Java Developer

Role & responsibilities

Core Java Skills :

• Object-Oriented Programming (OOP) principles (Encapsulation, Inheritance, Polymorphism, Abstraction)
• Data types, operators, control flow
• Exception handling
• Collections framework
• Generics and Type Safety
• Lambda expressions and Functional Interfaces
• Java concurrency and multithreading
• Java I/O (Input/Output) and NIO (Non-blocking I/O)

Java Development Frameworks & Libraries:

• Spring Core
• Spring Boot
• Spring MVC
• Spring Security (authentication, authorization)
• Spring Cloud (microservices, service discovery, configuration)
• Apache Kafka / RabbitMQ / JMS (for messaging and event-driven architectures)
• Junit / TestNG (Unit Testing frameworks)
• Mockito / PowerMock (for mock testing)

Web Development Technologies:

• Servlets & JSP
• RESTful APIs / Web Services (using frameworks like Spring REST, Jersey, etc.)
• JSON & XML Processing (Jackson, Gson, JAXB)
• Ext JS/ React/ jQuery [Non mandatory]

Databases :

• Strong knowledge of relational databases like MySQL, PostgreSQL, Oracle, or MS SQL Server
• Writing efficient SQL queries and joins
• Indexing, query optimization, and database normalization
• JDBC (Java Database Connectivity)

Build and Dependency Management Tools :

• Maven (for dependency management and project building)
• CI/CD (Continuous Integration/Continuous Deployment): Jenkins or any tool

Must-Have/Should Have Skills :

• Core Java/Spring Boot/Microservices/Oracle or MySQL database

Nice to Have Skills :

• React JS/Angular JS/Ext JS/jQuery and any integration experience