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(Senior) Full Stack Developer

Kiel, Germany, or Remote

Come join our mission to build the open authentication platform for the modern web.

Company Overview:

As one of the core components of most apps, authentication needs to be open and flexible to grow, but at the same time highly secure and extremely user-friendly.

We at Hanko build an open source authentication platform that brings websites and mobile apps everything required for authenticating their users, but takes out all of the complexity for the developer. By being fully committed to open source, we make sure that our customers don't have to manage a supplier, but instead collaborate with us to build a better product for everyone.

We're on a mission to provide developers everything they need on the journey beyond passwords and cumbersome 2FA – towards secure and convenient passkey-backed biometric authentication that just works – for all users, everywhere. Enabling better user conversion and engagement, less support costs, improved account security, and faster product release cycles with less maintenance.

Role: (Senior) Full Stack Developer


  • Help us shape the vision and roadmap and drive the development and deployment of our open-source authentication platform.
  • Work with our engineering team, our open-source community, and our customers.
  • Provide insights and implement solutions that will push the boundaries of our tech stack.
  • Continuously innovate and contribute to our open source initiatives.


  • Minimum 3 years in professional software development.
  • Know your way around major cloud platforms like AWS or Vercel.
  • Prior contribution to open-source projects.
  • Fluent in spoken and written English.


  • Familiarity with Next.js or other modern full-stack frameworks like Nuxt or SvelteKit.
  • Experience with the Go programming language.
  • Solid grasp of authentication & security technologies such as OAuth, OpenID Connect, SAML, or WebAuthn.
  • Willingness to write about work topics or create other content on Hanko's channels.
  • Proficiency in spoken and written German.

What We Offer:

  • An early, leading position in an ambitious start-up, deeply rooted in the open-source ethos.
  • A market-value salary and virtual stock options. Hanko's success is your success.
  • Unlimited PTO - 4+ weeks recommended per year. Work, rest, perform better.
  • A flexible working environment that can be 100% remote.

To be a part of our mission and help us change the landscape of digital authentication, fill out the form below or send your application to Join us in making online experiences more secure and user-friendly for all!

Hanko is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

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