Interview Notes — Senior Java Backend

Short, clear theory guides with code examples. Built for fast review and phone reading.

Each file is one topic. Open any .md on GitHub (web or mobile app) — code blocks are syntax-highlighted and readable on a phone.

Topics

Topic	Status
PostgreSQL in 1 hour	✅ done
Java multithreading	✅ done
AWS services (S3, ECS, EKS, MSK, VPC, RDS)	✅ done
Docker	✅ done
React / JS / TS	✅ done
Microservice protocols (Thrift, HTTP/S, SOAP, gRPC)	✅ done
Redis vs Redux	✅ done
Java memory model & JVM tuning	✅ done
SOLID principles	✅ done
CI/CD pipeline (Docker + AWS + GitHub Actions)	✅ done

Legend: ✅ done · 🚧 in progress · ⬜ planned

Format

• Markdown (.md), one file per topic.
• Original .docx drafts are kept locally but not committed (see .gitignore).