Honours Mathematics (Co-operative Program) student at the University of Waterloo, interested in software engineering, data science and quantitative development. I build small, careful tools and contribute fixes to open-source projects, with an emphasis on reproducing a bug first and testing the fix.
Portfolio: jelly-raytian.github.io · 中文
Verified against GitHub and upstream main history. Each pull request is counted once, under one status.
| External PRs | Officially merged | Squashed onto upstream main | Consolidated, commits in upstream main | Open / draft |
|---|---|---|---|---|
| 53 | 34 | 3 | 5 | 9 / 1 |
- Officially merged means GitHub marks the PR merged.
- Squashed means a maintainer applied my PR to
mainas a commit authored by me and said so; GitHub shows it as closed. - Consolidated means the maintainer folded the PR into a larger integration PR; my authored commits are in
main's history. These are not counted as merged.
Full record: every PR, status, evidence and maintainer comments → · Case studies →
| Project | Contribution | Outcome |
|---|---|---|
| willfaust/Madeira (C, Swift; Wine/FEX on iOS) | Fixed a startup buffer overwrite for working directories of 260+ characters, with an ASan/UBSan reproduction (#471); stopped Steam Cloud sync from treating unreadable saves as local edits (#472); Vulkan, TaskbarList and UTF-8 launch-path work (#400, #451, #456, #465) | 4 merged, 3 squashed onto main, 5 consolidated, 1 experimental draft |
| PDFCraftTool/pdfcraft (TypeScript) | PDF document-integrity fixes: rotate keeps forms, bookmarks and links (#266); Unicode page-label prefixes (#257); freeze on oversized label ranges (#264) | 10 merged, 4 open |
| DaKheera47/job-ops (TypeScript) | Timezone/DST-correct posting dates (#788); text-PDF import (#789); resume style metadata (#787) | 3 merged, 5 open |
Many of these were developed with AI coding assistance, which the PR descriptions state. Test results quoted in the case studies are the ones each PR reports; I mark where upstream validation is independent.
- WatDesk: an Edge side-panel extension that gathers Waterloo deadlines, exams and grades from LEARN, Crowdmark and Odyssey into one timeline. Data stays in the browser; passwords are never read. TypeScript, v1.9.0 released; Edge Add-ons listing is still under review. Independent student project, not a University of Waterloo product.
- WechatSignals: local-first macOS client for analysing one-to-one WeChat chats (read-only access, anonymisation, SQLite, Keychain). TypeScript.
- CodeCompass and Chronicle: local-first desktop apps in Rust (Tauri for CodeCompass).
- Madeira-Experimental: an unofficial research fork exploring Windows x64 Vulkan on iPad. Incomplete, and not an official Madeira port.
TypeScript · Rust · C · Swift (small changes) · Python (tests and tooling) · Vulkan/MoltenVK basics · PDF internals (pdf-lib, PDF.js) · Git, GitHub Actions
University of Waterloo, Honours Bachelor of Mathematics (Co-operative Program), started September 2026. Currently looking for software engineering co-op and internship opportunities.
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