Leo Zhang - Projects

TypeScript · Next.js · React · Tailwind · Framer Motion · Supabase · PostgreSQL

• Webring connecting the personal sites of Waterloo SYDE 2030, live at syde30.com.
• Members embed an iframe polaroid on their own site — same photo, live video on hover, name reveal — that auto-syncs when they update their profile on the ring.
• Supabase-backed profiles with pre-filled embed snippets and zoomable navigation across the ring.

Go · Docker · GitHub Actions · Prometheus · Fly.io

• Reverse proxy that computes real-time traffic analytics in constant memory — about 610 KB of sketches allocated at startup, no matter the traffic volume.
• HyperLogLog, Count-Min Sketch with top-K tracking, and bucketed latency histograms (p50/p95/p99) built from scratch in pure Go stdlib, running on a single lock-free goroutine.
• Separate data and control planes: proxying with per-request events on one port; live dashboard, JSON stats API, and Prometheus metrics on another.
• Sketch-backed rate limiting — Count-Min never undercounts, so abusers can't slip under the limit; zero-allocation hot paths at roughly 8 ns per add.

Python · FastAPI · PyGhidra · Gemini · Hugging Face · Next.js · React · Tailwind · Monaco · Docker · Caddy

• Turns stripped PE/ELF binaries into readable C: PyGhidra auto-analysis filters out library code and lifts user functions to pseudo-C — binaries are never executed.
• Two-pass AI refactor: Gemini Pro repairs control flow, data structures, and logic; Gemini Flash renames symbols and documents the result.
• Monaco split view diffs the raw decompilation against the refactored source with one-click .c export; uploads via drag-and-drop or a companion Chrome extension.
• Sandboxed FastAPI pipeline behind Caddy via Docker Compose; files are deleted after processing.

Python · OpenCV · MediaPipe · NumPy · PyAutoGUI

• Hands-free mouse: MediaPipe hand landmarks track the palm center, and an inner capture zone maps 1:1 to screen coordinates so the cursor reaches every edge.
• EMA smoothing with velocity-based prediction and a small deadzone filter hand tremor into stable cursor motion.
• Index and middle-finger pinches fire left/right clicks; an open palm enables control and a fist locks it — dispatched as OS events through PyAutoGUI.

TypeScript · React · Vite · Tailwind · Node.js · Express · MongoDB · JWT · Multer · FFmpeg · AWS S3

• Full-stack video platform pairing YouTube-style functionality with a Netflix-style interface.
• Upload pipeline: Multer ingestion processed with FFmpeg and streamed from AWS S3.
• JWT auth with email-based password reset; likes, comments, subscriptions, and playlists on MongoDB models.