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