The design patterns that make Spring applications decoupled and testable.

MongoDB or Cassandra are essential for handling unstructured or highly scalable data. 4. System Design, Integration, and DevOps

Theory is insufficient

Learn message brokers like Apache Kafka or RabbitMQ to decouple microservices and handle event-driven architectures.

Basics of Kubernetes (K8s) for managing containers at scale.

: Moves quickly from Object-Oriented Programming (OOP) to advanced multi-threading, JVM memory management, and the Java Collections Framework.