Backend Java (+ Frameworks) 90% Groovy 70% Phyton 60% Bash Scripting 55% Microservice Arch. 85% Infrastructure / Tools / Services Kubernetes 80% Helm 80% Docker 85% OpenShift 45% Grafana 65% Prometheus 50% Kibana 65% FileBeat 55% MinIO (S3 Buckets) 70% HashiCorp (Encryption/Descryption/Key Management) 65% Kafka 70% Camunda 50% Form.io 50% CMS FirstSpirit 5.x 90% CI / CD Jenkins 90% GitLab CI/CD 75% Github Actions 80% Azure DevOps 65% Databases / DB-Libraries / DB-Tools PostgreSQL 75% Oracle DB 75% MySQL 75% MongoDB 65% Hibernate / JPA 87% Liquibase 80% Flyway 80% Etcd 60% Elastic Search 50% Redis 55% Build Tools Maven 90% Gradle 70% NPM 78% QS & Testing JUnit 90% ArchUnit 75% Mockito 80% TestContainer 75% SonarQube 85% Identity & Access Management OAuth2 / OpenID 85% KeyCloak 85% LDAP 60% Cloud Computing AWS 80% Azure (IAM, AKS, BlobStor., CosmosDB, Files) 60% IBM Bluemix (Kubernetes, Elastic Search, MongoDB) 50% Frontend JavaScript 50% TypeScript 50% Angular 45% ReactJS 40% HTML 60% CSS 40%