Java Roadmap
The Java Backend Developer roadmap follows a main path: Computer Science → Java Core → Build Tools → Database → Backend Development → Spring Ecosystem → Security → Testing → Architecture → DevOps. Each step builds the foundation for the next, designed for developers building a Java backend career.
Computer Science
Computer science foundations: OS, Networking, Data Structures, Algorithms. Essential knowledge before diving into Java.
Java Core
Java core: OOP, Collections, Exception, Stream API, Concurrency, JVM. Master the Java language before learning frameworks.
Build Tools
Build tools and dependency management. Maven and Gradle are the standard in the Java ecosystem.
Database
Database knowledge: SQL, Database Design (ERD, Normalization, Indexing), Transaction, Isolation level, Query optimization, Connection pooling. RDBMS (MySQL, PostgreSQL), Caching (Redis), NoSQL (MongoDB).
Backend Development
Backend development skills: REST API, Validation, Logging, Exception Handling, Pagination, Caching, File Upload, Email.
Spring Ecosystem
Spring ecosystem: Spring Boot, Spring MVC, Spring Data JPA, Spring Security, Spring Cloud.
Security
Application security: JWT, OAuth2, SSO, 2FA, RBAC (Role-Based Access Control).
Testing
Testing: JUnit, Mockito, Integration Test. Ensure code quality.
Architecture
Architecture: Monolith, Clean Architecture, DDD (Domain-Driven Design), Microservices. System Design and Distributed Systems before choosing Microservices.
DevOps
DevOps & Cloud: Git, Git Workflow, Docker, Kubernetes, CI/CD, Cloud (AWS), Monitoring. API Gateway, Service Mesh, Message Queue (Kafka, RabbitMQ).
