Plan in 1 month

Preparation plan

1. Java Language and Core Concepts:

   • Advanced topics in Java programming language (generics, collections, etc.).

     • notify vs notifyAll

     • hashCode() and equals() contract

     • syncronized method is synchronised on this

     • List contravarience and varience

   • Multithreading and concurrency in Java.

     • data race vs race condition

     • https://www.baeldung.com/java-thread-lifecycle

     • https://www.baeldung.com/java-lang-thread-state-waiting-parking

   • Java memory management (Garbage Collection, memory leaks, etc.). https://docs.oracle.com/en/java/javase/17/gctuning/index.html

   • Design patterns and best practices in Java.

     • Double-checked locking

     • Active Object

     • Pretty much all of the patterns from the Design Guru

2. Databases

   1. 
   2. ACID is an acronym that refers to the set of 4 key properties that define a transaction: Atomicity, Consistency, Isolation, and Durability.

   3. 'Object-Relational Impedance Mismatch' (sometimes called the 'paradigm mismatch') is just a fancy way of saying that object models and relational models do not work very well together

   4. Hibernate basics

   5. Hibernate lifecycle

      

3. Advanced AWS Services:

   • AWS Lambda

   • AWS DynamoDB

   • AWS ECS

4. Microservices Architecture:

   • Spring

     • How to inject runtime prototype: @Lookup or Provider<> injection

   • Principles of microservices architecture.

   • Service discovery and communication (RESTful APIs, gRPC, messaging queues).

     • Idempotence - when the same action leads to the same result. Safety means that sending a request will not change the state of the server or the resource at all

       
   • Containerization (Docker) and orchestration (Kubernetes).

   • Monitoring and logging for microservices.

5. System Design and Scalability:

   • Designing scalable and fault-tolerant systems.

   • Load balancing and caching strategies.

   • Horizontal and vertical scaling.

   • Database sharding and replication.

6. DevOps and CI/CD:

   • Continuous Integration and Continuous Deployment practices.

   • Jenkins, GitHub CI

7. Performance Optimization:

   • Profiling and debugging Java applications.

   • Performance tuning of JVM.

   • Optimizing database queries and indexing strategies.

8. Security Best Practices:

   • Securing APIs and data in transit.

   • Encryption mechanisms.

   • OWASP Top 10 vulnerabilities and mitigation strategies.

9. Soft Skills and Leadership:

   • Communication skills and ability to mentor junior developers.

   • Problem-solving and decision-making skills.

   • Experience in leading and managing technical projects.