• Spearheaded the maintenance and enhancement of a legacy full Stack project which is a portal for childcare services under the Maryland State Department of Education.• Involved in designing and developing the migration from a custom framework to Spring framework (Spring, Angular), hence greatly increasing the reliability and maintainability of the system.• Utilized projects such as Spring Boot, JPA and Security to implement different modules of the system, improving scalability and deployment times by 60%.• Developed SQL queries for various reports and operations utilizing Spring JPA for efficient and scalable interaction, hence greatly increasing processing times for report batch operations.• Designed and developed Spring REST APIs for third-party operations, data synchronization, and messaging-based communication using Kafka, thus increasing reliability and accuracy of operations and reports by over 40%. • Wrote comprehensive unit and integration tests using JUnit and Mockito, achieving 90% test coverage.• Documented APIs and their use case with examples, using Swagger for effective collaboration within team.• Mentored junior developers, conducted code reviews, and implemented best practices, resulting in a 20% improvement in team productivity.• Collaborating with product managers, quality assurance, and other developers, to ensure ideal integration of new features and improvements.

• Worked on the migration of the Interconnect system, a SaaS platform with customizable user features, from on-premises infrastructure to AWS, leveraging cloud-native services for improved scalability, security, and performance.• Developed and deployed Spring Boot microservices, integrating them with internal and external applications hosted on AWS. Leveraged AWS API Gateway, AWS Lambda, and Amazon ECS for seamless deployment.• Built microservices for transactional data metrics, using Elasticsearch for optimized storage and retrieval, and integrated with AWS Kinesis for real-time data streaming, reducing query latency by 35% and enabling near real-time analytics.• Collaborated with SCRUM teams on iterative development using Jira and Bitbucket for tracking and Jenkins for CI/CD releases.• Configured ELK Stack for centralized logging and monitoring, reducing production downtime by 40%. Utilized AWS CloudWatch for performance metrics and alerting.• Played a critical role in migrating on-premises services to the AWS cloud environment.• Utilized MySQL, S3, and Elasticsearch aggregations for database and metric solutions related to reporting • Developed transaction processing microservice using Spring Batch, Spring Boot and JPA, efficiently handling 10 large-scale batch jobs each containing an average of 1~2 million transactions each.• Developed unit tests using JUnit and Mockito, achieving 95% test coverage and ensuring reliable code quality across multiple microservices.• Worked with DevOps on deployment pipelines using Jenkins, integrated with Docker for containerization and Kubernetes for orchestration on AWS, ensuring consistent and rapid deployment cycles.

Project Cardtronics, Inc., USADeveloped web applications and interface for adding ATMs configurations, and show their statistical and graphical presentation of transactions, status, and properties. Used Java 7 and on-prem environment to develop and deploy. • Worked as a Network Data Centre Operations specialist to monitor and troubleshoot Postillion transaction switching software.• Hands-on experience with object-oriented approach to problem solving, design, and development.• Involved in gathering and analyzing system requirements. • Designing and establishing the process and mapping the functional requirement to the workflow process. • Wrote test cases using Junit.• Developed and implemented spring and J2EE based MVC (Model-View-Controller) framework for the application.• Developed the apps using design patterns like Singleton, Business Delegate, MVC and Factory Pattern for re-usability. Developed reusable utility classes in core java for validation that are used across all modules. • Designed and developed reusable Java utility classes for business logic functionality using services, JDBC & JNDI.• Worked on JAVA technologies such as Multi-Threading, Exception Handling, Collections, Streams & File I/O. • Developed web pages using JSPs and JSTL to help internal end user view statistical reports. Also used XML Beans for data mapping of XML into Java Objects. • Designed database Tables, views, Indexes and created triggers for optimized data access. • Involved in Unit integration, bug fixing, acceptance testing with test cases, Code reviews. • Designed and developed an MVC pattern application to configure ATMs.• Provided troubleshooting and error handling support in multiple projects.• Involved in developing components on Transactional Dashboard with JSF, Spring Framework, Spring MVC and Hibernate and created Micro Services using Spring Boot.