Led the development of scalable backend services using C#, .NET Core, Java, and Spring Boot to support high-traffic applications,optimizing performance to handle millions of daily transactions. Modernized legacy codebases by migrating core functionalities to .NET Core and AWS Lambda for improved scalability, security, andmaintainability, reducing technical debt and streamlining codebase structure. Developed and deployed RESTful APIs on AWS API Gateway to facilitate seamless communication between front-end and backendservices, supporting payment processing, user authentication, and data synchronization. Designed dynamic and responsive user interfaces using JSP, AJAX, HTML5, and JavaScript to enhance user experience and supportreal-time interactions across desktop and mobile platforms. Utilized AWS cloud services (EC2, S3, RDS, DynamoDB) to create robust, scalable solutions, optimizing resource allocation, andenhancing data storage and retrieval processes. Integrated error logging and monitoring with AWS CloudWatch, Prometheus, and Grafana to enhance visibility into system health,detect issues in real-time, and ensure high availability. Collaborated in an Agile environment, contributing to sprint planning, daily stand-ups, and retrospectives, while aligning closely withcross-functional teams to deliver high-quality software solutions. Conducted comprehensive unittesting with JUnit and xUnit(for .NET applications)to ensure reliability and stability of critical services,such as ride allocation, fare calculations, and user notifications. Implemented data caching strategies using AWS ElastiCache and in-memory caching with Redis, reducing latency and enhancing realtime performance for analytics and driver tracking.

 Developed and maintained backend services using Spring Boot and Java, following a microservices architecture for scalability andperformance. Designed and implemented RESTful APIs for service communication, ensuring secure authentication with OAuth 2.0 and JWT. Integrated backend services with AWS, utilizing AWS RDS for database management and S3 for secure file storage. Used Node.js for specific microservices requiring asynchronous processing, supporting high-load operations. Collaborated with frontend teams to build interactive user interfaces using React.js, integrating frontend and backend components. Used GitHub for version control and Jenkins for CI/CD, streamlining development and improving deployment efficiency. Optimized database queries using JPA and Hibernate, enhancing system performance by reducing query execution times. Automated testing of backend services with JUnit and Mockito, supporting code quality and reducing defects in production.

Developed backend modules with Java 8 and Spring Boot, focusing on microservices for scalable application architecture. Built and optimized RESTful APIs, integrating them with enterprise applications for smooth data exchange. Led development of responsive user interfaces using Angular, enabling dynamic interactions between frontend and backend services. Implemented JWT authentication and role-based access for secure API endpoints, ensuring robust application security. Worked extensively with relational databases like MySQL and PostgreSQL, writing optimized SQL queries and using Hibernate forORM. Employed Spring Cloud for service discovery and fault tolerance, utilizing Eureka and Hystrix to maintain high availability. Automated build and deployment processes using Maven and Jenkins, reducing errors during deployment. Wrote unit tests with JUnit and integration tests with Spring Test, maintaining high code quality and coverage