Senior Frontend Engineer (React & TypeScript)

Description

Job Summary: We are seeking an experienced Frontend Engineer to design and implement complex interfaces, apply modular architectures, and optimize web performance in an innovative environment. Key Highlights: 1. A leading company in digital transformation and at the technological forefront 2. Focused on innovation, sustainable development, and delivering value to customers 3. A responsible, flexible, and adaptable team passionate about technology We are knowmad mood! We are a leading digital transformation company, continuously evolving and at the forefront of technology. We were founded to drive real change through innovation and sustainable development, with a mission to deliver value to our clients and empower our talent. Comprising over 3\.000 creative, digital, and innovative individuals united by a shared purpose and capable of connecting with people worldwide. A responsible, flexible team with high adaptability to our clients’ and the market’s needs, while consistently delivering value, vision, creativity, expertise, professionalism, and passion for technology in every project. The values guiding us toward excellence are collaboration, innovation, commitment, fun, and trust. **What do we value?** At least **5 years of experience as a Frontend Engineer**, having contributed to the development of **complex production web products**, with a high degree of autonomy and technical judgment. Particularly valued: * Solid experience with **React**. * Advanced proficiency in **TypeScript**, including generics and sound type and contract design. * Experience with **state management** (Redux, Pinia, NgRx, or Context API). * Deep understanding of the **component lifecycle** and render optimization. * Experience working with **partial or evolving requirements**. * Ability to collaborate effectively in teams and communicate clearly in demanding technical environments. **What would your responsibilities be?** * Design and implement **complex frontend interfaces** using React or Vue, ensuring quality and maintainability. * Apply principles of **modular and scalable frontend architecture**. * Implement and maintain **automated testing**: + Unit tests (Jest, Vitest) + Component tests (React Testing Library, Vue Test Utils) + End-to-end tests (Playwright or Cypress) * Optimize **web performance** (Core Web Vitals, lazy loading, code splitting, tree shaking). * Collaborate on the evolution of **design systems** and component libraries. * Work within **CI/CD environments**, actively participating in code reviews and quality assurance. * Collaborate closely with product, design, and other technical teams, contributing technical judgment and ownership. **Additionally, we highly value experience and/or knowledge in:** * **Monorepos** (Nx, Turborepo, pnpm workspaces). * **Storybook**, Vite, and modern tooling. * **Technical SEO and accessibility (WCAG)**. * Fluent collaboration with **Figma** and design systems. * Experience with **SSR / SSG** (Next.js, Nuxt). * Knowledge of **DDD or layered architecture**. * A pragmatic mindset focused on **Time to Market**. * Ability to identify bottlenecks and propose **technical improvements or automations**. * Strong **technical and communicative English proficiency**. And with us, you can enjoy: Indefinite-term Contract **100% REMOTE** Internal training and access to certifications. Check our calendar here: https://www.knowmadmood.com/es/talento/formacion Flexible compensation plan (health insurance, transportation, childcare vouchers, meal vouchers) Become a brand ambassador through our friend referral program Refer your friends and earn a bonus! Events, meetups, tech days, talks… and much more! 26 days of leave (22 vacation days, 2 discretionary days, and December 24th and 31st as default holidays) Working hours: 8\.30 AM – 6 PM (flexible) Monday–Thursday; Friday 8 AM – 3 PM; Summer intensive schedule (July and August): 8 AM – 3 PM Stay updated on our news by following us here \-\> knowmad mood *At ***knowmad mood***, we are committed to equal opportunities and respect for diversity. We implement our Equality Plan and the principle of non-discrimination across all our recruitment processes.*