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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
🚀 Featured Projects
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.
An example of how to use OpenAPI, SpringBoot, Gradle and Kotlin to build RESTful API as described in https://yonatankarp.com/how-to-write-robust-rest-api-with-openapi