Senior Front-end Developer (React / Next.Js) Alle potentiële sollicitanten worden aangemoedigd om de volledige functieomschrijving door te lezen alvorens te solliciteren. 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 subtle things it gets wrong, and never shipping code you don't fully understand. AI is a power tool in expert hands here — not a shortcut around expertise. This probably isn't for you if… * You prefer to live in the IDE and would rather not talk to clients.
* You consider AI-generated code "done" when it compiles. xxqafcf
* You've used a lot of frameworks but never gone deep on any of them. If none of those stung, we'd like to hear from you. Salaris: €3.500,00 - €5.000,00 per maand Arbeidsvoorwaarden:
* Aanvullend pensioen
* Budget voor professionele ontwikkeling
* Flexibele werkuren
* Telefoon van de zaak
* Werk vanuit huis Werklocatie: Fysiek
