Skills

Where and how much I have used each technology across work, education, and personal projects.

familiar
regular use
heavy / daily use
not used (blank cell)

Technologies grouped by category, showing usage level across work, education, and personal contexts.
Skill	Work	Education	Private
Programming Languages
Java	heavy / daily use	regular use	regular use
JavaScript	regular use	heavy / daily use	heavy / daily use
TypeScript	regular use	heavy / daily use	heavy / daily use
CSS	regular use	regular use	regular use
HTML	regular use	regular use	regular use
SQL	regular use	regular use	regular use
Go			heavy / daily use
Python		familiar	familiar
ABAP		familiar
C		familiar
R		familiar
Bash			familiar
Cypher			familiar
Kotlin			familiar
Rust			familiar
Frameworks & Libraries
Node.js	regular use	heavy / daily use	heavy / daily use
Spring Boot	heavy / daily use		familiar
React	regular use		heavy / daily use
Tailwind CSS	regular use		regular use
Astro			heavy / daily use
Next.js	familiar		familiar
Spring	familiar
Bun			familiar
Express			familiar
FastAPI			familiar
Micronaut			familiar
Quarkus			familiar
Databases & Storage
PostgreSQL	regular use	regular use	regular use
SQLite			regular use
Object Storage	familiar		familiar
Neo4j		familiar	familiar
MongoDB			familiar
SQL Server			familiar
Cloud & DevOps
Git	heavy / daily use	regular use	regular use
Docker	regular use	familiar	heavy / daily use
Kubernetes	regular use		familiar
Jenkins	regular use
OpenShift	regular use
SonarQube	regular use
Linux	familiar	familiar	regular use
GitHub Actions	familiar	familiar	familiar
Prometheus & Grafana	familiar		familiar
ArgoCD	familiar
Azure		familiar	familiar
GCP			familiar
OpenTelemetry			familiar
Architecture
REST	heavy / daily use	regular use	heavy / daily use
Monolith	heavy / daily use	regular use	regular use
Microservice	heavy / daily use	familiar
Vertical Slice	regular use	regular use	regular use
Event-Driven Architecture (EDA)	regular use	regular use
N-Tier	regular use		regular use
Model Context Protocol (MCP)	familiar	heavy / daily use
Service-oriented Architecture (SOA)	regular use	familiar
Monorepo	familiar	regular use	familiar
WebSockets	familiar	familiar	familiar
Hexagonal			regular use
CQRS	familiar
Microfrontend	familiar
Serverless		familiar	familiar
Testing
JUnit & Mockito	heavy / daily use	familiar	regular use
Vitest	regular use		regular use
Jest	regular use
Java Microbenchmark Harness (JMH)	familiar
k6			familiar
Playwright			familiar
Supplementary Technologies
Dynatrace	heavy / daily use
Apache Kafka	regular use
Camunda	regular use
GLSP		heavy / daily use
Langium		regular use
Tools
IntelliJ	heavy / daily use	regular use	heavy / daily use
Claude Code	heavy / daily use	regular use
VS Code	regular use	heavy / daily use	regular use
OpenCode			heavy / daily use
Languages
English	heavy / daily use	heavy / daily use	heavy / daily use
German	heavy / daily use	heavy / daily use	heavy / daily use
Japanese			familiar