Wei Tan

A privacy-first macOS menu bar app that visualises keystrokes and mouse activity across a 30-day window to reveal work rhythm and app-level attention patterns — fully on-device, zero telemetry.

A custom publishing platform with per-channel content visibility, scoped full-text search, and AI-assisted content management via an MCP API — built on Next.js, Cloudflare Workers, D1/R2, and an OAuth 2.0 + PKCE auth server.

A Master's thesis project implementing decentralised document attestation on Ethereum — multiple parties co-sign a file's SHA-256 hash on-chain, proving co-possession without uploading the file or trusting a central notary.