Hi there,
As Filen continues to grow, we're looking for a Senior Full-Stack Developer / Senior Product Engineer to help us scale and evolve our product. You’ll be a key part of a small, agile team, working across the entire stack to build secure, privacy-focused cloud solutions.
Filen is a privacy-first cloud storage platform. Files are protected with client-side, zero-knowledge encryption, which means only the user can access their data. We build and maintain apps for web, desktop, and mobile, with a focus on speed, reliability, and a clean user experience. Our infrastructure is self-hosted in Germany and we keep a strong focus on transparency through open source.
For more information about us and our product, visit filen.io or read our info brochure.
What you’ll do
- Develop and maintain our cross-platform interfaces using React
- Refactor and modernize components to improve speed, usability and accessibility
- Use a diverse set of skills to improve and optimize the performance & design of our products & interfaces
- Collaborate closely with a small, agile team
- Take ownership of projects and features from concept to release
- Drive architecture and code quality (patterns, refactoring, maintainability)
- Be ready to contribute quickly after an fair onboarding period
- Improve performance & UX with measurable outcomes (Core Web Vitals, load times, responsiveness)
What we’re looking for
Must-have
- Several years of production experience
- Excellent TypeScript skills (clean types, refactor-safe code)
- Solid experience with React & React Native, especially hooks and modern component patterns
- Understanding of responsive design and accessible web development
- Knowledge of performance optimization, accessibility best practices, and (testing) tools such as Vitest, Playwright, Maestro
- Ability to work independently, communicate clearly, and deliver end-to-end
Know or be ready to learn:
- React Query (
@tanstack/react-query): comfortable working with queries, mutations, caching, and existing API hooks - Zustand: able to work confidently with global state in an existing codebase
- Electron: familiar with building/maintaining cross-platform desktop apps
- Native mobile development: experience with Kotlin and/or Swift
We don’t care about degrees or certificates. We care about what you can build. If you have GitHub projects, a portfolio or side projects you’re proud of, we’d love to see them.
What we offer
- €60,000 – €100,000 gross/year (full-time, 40h/w), depending on experience and impact. (USD equivalent approx. $69,000–$116,000; subject to exchange-rate fluctuations)
- Full-time employment
- Fully remote within the EU, or you can join us in our office in Germany (Recklinghausen, NRW). If you are outside the EU, we would have to decide on a case-by-case basis.
- Flexible working hours, we focus on results, not clock-in times
- A growing privacy-tech scale-up with lots of freedom and responsibility
- Supportive, straightforward team culture with minimal bureaucracy
- The chance to work on a real product used by hundreds of thousands of users.
- Free snacks and drinks if you drop by the office
What we need from you
- Technical expertise in the above-mentioned technologies
- Experience working in an agile environment as part of a small, dedicated team
- A hands-on mindset and a focus on work that directly impacts end users
- Willingness to tackle complex problems and continuously learn new things
How to Apply
Send us your portfolio of past projects that you are proud of alongside your CV / resume via our Smart Application Tool.
If you have any questions, just reach out via support or social media. We’re happy to chat and look forward to hearing from you.
- The Filen Team