Senior Frontend Engineer (Next.js / React)

LearnWise AI; Madrid; A distancia; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A modern educational technology company based in Madrid is seeking a Senior Frontend Developer to lead the development of high-quality frontend applications using Next.js and React. The ideal candidate has over 8 years of experience, strong knowledge of performance optimization, and a proven track record of creating accessible UIs. This role offers flexible working conditions with the possibility of remote work in the EU.

Servicios

Flexible time off

Home-office budget

Learning stipend

Formación

• 8+ years of building production frontends.
• Deep Next.js knowledge and strong React skills.
• Mastery of browser runtime and performance optimization.
• Proven track record shipping accessible UI.

Responsabilidades

• Ship high-quality frontend apps in Next.js, React, and TypeScript.
• Translate Figma designs into responsive, accessible UI.
• Champion accessibility and own performance optimizations.
• Deploy and monitor apps on Vercel.

Conocimientos

Next.js

React

TypeScript

Accessibility (WCAG 2.2 AA)

English proficiency

Descripción del empleo

About LearnWise AI

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.

Why this role exists

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.

What you will do

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 and 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).

Qualifications

• 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, love for startup pace.

Nice to have

• 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).

How we work

Default to open: write things down, share context early. Small team, big ownership – you’ll own projects end-to-end. Measure, guess, we ship, we instrument, we learn. Quality and speed: we don’t choose—we engineer for both.

Location

Remote is OK; EU is a must-have. Prefer Barcelona, Spain or Amsterdam, Netherlands if you want hybrid/office.

Compensation

Salary competitive (location-adjusted). Flexible time off, home-office budget, and learning stipend.

If you are passionate

... we would love to hear from you! To fast-track your application, please visit and complete the form on this page.