Senior Frontend Engineer (f/m/d)

<p>Please note: This position is based in Berlin. <br/></p><p>🚀<strong> Your responsibility:</strong><strong><br/></strong></p><ul> <li>Build, optimize, and maintain scalable frontend features using React.js and TypeScript</li> <li>Write clean, maintainable code with a strong focus on performance, accessibility, and security</li> <li>Take ownership of frontend initiatives from conception to deployment, ensuring a high standard of delivery</li> <li>Collaborate closely with designers, product managers, and backend engineers to create a seamless user experience</li> <li>Participate in frontend architecture decisions and help shape the technical direction of the platform</li> <li>Implement and maintain comprehensive unit and end-to-end (E2E) tests to ensure code quality and reliability</li> <li>Mentor junior engineers and promote frontend best practices across the team</li> <li>Contribute to a consistent and user-friendly platform by working across teams and advocating for design/system coherence</li> </ul><p> </p><p>👀<strong> <strong> You'll be successful with these skills:</strong></strong><br/></p><ul> <li><strong>Ca. 5+ years of professional frontend experience</strong>, with at least 3 years building production apps in React.js and TypeScript<br/></li> <li> Deep knowledge of modern JavaScript (ES6+), strong TypeScript typing, and fluency with HTML5 / CSS3 (responsive &amp; cross‑browser)<br/></li> <li> Mastery of contemporary React patterns (Hooks, Context, Suspense, code‑splitting) and component‑driven development<br/></li> <li> Hands‑on experience with state‑management solutions such as Redux, Zustand, or Recoil<br/></li> <li> Proficiency in automated testing: unit (Jest, React Testing Library) and end‑to‑end (Cypress or Playwright)<br/></li> <li> Comfortable with modern build tooling—especially Vite (or Webpack/Rollup)—and optimizing bundle size, caching, and CI/CD pipelines<br/></li> <li> Track record of performance tuning (Lighthouse, Web Vitals) and accessibility compliance<br/></li> <li> Solid understanding of frontend security (XSS, CSRF, OAuth/OIDC) and browser privacy considerations<br/></li> <li> Experience participating in architecture decisions, conducting code reviews, and mentoring junior engineers<br/></li> <li> Effective communicator who thrives in agile, cross‑functional teams and collaborates closely with design &amp; product<br/></li> <li> Bonus points for familiarity with Storybook, design systems, or Figma<br/></li> </ul><p> </p><p>🤩<strong> What you get:</strong><br/></p><ul> <li><strong>Responsibility meets creativity:</strong> At nilo, you’ll actively shape the way we work and bring your ideas to life.</li> <li><strong>Your growth, our support:</strong> Whether it's training, conferences, or coaching – we support your personal and professional development with an annual development budget.</li> <li><strong>Mental strength with our nilo app:</strong> Enjoy free access to our nilo app for proactive and preventive mental health support – anytime you need it (incl. family support)</li> <li><strong>Workation:</strong> Work remotely from anywhere in the EU for up to 90 days per year.</li> <li><strong>Hybrid setup:</strong> Two in-office days keep us connected, the rest of the week is yours to shape.</li> <li><strong>Stay active:</strong> Benefit from an Urban Sports Club membership at a discounted rate.</li> <li><strong>Share in our success:</strong> Take part in our employee stock ownership program (VESOP).</li> <li><strong>We’re team players:</strong> Look forward to regular team and company events.</li> <li><strong>Dog-friendly office:</strong> Your four-legged friend is always welcome.<br/><br/></li> </ul><p><br/><em>nilo embraces diversity. We strive to create an inclusive workplace where everyone feels welcome, psychologically and physically safe. All applicants will be considered for employment without regard to different ethnic/racial origins, age groups, religions/ideologies, sexual orientations, gender identities, abilities, socio-economic statuses, educational backgrounds, family arrangements and/or any other characteristic. </em></p><p>We would like to encourage you to apply even if the technical requirements cannot be met 100%.<em></em><em><br/></em></p>