• Actively developed new features and maintained critical Java/Spring Boot backend microservices supporting transaction processing, account management, and payment initiation.

• Built scalable and secure RESTful APIs using Spring Boot stack (Spring MVC, Data JPA, Security), implementing business rules and access controls that protected sensitive customer and payment data.

• Designed and wrote efficient SQL queries and stored procedures on MySQL for reconciliation, reporting, and daily settlement processes.

• Enhanced and maintained a suite of Python automation scripts responsible for batch processing, data extraction, file transfers, and scheduled regulatory tasks supporting compliance and operations teams.

• Implemented and tested Kafka producers and consumers in Java/Spring Cloud Stream for publishing and subscribing to transaction-related events (e.g., payment status updates) under senior guidance.

• Assisted the team with ElasticSearch helped configure indexes and mappings, and wrote simple search queries for transaction and audit log retrieval.

• Deployed microservices on AWS (EC2), used S3 to store batch reports and logs, and monitored application with CloudWatch.

• Participated actively in Agile ceremonies (daily stand-ups, sprint planning, retrospectives) and collaborated with cross-functional teams to meet delivery timelines.

• Assisted in migrating parts of the application to a serverless setup using AWS Lambda and API Gateway under senior guidance, wrote and tested several Lambda functions that improved scalability and reduced cold-start issues.

• Helped launch and configure EC2 instances, set up Auto Scaling Groups, and attached an Elastic Load Balancer, performed basic smoke tests after deployments.

• Conducted load testing with Apache JMeter on staging environments and shared results that helped the team improve capacity for concurrent users.

• Improved page-load performance by refactoring JSP pages and optimizing a few Spring Boot controller methods based on senior code reviews.

• Updated Hibernate mappings and entity classes during a version upgrade, which reduced repetitive database queries in development testing.

• Extended an existing Jenkins Pipeline added stages for Maven builds, running unit tests, and uploading artifacts to S3, reducing manual deployment steps.

• Wrote and maintained unit/integration tests using JUnit and Mockito, keeping branch coverage above 80% for assigned tasks.

• Participated in daily stand-ups, sprint planning, and retrospectives in a Scrum team.