Selected work.

Cross-college .edu social app, now a native SwiftUI iOS client on TestFlight beside the Next.js web app — one Supabase backend, 64 migrations, RLS on every table. APNs pushes drain an append-only notification queue claimed atomically with FOR UPDATE SKIP LOCKED.

Evolved from cashback into a fashion decision engine — a deterministic per-product “should I buy this?” verdict, a brand-intelligence layer, and a price-history layer fed by a daily cron behind a pluggable provider interface. A native SwiftUI companion app on TestFlight reads the same Supabase backend.

Config-driven computer-vision pipeline that turns badminton match video into player pose, footwork, and shuttle tracking — 10 swappable stages, 175 tests, a custom PyTorch CNN tracking the shuttlecock frame by frame, and recovered motion exported to BVH for standard 3D tools. Elite-level racket-head speeds (38–49 m/s) fall out of the joint kinematics, and players are re-identified across clips with a mean-centered ResNet embedding plus average-linkage clustering.

Invite-gated iOS app for sharing meal photos with friends, built on an append-only data model — every edit appends a version, nothing is ever truly deleted. The camera-to-cloud pipeline normalizes orientation, resizes to 1600 px, and strips EXIF/GPS before upload, with optimistic posts that survive backgrounding.

Local-only iOS medication tracker — SwiftData on device, no accounts, no backend, no analytics. Adherence is scored honestly (capped per day so double-dosing can't mask a miss), and interactive widgets, a Live Activity countdown, and notification actions log doses without opening the app.

iOS app that recognizes ambient music with ShazamKit and auto-adds the ISRC-matched track to Spotify. The OAuth client is the interesting part — PKCE with no client secret, an S256 challenge over a random verifier, single-flight token refresh so concurrent calls share one refresh task, and a method-aware retry policy: 401 refresh-and-retry, 429 Retry-After, 5xx on GET only.

Local-first music discovery that clusters a Spotify library into taste-modes with TF-IDF and HDBSCAN, then fuses Last.fm and ListenBrainz collaborative-filter signals through a consensus scorer weighting cross-source agreement, popularity, and recency decay. A thumbs-feedback loop trains a class-balanced logistic regression online, and its coefficients become a per-candidate score multiplier.

Chrome extension that autofills job applications across Workday, Ashby, and react-select forms — defeating React's controlled-input tracking via the native value setter and frame-accurate input/change event sequences, with a shadow-DOM-piercing field scanner and an all-frames iframe pass (214 tests). A two-tier engine resolves common fields locally with zero network calls, backed by a per-domain cache that replays confirmed fills and invalidates on a profile-hash change.

Team statistics project: a multivariate clustering pipeline over 7,749 Chicago Airbnb listings — PCA, k-means, and full-covariance GMM recovering four latent operating types, with separation validated by a from-scratch MANOVA (Wilks' Λ = 0.024) cross-checked against statsmodels to within 1%. Validation is built from scratch too — Box's M, a 1,000-permutation MANOVA, bootstrap Jaccard stability of 0.93–0.98 — behind an 89-assertion reproducibility audit that fails the build if any cited statistic drifts.

Chrome extension that captures the active tab as video and streams chunks to the cloud for AI-enhanced playback while you're still recording — sharper, cleaner footage delivered as an HLS stream.

Fine-tuned EfficientNet-B5 for ovarian cancer subtype classification. Kaggle competition entry with a custom PyTorch DataLoader for slides up to 100,000 × 50,000 px.