Do you love helping to shape digital experiences? Do you want to work in an interdisciplinary team that combines technology, design and strategy? Then join us as an Advanced / Senior Front-End Web Developer (all genders)! What we offer. The chance to become part of a large, international agency group: Approx. 350 great employees in Germany, a modern, customer-centric business model and a true New Work environment. As part of MSQ with a further 1500 colleagues, we offer an international perspective with offices and sister agencies in the UK, USA and Asia Flexible working environment: Hybrid or in one of our beautiful offices in Mainz, Ludwigsburg or Barcelona Agile organization: Self-organized teams, extensive onboarding, personal buddy and lots of support from experienced colleagues: inside Work & life balance: job bike leasing, Smart'n'fit weeks, fitness and self-care offers via EGYM Wellpass And of course: modern hardware, well-equipped tool landscape, company pension scheme, further training budget, in-house training, company events, drinks flat rate and good coffee What you do. Development of modern websites and web applications with a focus on usability, performance and accessibility Implementation of responsive interfaces based on ReactJS and Next.js Collaboration on scalable component architectures and clean code structures Integration of headless CMS solutions such as Sitecore, Storyblok or Contentful Close collaboration with UX/UI design, backend and project management in agile setups (Scrum/Kanban) Quality assurance with testing tools such as Jest or Cypress Use of modern development and deployment workflows (e.g. Git, Vercel, Netlify) What you bring along. 4 years of experience as a frontend developer with JavaScript/TypeScript and React Strong sense of ownership, teamwork and solution-oriented thinking Sound knowledge of UX principles, responsive design and accessibility Experience in performance optimization techniques (lazy loading, code splitting etc.) Understanding of cross-browser compatibility and modern web standards Familiar with frontend testing strategies Very good written and spoken German & English skills