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Senior Frontend Engineer (Next.js / React)
Descripción de la vacante
A forward-thinking AI startup is seeking a Senior Frontend Developer to lead the creation of high-quality production apps using Next.js and TypeScript. This role emphasizes performance, accessibility, and collaboration in a fast-paced environment. Candidates should possess over 8 years of frontend experience, a deep understanding of modern web technologies, and a commitment to inclusive design. The position allows for remote work within the EU, with a preference for Barcelona or Amsterdam.
Servicios
Formación
- 8+ years building production frontends.
- Deep Next.js knowledge and strong React + TypeScript fundamentals.
- Mastery of the browser runtime including event loop and concurrency.
- Proven track record shipping accessible UI.
- Professional fluency in English (written & spoken).
Responsabilidades
- Ship high-quality frontend apps in Next.js and TypeScript.
- Translate Figma designs into responsive UIs.
- Champion accessibility across components.
- Optimize data loading and performance.
- Document decisions and maintain dependencies.
Conocimientos
We’re an AI-first scale up helping universities and colleges support students and faculty with smart, knowledge-driven tools from AI tutoring to feedback and support. Small team, high ownership, real user impact.
We need a senior who can take product ideas from Figma to fast, accessible, production apps on Vercel - and lead the craft on performance, and accessibility.
- Ship high-quality frontend apps in Next.js, React and TypeScript (App Router & Page Router, SSR / SSG / ISR, middleware, edge patterns).
- Translate Figma designs into responsive, accessible UI; iterate quickly with design & product.
- Champion accessibility to WCAG 2.2 AA across components and flows.
- Own performance: optimize data loading / streaming, reduce bundle size, profile the JS event loop and async flows.
- Keep dependencies lean and healthy; document decisions; raise the bar through reviews.
- Deploy, preview, and monitor apps on Vercel (analytics, error tracking, observability).
- 8+ years building production frontends.
- Deep Next.js knowledge (App vs Page routes) and strong React + modern TypeScript / JavaScript fundamentals.
- Mastery of the browser runtime: event loop, promises, concurrency, streaming.
- Proven track record shipping accessible UI to WCAG 2.2 AA.
- Professional fluency in English (written & spoken).
- Bias to action, comfort with ambiguity, and love for startup pace.
- Built streaming UIs, chat experiences, or AI-powered apps (real-time, RAG, agents).
- Experience with design systems, motion / interaction details, and component libraries.
- Tooling for performance & observability (Web Vitals, Lighthouse, bundle analysis).
- Default to open: write things down, share context early.
- Small team, big ownership: you’ll own projects end-to-end.
- Measure >
- Quality and speed: we don’t choose—we engineer for both.
- Remote is OK; EU is a must-have.
- Prefer Barcelona, Spain or Amsterdam, Netherlands if you want hybrid / office.
- Salary: competitive (location-adjusted).
- Flexible time off, home-office budget, and learning stipend.
If you are passionate about creating intuitive, engaging user interfaces, interested in working for a startup, and excited about the opportunity to work on innovative AI projects that make an impact for students just like you, we would love to hear from you!
To fast-track your application, please visit and complete the form on this page.
* El índice de referencia salarialse calcula en base a los salarios que ofrecen los líderes de mercado en los correspondientes sectores. Su función es guiar a los miembros Prémium a la hora de evaluar las distintas ofertas disponibles y de negociar el sueldo. El índice de referencia no es el salario indicado directamente por la empresa en particular, que podría ser muy superior o inferior.