Adopted Agile (SCRUM) methodologies for the J2EE project’s SDLC using Spring Boot and Maven for streamlined configuration and deployment. Designed and implemented microservices architecture with Spring Boot, utilizing Spring MVC, Spring Data, and Spring Security for key business logic and web application development. Integrated Spring Boot Data JPA for simplified database operations, proficiently handling PostgreSQL and MongoDB, and applied Hibernate ORM to map data from MVC to relational models, reducing data retrieval time by 20%. Leveraged Java 8, 11, and 17 features including API stream, Collection API, Lambda Expressions, and Multi-threading for asynchronous communication. Developed RESTful APIs for seamless backend communication and maintained front-end components with React JS, utilizing Bootstrap for responsive design and React Router for nested views and routing, enhancing user experience by 15%. Conducted unit and integration testing using JUnit, Mockito, and Cucumber, and used Swagger for API documentation and Postman for testing, resulting in a 40% reduction in bugs. Utilized IntelliJ IDE for development and Apache Tomcat for deployment, managed version control with Git, and tracked bugs and tasks using JIRA, ensuring timely project completion. Developed and maintained detailed documentation for production support processes, incident resolution protocols, and system configurations, ensuring clarity and accessibility for the support team and streamlining troubleshooting and maintenance activities. Worked with Kafka and JMS for messaging services, ensuring reliable communication between microservices. Implemented AWS Lambda functions for serverless execution of specific tasks, enhancing application responsiveness and optimizing resource utilization.

Implemented a three-layer architecture to design and construct RESTful microservices using Spring Boot, leveraging Java 8 and 11 features such as Stream API, Time API, and Functional Interfaces to optimize performance and enhance code efficiency. `Developed RESTful APIs using Spring Boot web services to establish seamless connectivity between web applications and third-party applications for address validation, ensuring data accuracy and reliability. Proficiently used SQL to construct and modify database tables in Oracle-based databases, ensuring data consistency and integrity. Utilized MongoDB for storing, retrieving, and updating data in JSON format, ensuring efficient data management in a NoSQL environment. Utilized React services for cross-component communication and robust reactive forms validations, improving form processing speed by 15%. Managed repositories with GIT and implemented comprehensive testing strategies using JUnit, Mockito, Cucumber, and Log4J for application logging, resulting in a 35% increase in code quality. Participated in Agile (Scrum) methodology, engaging in daily stand-up meetings, integration testing, and peer code reviews, enhancing team collaboration and project delivery by 20%. Conducted comprehensive testing of resources using the Postman plug-in with the Chrome browser, ensuring the reliability and functionality of APIs and web services.