Developed new feature sets in a microservice environment for a health management platform, improving applicationperformance by 20%.• Implemented and consumed RESTful APIs using Node.js and TypeScript for seamless integration with the frontend.• Engineered session management and Single Sign-On (SSO) features to maintain session continuity across multipleapplications.• Utilized AWS cloud services, including S3, EMR, Redshift, Athena, and Glue Meta store, for scalable data processing andstorage solutions.• Implemented J2EE design patterns such as Singleton, Session Facade, and Data Access Object (DAO) for efficient backenddevelopment.• Employed Spring MVC architecture and Hibernate framework to enable application-level persistence and data sharing acrossMVC layers.• Developed dynamic web interfaces using JSP, JSTL, AJAX, HTML5, CSS3, and JavaScript for an enhanced userexperience.• Created and executed test cases using Karma and Grunt for AngularJS-based applications to ensure code quality andreliability.• Implemented business rules using Drools, facilitating easy updates and maintenance of complex logic by business analysts.• Led CI/CD deployment activities across production, development, and testing environments, ensuring smooth and efficientreleases.