Redesigned video caching algorithm using C++ to resolving playback judder for non-linearly stored video content, replaced manual memory allocation with smart pointers, reducing leaks and improving reliability.

Collaborated with team members to conduct performance testing and fine-tune caching strategies, observing a 40% reduction in video playback latency

• Implemented a fault tolerant and self-healing Saga transaction microservices that uses HTTP/RESTful APIs to communciate between services.

• Designed and developed a language-agnostic testing framework for the Saga transaction coordinator that utilizes API calls and service hooks to verifying program correctness. The framework is integrated in a lab assginment that challenges student to develop a complete microservice and learn the relevant topics.

• Deployed a online homework auto-grading platform to the cloud with Docker compose, significantly lifted TA workload and provided students with quick feedbacks.

Led efforts in enhancing accuracy of the Person Re-Identification (Re-ID) model (project in Python with PyTorch) by researching and combining various established algorithms and tricks.

Through innovative approaches, model accuracy is improved from 95% to 98%, without extra inference cost.

Collected of datasets essential for training the Re-ID model by taking initiative to set up cameras and gathering data from company employees, ensured availability of high-quality data for project."

"Engineered Symfony(PHP)-based web forum backend with OAuth2 login, permission groups, and tags.

Replaced outdated forum, enhanced permission control, code maintainability, and achieved 50%+ performance boost.

Developed async web crawler, allowing users to access coding contest information across websites; used Redis for data caching, and allowed multi-user access. Daily active users increased around 5%."