Java Backend Developer Roadmap

Here’s a comprehensive roadmap of what you should learn to become a Java backend developer:

Resources (Very Useful !!) || Resources for Absolute Beginners

Core Java Fundamentals

• Java syntax and data types
• Object-oriented programming (OOP) concepts
• Exception handling
• Collections framework
• Multithreading and concurrency
• Java 8+ features (lambdas, streams, etc.)

Database Skills

• SQL and relational databases (e.g. MySQL, PostgreSQL)
• NoSQL databases (e.g. MongoDB)
• JDBC for database connectivity
• JPA and ORM frameworks like Hibernate

Web Development Basics

• HTTP protocol
• Servlets and JSP
• Basic understanding of HTML, CSS, and JavaScript

Frameworks and Tools

• Spring Framework (Core, MVC, Boot, Security)
• Build tools like Maven or Gradle
• Version control with Git

APIs and Web Services

• RESTful API design and development
• SOAP web services
• API testing tools like Postman

Testing

• JUnit for unit testing
• Mockito for mocking in tests

DevOps and Deployment

• Containerization with Docker
• CI/CD pipelines (e.g. Jenkins)
• Basic cloud knowledge (AWS, Azure, or GCP)

Advanced Topics

• Microservices architecture
• Message queues (e.g. RabbitMQ, Apache Kafka)
• Caching mechanisms
• Security best practices

Soft Skills

• Problem-solving abilities
• Communication skills
• Ability to work in a team