Back End Developer Kotlin

Ready to build and shape the backend of Europe’s leading online auction platform?

Are you passionate about developing robust, scalable microservices that power millions of transactions each year? Do you want to work with modern technologies and make a real impact on how buyers and sellers interact across Europe? If so, we want to hear from you.

At TBAuctions, we believe everything has value — and that includes your code. We're committed to innovation, transparency, and delivering exceptional auction experiences. Our team is diverse, hands-on, and driven by results. We make bold decisions, move fast, and support each other along the way.

What you'll do

As a Server-side Developer, you’ll play a key role in developing and migrating critical backend services for our auction platforms.

• Design, build, and maintain JVM-based microservices that power inventory, listings, bidding, and payment flows.
• Lead the migration of Klaravik’s legacy backend systems into our scalable microservice architecture.
• Collaborate with cross-functional teams across the Netherlands, Germany, Poland, and Sweden.
• Tackle technical challenges hands-on, contribute to architectural decisions, and help define the future of our platform.

What you bring

• Strong experience with JVM languages (Scala, Java) or Kotlin for backend
• Affinity with or interest in functional programming
• Experience with cloud platforms (Azure preferred; AWS or GCP also welcome)
• Familiarity with microservices and distributed, event-driven systems
• Professional proficiency in English

Bonus points if you know

• Kotlin with Ktor and Arrow
• Queue systems like Service Bus, RabbitMQ, or OpenMQ
• Databases such as Azure SQL, Redis, or MongoDB

Don’t meet every requirement? No problem. If you’re motivated and eager to grow, we’d still love to hear from you.

What we offer you 🥳

• Independent and varied role within an entrepreneurial and innovative organization
• Competitive salary
• Good pension scheme
• Bonus scheme (up to 1 gross monthly salary per year)
• 25 vacation days
• Laptop and iPhone
• Training opportunities
• Working in a team of professionals, where hard work is well combined with humor ✨

This is TBAuctions

TBAuctions (TBA) is Europe's leading multi-brand digital auction platform for B2B used goods. We are powered by a diverse and international team of over 1,200 professionals across the Nordics, Benelux, UK and Continental Europe. Our belief that 'everything has value' drives us to innovate through technology, creating more effective and sustainable auction processes. Our culture is based on our core values, which guide every decision we make, from hiring to performance reviews, from day-to-day decisions to key business strategies. We put bidders and sellers first, we take responsibility, we deliver results and we succeed as a team - because we are better together!