Senior Java Developer

Job Summary :We are seeking a highly skilled and experienced Senior Java Developer to design, develop, and maintain high-performance, scalable backend services. This role requires 6-10 years of professional experience with deep expertise in the Java ecosystem, specializing in building modern microservices architecture using the Spring Framework (Spring Boot). The Senior Developer will be a key contributor to the entire software development lifecycle, ensuring code quality, performance, and reliability for critical enterprise applications.Core Responsibilities :Advanced Java Development & Architecture :- Design, develop, and maintain robust and scalable backend applications using Java (JDK 11 or higher) and the Spring Framework (Spring Boot).- Implement and evolve services within a microservices architecture, ensuring services are secure, resilient, and performant.- Utilize expert knowledge of Object-Oriented Design (OOD) principles and design patterns (e.g., Singleton, Factory, Observer) to write clean, maintainable, and efficient code.- Optimize application performance, scalability, and security through rigorous testing and tuning.Data Persistence and Messaging :- Design and implement data persistence layers using Spring Data JPA/Hibernate with relational databases like PostgreSQL, MySQL, or Oracle.- Write complex, optimized queries using SQL and ensure efficient transaction management.- Work hands-on with message broker technologies such as Apache Kafka or RabbitMQ for asynchronous communication and event-driven architectures.- Experience with NoSQL databases (e.g., MongoDB, Cassandra) is preferred for handling large-scale unstructured data.API Development and Integration :- Design and develop RESTful APIs adhering to best practices, ensuring high performance and comprehensive documentation (e.g., using Swagger/OpenAPI).- Configure and secure APIs using technologies like OAuth2 and JWT (JSON Web Tokens).- Experience with integration patterns and protocols, including consuming and producing data using various formats (JSON, XML).DevOps and Quality Engineering :- Champion Test-Driven Development (TDD) and quality practices, writing comprehensive unit and integration tests using frameworks like JUnit and Mockito.- Utilize Git for source control and participate actively in CI/CD pipeline processes using tools like Jenkins, GitLab CI, or Azure DevOps.- Work with containerization technologies such as Docker and Kubernetes for deployment and orchestration in a cloud environment.Required Skills & Qualifications :- Experience: 6 10 years of professional software development experience.- Core Java: Expert proficiency in Core Java (JDK 11+) and Object-Oriented Programming (OOP) concepts.- Frameworks: Extensive, hands-on experience with Spring Boot, Spring MVC, and Spring Data JPA.- Microservices: Proven experience designing, building, and deploying microservices architecture.- APIs: Expertise in designing and implementing robust, secured RESTful APIs.- Databases: Strong proficiency in SQL and experience with relational databases (PostgreSQL, Oracle, or MySQL).- Testing: Mandatory experience with JUnit and Mockito for unit and integration testing.Preferred Skills:- Messaging: Experience with Apache Kafka or RabbitMQ.- Cloud & DevOps: Hands-on experience with Docker and Kubernetes orchestration.- Cloud Platform: Experience deploying applications on a major cloud platform (AWS, Azure, or GCP).- NoSQL: Familiarity with NoSQL databases (MongoDB, Redis). (ref:hirist.tech)