Jens O.

I'm an experienced Java developer, in the business for 15 years now. I worked for Start-ups, mid size companies and enterprises over the areas of telecommunication 📱, FinTech 📈, retail, eMobility, logistics🚚, renewable energies and defense. 🔧Often I also do the DevOps task: "You build it, you run it" 🐧Linux is my preferred OS for 25 years now, using it as desktop, on servers or for embedded devices. My main/favorite topics are: ⭐ Test driven development ⭐ Code quality ⭐ Dependency upgrades ⭐ Java version upgrades ⭐ Dependency security audits ⭐ Clean Code ⭐ Code Reviews ⭐ Build automation ⭐ System tests Key Technologies: ✅ Java 8-21 ✅ Spring Boot 2+3 ✅ JPA ✅ PostgreSQL ✅ MongoDB ✅ Kafka ✅ RabbitMQ ✅ Karaf OSGi ✅ Maven/Gradle ✅ Junit 5 ✅ Mockito ✅ AssertJ ✅ Jenkins ✅ GitHub Actions ✅ GitLab CI ✅ SonarQube ✅ Docker ✅ Kubernetes ✅ Cloud