I'm Yonatan Karp-Rudin, a passionate backend engineer and Staff Engineer at Billie GmbH.
Driven by curiosity and a commitment to clean, reliable backend systems, I specialize in building scalable solutions with Kotlin, Spring, and a toolkit of modern backend technologies.
I love open source and believe in sharing knowledge with the community—whether through code, writing, or open-source contributions.

• 🛠 Primary Focus: Kotlin, Spring Boot, OpenAPI, and JVM-based backend systems
• 🌍 Based in Berlin, Germany (originally from Israel)
• 📝 Blogger, speaker, lifelong learner, and automation enthusiast
• 🐈 Cat person | 🎮 Gamer

• xkcd-click-and-drag: Interactive recreation and data exploration of XKCD's legendary "Click and Drag" comic.
• domain-gateway-demo: Explore the gateway pattern for complex backend domains.
• coffee-machine-simulator: Fun simulation of a coffee machine with a backend twist.
• spring-starter: Jumpstart your Spring Boot projects with this template.
• github-actions: Automation and CI/CD templates for JVM projects.
• xkcd-data-hub: Data aggregation and tools for XKCD fans.

• A contributor to OpenAPI Generator
• Always open to PRs, discussions, and collaboration—let’s build better software together!