First there is technical interview, then HR interview. The technical Interview was about the projects you were working on the technologies that you used, ask about microservices and spring framework modules (security - spring boot - spring data) and basic java design overview like basic data structure and basic design patterns, also an overview about github flow and agile software development process, how to design for a simple project you should specify the layers you will use and how you integrate with 3'rd party using soap or rest. The HR interview there were some questions like why you want to leave your current place and some situations like working under stress and meeting the deadline and dealing with customer situations and handling conflicts with managers or coworkers.

For a senior developer interview focusing on Java and AWS, these five key concepts are essential: 1. **Design Patterns** (in Java) 2. **Microservices Architecture** 3. **AWS EC2** (Elastic Compute Cloud) 4. **Docker & Kubernetes** 5. **CI/CD Pipelines** (Continuous Integration/Continuous Deployment)