Senior Frontend Engineer (f/m/d)

Please note: This position is based in Berlin. 

Your responsibility

• Build, optimize, and maintain scalable frontend features using React.js and TypeScript

• Write clean, maintainable code with a strong focus on performance, accessibility, and security

• Take ownership of frontend initiatives from conception to deployment, ensuring a high standard of delivery

• Collaborate closely with designers, product managers, and backend engineers to create a seamless user experience

• Participate in frontend architecture decisions and help shape the technical direction of the platform

• Implement and maintain comprehensive unit and end-to-end (E2E) tests to ensure code quality and reliability

• Mentor junior engineers and promote frontend best practices across the team

• Contribute to a consistent and user-friendly platform by working across teams and advocating for design/system coherence

You'll be successful with these skills

• Ca. 5+ years of professional frontend experience , with at least 3 years building production apps in React.js and TypeScript

• Deep knowledge of modern JavaScript (ES6+), strong TypeScript typing, and fluency with HTML5 / CSS3 (responsive & cross‑browser)

• Mastery of contemporary React patterns (Hooks, Context, Suspense, code‑splitting) and component‑driven development

• Hands‑on experience with state‑management solutions such as Redux, Zustand, or Recoil

• Proficiency in automated testing: unit (Jest, React Testing Library) and end‑to‑end (Cypress or Playwright)

• Comfortable with modern build tooling—especially Vite (or Webpack/Rollup)—and optimizing bundle size, caching, and CI/CD pipelines

• Track record of performance tuning (Lighthouse, Web Vitals) and accessibility compliance

• Solid understanding of frontend security (XSS, CSRF, OAuth/OIDC) and browser privacy considerations

• Experience participating in architecture decisions, conducting code reviews, and mentoring junior engineers

• Effective communicator who thrives in agile, cross‑functional teams and collaborates closely with design & product

• Bonus points for familiarity with Storybook, design systems, or Figma

What you get:

• Responsibility meets creativity: At nilo, you’ll actively shape the way we work and bring your ideas to life.

• Your growth, our support: Whether it's training, conferences, or coaching – we support your personal and professional development with an annual development budget.

• Mental strength with our nilo app: Enjoy free access to our nilo app for proactive and preventive mental health support – anytime you need it (incl. family support)

• Workation: Work remotely from anywhere in the EU for up to 90 days per year.

• Hybrid setup: Two in-office days keep us connected, the rest of the week is yours to shape.

• Stay active: Benefit from an Urban Sports Club membership at a discounted rate.

• Share in our success: Take part in our employee stock ownership program (VESOP).

• We’re team players: Look forward to regular team and company events.

• Dog-friendly office: Your four-legged friend is always welcome.

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.

We would like to encourage you to apply even if the technical requirements cannot be met 100%.