Position: Senior Java Developer Experience: 2-5 Years Employment Type: Full-time Key Responsibilities: Design, develop, and maintain scalable, high-performance Java-based applications. Write clean, efficient, and reusable code following best practices. Collaborate with cross-functional teams to gather and analyze requirements and deliver end-to-end solutions. Work on APIs, microservices, and system integrations for seamless communication between applications. Optimize application performance, scalability, and reliability. Lead troubleshooting and debugging efforts to resolve production issues and improve system stability. Contribute to system architecture and design discussions to enhance application performance and maintainability. Mentor junior developers and conduct code reviews to ensure high code quality and adherence to standards. Requirements Experience: 2-5 years of experience in Java development (internship experience excluded). Java Development: Advanced Java concepts: Multithreading and Concurrency (e.g., ExecutorService, CompletableFuture). Java Memory Model (JMM) and Garbage Collection tuning. Streams API and Functional Programming. Reflection API and Dynamic Proxies. Java Modules (JPMS) . Enterprise Java : Working with JEE components (Servlets, JSPs, EJBs). Java Messaging Service (JMS) . JavaMail API integration. Java Security : Secure coding practices. Implementation of JWT and OAuth for authentication/authorization. SSL/TLS and certificate handling in Java. Testing : Writing unit tests using JUnit and integration tests with Mockito . Performance testing tools like JMeter . Architecture Design: Design Patterns : Singleton, Factory, Builder, Strategy, Observer, etc. Advanced patterns like CQRS and Event Sourcing. Microservices Architecture : API Gateway design (e.g., Zuul, Spring Cloud Gateway). Inter-service communication with gRPC and REST APIs . Distributed transactions using Saga and Eventual Consistency. Enterprise Application Architecture : Monolithic to Microservices Migration . Layered and Hexagonal Architecture. Application scaling and load balancing strategies. Domain-Driven Design (DDD) : Aggregate root, bounded context, and entities modeling. Integration Patterns : Message Queue Integration (e.g., RabbitMQ, Kafka). File-based processing and FTP integration. Apache Tomcat Expertise: Tomcat Configuration : Customizing server.xml and web.xml. Thread pool and connector configurations for performance tuning. Deployment and Monitoring : WAR and EAR deployments in Tomcat. Performance monitoring using tools like VisualVM and JConsole . Session Management : Sticky sessions and session replication across clusters. Security : Securing Tomcat with SSL certificates. Enabling role-based access and JNDI Realm configuration. Logging and Troubleshooting : Configuring and customizing logging with Log4j or SLF4J . Debugging slow performance or crashes with thread dumps. BeanShell: Introduction to BeanShell : Using BeanShell for dynamic scripting in Java applications. Embedding BeanShell in enterprise applications. Scripting with BeanShell : Running Java code snippets dynamically at runtime. Prototyping and testing Java logic using BeanShell. Integration : Integrating BeanShell with Java servlets and applications. Using BeanShell for configuration scripting in middleware or plugins. Custom Automation : Automating admin tasks in web servers or enterprise systems with BeanShell. Performance Optimization: JVM Optimization: Tuning JVM options (-Xms, -Xmx, -XX flags). Identifying and resolving memory leaks using Java Flight Recorder (JFR) . Database Performance: Query optimization with Hibernate/JPA. Connection pooling configuration using HikariCP . Code Profiling: Profiling tools like YourKit , VisualVM , and JProfiler . Job Type: Full-time Pay: ₹1,207,623.23 - ₹2,098,305.47 per year Benefits: Flexible schedule Health insurance Provident Fund Location Type: In-person Schedule: Day shift Fixed shift Experience: Java: 4 years (Required) Java Spring Boot: 4 years (Required) Work Location: In person
