About this role
SR Frontend Developer at Winning. Location: Madrid, Madrid, Spain. Role: leading migration, designing rendering, optimizing performance Requirements: 3+ years frontend experience with React, strong TypeScript skills, experience with Next.js/Vite SSR or SPA→SSR migrations, modern build tools, testing frameworks, performance and SEO optimization, and familiarity with CI/CD and cloud deployments. Category: Software Development Seniority: Mid Level Tools: Next.js, React, TypeScript, Vite, Webpack, Turbopack, Jest, React Testing Library, Playwright, Cypress, Node.js, Vercel, AWS, Azure, Lighthouse, Core Web Vitals Commitment: Full Time Workplace: Onsite Languages: Spanish