September 2019 - July 2021 Re-architected the backend of a web-based CCTV monitoring app, increasing video processing speed by 6×. Led the implementation of unit and E2E tests, achieving 90%+ test coverage for improved reliability. Refactored the frontend with scalable design patterns, enhancing maintainability and extensibility. Optimized the mobile experience and introduced CI/CD pipelines for seamless testing, builds, and deployments. Enhanced live streaming capabilities with support for HLS, MJPEG, and DASH, ensuring smooth and reliable playback.