Transformer & Meter Inventorization- Engineered Spring Boot and Angular-based applications focusing on transformer and meter inventory management.- Leveraged RESTful architecture with HATEOAS and Swagger for robust API development and documentation.- Utilized Amazon S3 for scalable and secure storage of image assets.- Managed millions of records via a microservice architecture and MSSQL.- Supported the Android team, particularly in Kotlin-based tasks.- Implemented a Jenkins-based CI/CD pipeline running on AWS EC2, orchestrated through Jira.Billing Management Project- Key contributor to a critical billing system, actively used by over 2000 employees and serving more than a million customers.- Ensured full compliance with government norms and regulations.- Achieved a complex Spring version upgrade, involving refactoring of over 200 files and migration to Spring Security.- Integrated Spring Batch with multithreading to improve meter reading speeds by 2-3x.- Introduced Ably for real-time synchronization across client UIs.Auction Management Project- Contributed substantially to daily auction management, overseeing more than 20 auctions each day.- Deployed AWS Lambda for efficient log parsing, which then sent processed data to OpenSearch for improved log analytics.- Led the transition from HTTP to HTTPS, ensuring secure data transmission.- Improved database efficiency and resolved bottlenecks by implementing Hikari pooling.My.Energo-Pro.ge Customer Portal- Managed a customer portal with a user base exceeding 50,000, focusing on account management features.- Rectified email delivery bottlenecks by integrating Sendgrid.- Replaced traditional paper forms with digitized versions, streamlining the customer service department.- Actively collaborated with the frontend team for Angular-based tasks.- Significantly improved code quality by increasing test coverage from 30% to 80% through JUnit 5 and integration tests.