Docker & Deployment workflows
Containerization, multi-stage builds, CI/CD pipelines
Cloud Services (Lambda, S3, DynamoDB)
Serverless functions, storage, and NoSQL patterns
PostgreSQL & Database Modeling
Schema design, indexing, relations, and queries
Jest & React Testing Library
Unit and component testing, mocks, and coverage
System Design Fundamentals
Scalability basics: caching, load balancing, queues
Learning a new language (German)
Conversational basics and technical vocabulary
Improving skills in Chess
Tactics, endgames, and opening principles