Yichen Tsai

Shipped new C# features on .NET Framework and .NET for the 7-ELEVEN POS system running in 7,000+ stores, including promotional pricing logic and a prize draw system. Resolved daily store service requests within a 2-hour target through on-call production support and troubleshooting.

Engineered drawing canvas navigation and sketch history management for a Swift-based iOS creative app. Integrated real-time AI image-to-image generation and designed request triggers for responsive creative workflows.

Cut daily support tickets by ~15% by fixing a JavaScript checkout race condition that caused double charges. Ran test uploads and verified a ~0.4 s cut in average page-load time while supporting the migration of the image-compression and asset-delivery pipeline to AWS Lambda, S3, and CloudFront.

Developed 10+ C# UI components and screens in Unity for mobile and PC games from artist designs and planner specs. Implemented foundational login and logout authentication modules in C# for a game serving iOS, Android, and PC players.

Pursuing a Master of Computer Science with an expected graduation in August 2027.

Completed an Ontario College Diploma in Software Engineering Technician in August 2026.

Earned a Bachelor of Arts in German Language and Culture in June 2023.