Implemented advanced embedded analytics solutions that integrate seamlessly into diverse platforms, enhancing decision-making processes with real-time data insights.Designed HLD and LLD as per requirement provided by client. Worked closed with PO and architects. Worked Led the development and optimization of data integration and query processing systems using Apache Calcite, facilitating efficient and flexible SQL parsing, optimization, and execution.Developed custom adapters and plugins to extend Apache Calcite's functionality, ensuring compatibility with various data sources and improving query performance by 20%Implemented scalable RESTful APIs, providing seamless integration and communication between various systems and services.Designed APIs following best practices, ensuring efficient data exchange, maintainability, and versioning.Implemented comprehensive security measures, including OAuth 2.0, JWT, and API key management, to protect API endpoints and ensure secure data transmission.Mentored and guided a team of engineers, fostering a culture of innovation, collaboration, and continuous improvement.Conducted code reviews, architectural assessments, and performance tuning to ensure the delivery of high-quality software solutions.Reduced response time of REST API by 40% and implemented reactive programming to existing APIs.Managed distributed transactions and logging, enabling seamless data management and tracking.

Enhanced the payment application of Visa by introducing new features and making improvements to existing ones and also created LLD and SRS docs.Collaborated as a member of the payment API development team to support online transactions across various devices.Successfully converted session-based architecture to RESTful to improve system performance and scalability.Played a key role in the development of microservice architecture and supported the launch of two payment products.Developed BDD for service integration testing to ensure product quality and reliability.Successfully migrated one application to the cloud to improve performance and scalability.Implemented Junit using an in-memory DB (H2DB) to improve testing efficiency and accuracy.Configured Splunk/Kibana for logging to improve system monitoring and issue identification.