. When something breaks, you're curious about it, not allergic to it.
• Lean by choice. Small teams, short communication lines, and process that earns its place. We work agile with product owners — and we don't add layers for their own sake.

What you'll do

• Design and build modern React / Next.js applications that stay maintainable as they grow.
• Make and defend architectural decisions — and understand the performance consequences of them.
• Set front-end standards, build reusable components, and create patterns with your team
• Work closely with our back-end developers to integrate APIs and business logic cleanly.
• Own quality end to end, including in production: reading logs, tracing issues, and diagnosing incidents together with our DevOps and sysadmins rather than handing them off.
• Improve performance, accessibility, and overall UX across projects.
• Review code, raise the bar, and help good front-enders across our teams become even better — without slowing them down.

What we're looking for

• 5+ years in front-end development, with deep, current React and TypeScript experience.
• Real production experience with Next.js — you understand rendering strategies (SSR / SSG / ISR / CSR), hydration, routing, and when to use which, not just how to scaffold an app.
• A strong grasp of front-end architecture: component design, state management, and how structural choices affect maintainability, bundle size, and runtime performance.
• The ability to measure and improve performance (Core Web Vitals, bundle analysis, profiling) — and to understand the cost of the trade-offs you make.
• Solid experience integrating front-ends with APIs and back-end systems.
• Comfort across the full lifecycle: version control, testing, debugging, CI/CD, deployment, and maintenance.
• Excellent English and the confidence to work directly with product owners and clients.
• Senior judgment: you know when to be rigorous and when to be pragmatic, you take ownership of outcomes, and you make the people around you better.

Nice to have: Python/Django and SQL (you'll work closely with our back-end teams), real depth in accessibility, a good design sensibility, or experience setting standards within a team.

How we think about AI

We use AI tools in our work and we intend to be genuinely good at it — but quality is non-negotiable, and it always comes first.

We want someone whose own understanding is deep enough to use AI as an accelerator without ever outsourcing judgment to it: reviewing and directing AI-generated code as critically as you'd review a junior's pull request, catching the sub