Java Kotlin Lead Backend Engineer

• Do you get excited about building scalable cloud-native systems where you define the technical direction,within a very tech savvy engineering environment full of freedom and autonomy?
• Would you love to guide a small, experienced team while also contributing hands-on to a complex software product?
• And do you say yes to a salary up to €95.000,3 days working from home, a modern stack, a permanent contract and a product-focusedrole with societalimpact on millions in Europe?

Then read on! This might just be your next opportunity.

Your Employer: In-house Engineering Team Building the Future of European Mobility

This engineering-firsttech-company recently launched a product with a clear mission: to make public transport smarter, more user-friendly, and accessible, for millions of travelers across Europe. The platform simplifies access to mobility by putting smart technology and intuitive interaction at the cente,removing traditional barriers.

What makes this moment unique: the product is live and on the verge of rolling out across Europe. That means major technical challenges in terms of scalability, security, and interoperability with transit partners. As Lead Backend Engineer, you’ll set the technical direction while directly influencing how millions of people move across borders.

You’ll join a small, close-knit team of senior engineerswith excellent fundamentals and engineering mindset. Together you work on a rock-solid platform. Here, content comes before hierarchy, and quality over speed. Expect autonomy, freedom in architecture decisions, and direct collaboration with product and UX.

Your Role: Java Kotlin Lead Backend Engineer Amsterdam

As Java Kotlin Lead Backend Engineer Amsterdam, you’ll drive the technical development of this mobility platform. You’ll collaborate with product management and UX, mentor a team of engineers, and shape the technical roadmap. At the same time, you’ll remain hands-on in backend and cloud component development.

How do you design a serverless, event-driven architecture that handles millions of check-ins per day? How do you build a secure, scalable backend with minimal latency and maximum reliability? These are the questions you’ll take the lead on.

You’ll work with the latest tools in the JVM stack, cloud-native services, and mobile integrations. You’ll have the freedom to evaluate new technologies, design refactoring strategies, and mentor teammates, all to deliver a scalable, reliable and impactful product ready for European expansion.

• At least 8 years of experience as a Backend developer
• Experience with architectural decisions, scalable backends, and technical mentoring
• Proficiency in Java and/or Kotlin & Spring Boot
• Experience with Docker, Kubernetes, and cloud-native development is a big plus
• Familiarity with MongoDB, CI/CD, and security best practices is a plus
• Knowledge of mobile platform integration (Android) is a plus
• Strong communication skills and ability to bridge product and engineering

• Between €85.000 and €95.000 per year based on experience and impact
• Permanent contract from day one!
• Direct impact on a live product with real societal relevance
• 3 remote work days+ flexible working hours
• Option to work 32, 36, or 40 hours per week
• Excellent pension scheme
• 27 vacation days (two more than average!)
• Top-tier hardware (laptop and phone)
• €35 netmonthly expense reimbursement
• Daily lunch at the office
• Generous training budget