Developed and maintained full-stack Java-based applications by leading end-to-end design and development across the SDLC, leveraging Java/J2EE technologies, Spring Boot, and microservices for robust and scalable solutions. Implemented intuitive front-end designs using HTML5, CSS3, and React JS, enriching user interactions with frameworks like Angular and Redux. Utilized agile methodologies and Scrum practices to foster collaboration, delivering functional increments and stakeholder feedback in 2-4 week sprints. Employed JIRA, Git, and Maven for task tracking and version control, and created CI/CD pipelines using Docker, Kubernetes, and Jenkins for efficient deployments. Integrated PostgreSQL in Unix environments for optimized data handling and AWS services like Lambda and Redshift for cloud-native architecture. Designed RESTful and gRPC APIs, employed Kafka for event-driven microservices, and ensured security with Spring Security features like OAuth and JWT. Adopted best practices for code reliability using JUnit, Mockito, and Cypress, conducting BDD with Gherkin and Cucumber. Focused on performance monitoring with AWS tools and containerized applications in Unix using Docker and Kubernetes.

Actively participated in Agile ceremonies, collaborating closely with cross-functional teams to ensure alignment and smooth project delivery. Designed and implemented Spring Boot microservices, integrating Oracle databases via Hibernate for efficient data management, and created React-based single-page applications for a seamless user experience. Leveraged AWS (S3, Lambda, Elastic Beanstalk, EC2, and API Gateway) for cloud-native development and deployment, enhancing scalability and security. Managed identity and access with Okta, implemented ECM and BPM solutions, and optimized database performance on AWS RDS. Streamlined development with CI/CD pipelines in PCF, automated testing with Cypress, and leveraged Kafka for real-time messaging, improving data handling and operational efficiency. Documented APIs with OpenAPI, utilized DynamoDB for high-performance NoSQL storage, and conducted performance testing using JMeter and Spring Batch to ensure system reliability.

Utilized Agile methodologies to analyze requirements and collaborate closely with DevOps, architects, and SREs for successful application delivery. Designed and implemented J2EE web tier components, developed custom Ant tasks, and created Spring Boot microservices to enhance system architecture and unify ecosystems. Integrated and containerized applications via Kubernetes, set up an MVC framework using Node.js, and connected Angular 6 front-end with MongoDB for real-time services. Leveraged Spring Batch for error handling, used Ansible for configuration management, deployed applications on Azure and OpenShift, and optimized data handling with Java Streams, MongoDB, and Apache Cassandra. Developed RESTful APIs and GraphQL queries, conducted automated testing with Mockito, Cucumber, and Selenium, and ensured web accessibility and SEO best practices in front-end development using HTML, CSS, and JavaScript frameworks. Employed Splunk for log analysis, Jenkins for CI/CD, and TestNG for comprehensive E2E testing to maintain high standards of application reliability and performance.

During my tenure at KPMG India, I contributed to the development of robust web applications using Java/J2EE technologies. Employing an iterative methodology, I revamped existing code and wrote new modules to meet user requirements effectively. My responsibilities included translating functional requirements into technical designs by gathering user stories and implementing backend solutions using Java integrated with SQL databases. I specialized in developing SQL queries for data retrieval and employed JDBC for the Data Access Layer. Implementing MVC architecture with JSP/Servlet frameworks, I separated business logic from presentation logic. I also utilized DAO pattern for efficient data access and implemented RESTful web services using JAXB to simplify client interactions via standard HTTP URIs. I enhanced user interfaces with jQuery for functionalities like form auto-completion and validation. Leveraging multithreading concepts, I optimized data processing by transforming files between formats for efficient database integration. I ensured robustness through comprehensive unit tests using TestNG, covering all project scenarios. Collaborating closely with team leads, I designed and implemented backend Java classes to support data access and user authorization, aligning closely with business requirements.

At Deloitte India, I played a pivotal role in designing and implementing sophisticated software solutions within the J2EE environment. I focused on architecting applications following the J2EE MVC framework, ensuring robustness and scalability. My responsibilities included developing interfaces using HTML and JSP pages, integrating them with Struts for effective Presentation View. I leveraged Servlets running under JBoss for seamless backend operations and designed user interfaces using JSPs, custom tags, and JSTL TagLibs to enhance user experience. I developed Java business classes to handle diverse functions and implemented controller classes using Struts and tiles API for efficient flow control. Utilizing J2EE design patterns and DAO, I strengthened the business and integration layers of projects. I also designed and developed Message Driven Beans for asynchronous message processing and implemented CMP entity beans for persistent business logic. My expertise extended to database interaction using JDBC API, encompassing SQL query statements and prepared statements for optimized data retrieval and manipulation. I ensured high-quality deliverables through meticulous inspection and review of design documents. Additionally, I contributed to the development of EJBs (Session and Entity Beans) for business processing and database access, enhancing application performance and maintainability. Utilizing tools like Tortoise SVN, I maintained version control and facilitated seamless code merges and branching strategies. Maven served as our preferred build tool for streamlined deployment processes.