About this role
- EN The Netherlands Questions about working at Coolblue? Contact our recruiters via Follow Coolblue: © 1999 - 2026 - Coolblue B.V. Senior Front-end Developer . Rotterdam, Weena 664 32 - 40 hours Higher Professional Education As a Front-End React/Next.js Developer, you will help improve the user experience of our web applications at Coolblue, while being comfortable working across the full stack when needed. This role is primarily front-end focused, with hands-on full-stack expectations including back-end development in TypeScript and C#. What does a Senior Front-end Developer at Coolblue do? As a Senior Front-End React/Next.js Developer, you will take the lead in developing user interface components and implementing them using modern front-end technologies, including React.js and Next.js. Your primary responsibility remains the front end, while bringing a strong full-stack mindset to architectural and technical decisions. You will collaborate with UX Designers to create solutions that deliver high-quality user experiences and present them to the team. You will be involved in critical decision-making around architecture, processes, and tools, and be responsible for ensuring the overall performance and maintainability of the solutions. You will mentor junior and medior developers, provide guidance, and share your knowledge with the team. Would you also like to become a Senior Front-End Developer at Coolblue? Read below if the job suits you. You recognize yourself in the following - You have 5+ years of experience as a Front-End React/Next.js Developer. - You have a BSc or MSc in Computer Science or a comparable field. - You have advanced experience with TypeScript and React.js/Next.js concepts. - You have extensive experience with modern JavaScript (ES2017+), HTML, and CSS/SCSS. - You are highly proficient with React.js and Next.js. - You have experience with a Back-End runtime environment such as Node.js or C# (....