Frontend Developer (React + TypeScript) - Spain (100% Remote)

Frontend Developer (React + TypeScript) Location: (to be adjusted) · Modality: (Hybrid/Remote) · Schedule: Full-time Languages: Native Spanish · B2 English About the role We are looking for a Frontend Developer with React + TypeScript to build accessible, secure, and high-performance interfaces. You will work with testing from day one and styles using Styled Components, following good architectural practices (layered DDD/Hexagonal) and design patterns. Responsibilities Develop SPAs in React (16+ / 18) with TypeScript (strict typing, generics). Write unit tests with Jest + React Testing Library and maintain high coverage. Implement styles with Styled Components and CSS-in-JS best practices. Apply accessibility (WCAG), performance (lazy loading, memoization), and frontend security (OWASP). Collaborate on layered architecture design (inspired by DDD/Hexagonal) and the use of design patterns. Participate in code reviews, definition of standards, and continuous improvement in an agile environment. Requirements (Must-have) 3+ years of experience with JavaScript. 2+ years with TypeScript (including generics, utility types, narrowing). 2+ years with React (familiarity with v16+ and v18, hooks, concurrent features desirable). Unit testing with React Testing Library and Jest. CSS with Styled Components (themes, theming, componentized styles). Native Spanish and B2 English. Plus (Nice-to-have) OOP in frontend (abstractions, SOLID applied to UI). Practical experience with DDD in frontend