• Configured a robust database connection pooling mechanism using Java in AWS Lambda for MongoDB, mitigating connection leaks and improving database reliability, resulting in 80% reduction in database processing for car Insurance Banking Firm.• Engineered a dynamic Java interceptor for RESTHeart gateway, enhancing the processing efficiency of REST APIs, leading to a 25% improvement in response times and streamlining AWS SNS/SQS communications.• Spearheaded the migration of static database collections to a dynamic configuration model within RESTHeart, enabling flexible data handling and reducing maintenance overhead using Spring Boot.• Integrated Amazon Lex API and optimized AWS MQTT communication, significantly enhancing real-time interaction capabilities and reducing message latency by 40%.• Implemented Dagger in AWS Lambda for Auto-wiring the MongoDB database operations mechanism reducing the latency of the database.• Integrated a seamless Stripe payment gateway in the backend using Java, optimizing payment processing logic and implementing a custom card handler, resulting in a 30% faster and smoother transaction experience.• Optimized concurrent database operations using multithreading in Java to handle multiple simultaneous requests in AWS Lambda, improving the overall efficiency and scalability of the system, reducing response times during peak loads.• Developed a cron job in JavaScript with MongoDB aggregation queries to sync changes from one collection to multiple others, enhancing update efficiency by 50%.• Developed a Stripe subscription service in Java to handle monthly and yearly charges based on a user's quote, including a subscription fee, until the full insurance amount is collected.

• Engineered a robust micro services architecture using Java, Spring Boot, Liferay and REST APIs for a major car leasing company and investment firm reducing system response time by 30% and improving scalability. • Developed dynamic web applications with Spring MVC, JSP, AJAX & JQuery, resulting in a 25% increase in user engagement and a seamless user interface for a financial services platform with over 300,000+ monthly users. • Implemented advanced data persistence layers using JDBC, Hibernate and JPA optimizing PostgreSQL database interactions and improving data retrieval speeds by 40%. Enhanced application performance and reliability by refactoring legacy code-bases. • Coordinated with cross-functional teams to gather requirements and deliver tailored software solutions, accelerating project timelines by 15% and boosting client satisfaction. • Saved an entire project from potential failure by implementing a robust RESTful API, ensuring seamless data integration and client satisfaction.

Developed and deployed multiple micro services in Java using Spring Boot and for a Hotel Rating Service facilitating seamless communication between services through APIs.• Utilized a diverse range of databases, including SQL databases like MySQL and PostgreSQL, as well as NoSQL databases like MongoDB, to store and manage data for various services.• Employed Spring Cloud's Eureka for service discovery and registration, enhancing the scalability of the system.• Integrated Postman for comprehensive testingof APIs, ensuring reliability and functionality of the developed services.

Developed internal Admin/Finance dashboard web application for an e-commerce company.• Created entire websiteusing React, Redux alongwith back-end technologiessuch as Node.js, Express.• Optimized data storage and retrieval by integrating with NoSQL (MongoDB)database.

Lead, Designed and Developed a user preference based wallpaper download application in Java from scratch which fetches 4k HD Images. Utilized Pixels API to fetch a vast collection of high-quality images for users to explore and download. • Designed and implemented intuitive user interface with smooth navigation and seamless image loading. • Implemented efficient pagination mechanism to enhance the user experience and optimize loading times. • Integrated advanced search functionality, allowing users to easily find specific images based on keywords or categories.