Designed RESTful microservices using Java 11, Spring Boot, Spring Data JPA, and Spring Security for modular banking functionalities across accounts, transactions, and user management. Developed dynamic UI components with Angular 12, TypeScript, and Angular Material, achieving a 25% faster page load and improved customer experience. Integrated PostgreSQL for transactional consistency and Apache Cassandra for high-throughput NoSQL storage, enabling sub-second query response times. Refactored backend, added cache layer, and optimized queries to improve API performance by 40%, reducing latency from 850ms to under 500ms. Used AWS Lambda for event-driven processing including transaction notifications, reducing processing time by 35% and improving scalability. Worked in Agile/Scrum with JIRA for planning, stand-ups, and stakeholder demos.

Full Stack Developer at Cognizant

October 1, 2020 - December 1, 2022

Developed frontend dashboards using React, JavaScript (ES6+), HTML5, and CSS3, increasing user engagement by over 22%. Architected a multi-tenant system with Spring Security and OAuth 2.0/OpenID Connect for secure data segregation across 300+ clinics. Managed MySQL with indexing and partitioning; integrated Elasticsearch for fast search and analytics. Built event-driven pipelines with Apache Kafka and RabbitMQ; used Redis caching for fast data access. Increased unit/integration test coverage from 50% to 70% using Mockito and Cypress for E2E testing. Implemented RESTful APIs using Java 8 and JPA/Hibernate for multi-tenant healthcare analytics; improved backend reliability and reduced production issues by 30%. Built end-to-end CI/CD pipelines with GitHub Actions and Argo CD.