Oct 2024 – Present · 1 yr 5 mos

• Redesigned the bulk upload service to efficiently handle 50,000 records per Excel file (10MB), optimizing performance with ExecutorService for parallel processing and Kafka for event-driven architecture.
• Reduced production memory usage from 7GB to 3GB by identifying and fixing memory leaks through heap dump analysis, and implemented streaming workbooks (SXSSFWorkbook) for efficient large-file processing.
• Developed a high-performance multilingual messaging API, capable of handling 80-100 RPS, leveraging Redis caching and in-memory Guava cache to minimize database load and improve response times.
• Implemented Java 8 features like Stream APIs and Lambda Expressions for efficient data processing, while following Strategy, Builder, and Singleton design patterns to ensure maintainable and scalable code.
• Led and managed cross-functional teams (3 members team for bulk upload, 2 members team for multilingual messaging), overseeing development, task delegation, PR reviews, and ensuring timely project completion.

Jul 2022 – Oct 2024 · 2 yrs 3 mos

• Developed a centralized JAR to standardize and modularize common functionalities, enabling seamless integration across multiple projects and improving maintainability.
• Implemented a custom logout timeout feature, allowing companies to configure session expiration dynamically, adopted by 100 companies and impacting over 2 million employees.
• Optimized debugging and creation time by 80% by improving logging mechanisms, reducing redundant code, and streamlining issue-tracking processes.
• Integrated Redis for session management, storing login information globally and setting TTL over keys to manage session expiration efficiently, enhancing scalability.

Jan 2022 – Jul 2022 · 6 mos

• Developed an internationalization API to support multiple countries by managing SysCountry and Date-TimeFormat, ensuring seamless localization.
• Fixed 450+ bugs in a multi-country, multi-entity project, improving system stability, performance, and user experience.