Master Java syntax, OOP (the language Java was designed for), collections framework, exception handling, and I/O. This is your foundation.
By the end, you'll be able to
Mini-project
Build a student management system: CRUD operations, search, sorting, file-based storage, and a CLI interface.
Recommended Resources
Baeldung - Java & Spring Tutorials
Baeldung
Java Full Course for Beginners - Bro Code
Bro Code (YouTube)
DSA Bootcamp in Java - Kunal Kushwaha
Kunal Kushwaha (YouTube)
Spring Framework Tutorial - Java Brains
Java Brains (YouTube)
DSA Bootcamp Java - Kunal Kushwaha
Kunal Kushwaha (YouTube)
Level up: multithreading, lambdas, streams, generics deep dive, and the JVM internals every senior developer knows.
By the end, you'll be able to
Mini-project
Build a multi-threaded web crawler that crawls 100 pages concurrently with proper thread pooling and rate limiting.
Spring Boot is the standard for Java backend development in India. Learn dependency injection, auto-configuration, REST APIs, and Spring Data.
By the end, you'll be able to
Mini-project
Build a job portal API with Spring Boot: company profiles, job listings, applications, user auth, and search filters.
Master JPA/Hibernate ORM, database design, and how to write performant queries. Most Java projects use MySQL or PostgreSQL.
By the end, you'll be able to
Mini-project
Design and implement the database for an e-commerce platform: products, orders, payments, reviews with proper JPA relationships.
Large Indian companies run microservices. Learn to break monoliths, design APIs between services, use message queues, and handle distributed systems challenges.
By the end, you'll be able to
Mini-project
Split your job portal into microservices: user-service, job-service, application-service, notification-service. Add an API gateway.
Indian IT companies emphasize testing. Master JUnit 5, Mockito, integration testing, and TDD practices.
By the end, you'll be able to
Mini-project
Add comprehensive tests to your Spring Boot app: unit tests for services, integration tests for controllers, and mock external dependencies.
Containerize and deploy Java apps. Learn Docker, Jenkins/GitHub Actions, and deployment to AWS/Azure.
By the end, you'll be able to
Mini-project
Containerize your microservices, create docker-compose for local dev, and deploy to AWS with a CI/CD pipeline.
Indian tech interviews are DSA-heavy. Practice arrays, trees, graphs, dynamic programming, and system design. This is non-negotiable.
By the end, you'll be able to
Mini-project
Solve 100 LeetCode problems (50 easy, 40 medium, 10 hard). Do 5 mock interviews on Pramp. Apply to 30+ companies.
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