- Java EE and/or Golang
- Spring, Spring Boot, Spring MVC, Vertx, GraphQL
- Git
- Ability to create unit tests, performance and integration tests (jUnit, jMeter/k6 & Postman/Newman)
- Kubernetes and/or Docker
- NoSQL DB (e.g. Couchbase / MongoDB / Elastic)
- RDBMS (e.g. MySQL / PostgreSQL / MS SQL Server / Oracle)
- HTTP
- Linux/Unix basics
- ToClientat, Netty, Jetty, JBoss, Nginx a plus.