Hiii, I am Yirong. I like turning everyday problems into software I can actually use. I have a Computer Science background and experience at AWS, but this page is mostly about what I am curious about now: learning new technologies, building personal tools, and seeing which ideas are useful enough to stick around.

A local expense tracker I am building with C# and .NET to make understanding my spending easier. It lets me add and manage expenses, compare different months, and view breakdowns by category and payment method.

A simple Apple Watch app for recording jumps during a workout. The main screen shows the daily total and provides quick preset buttons so recording jumps takes only a tap.

Languages
Python · TypeScript · Java · JavaScript · C# · C/C++

Tools and Technologies
React · AWS · SQL · Git · Figma · Jira · .NET · Node.js · Flask

Current Focus
Learning new technologies and building practical tools for everyday use