Muhammad Talha

An infinite-canvas whiteboard app with freehand drawing, shapes, panning, and zoom — built to understand real-time collaborative editors from the inside out.

• World-to-screen coordinate transforms keep drawings precise at any zoom or pan position
• Designed a Redis-backed real-time layer to sync canvas state across multiple users

A browser-based utility for merging, splitting, and reorganizing PDFs — no accounts, no watermarks, nothing stored longer than it takes to process the request.

• Structured as a Turborepo monorepo with shared packages
• Unit tested with Vitest

A standalone, network-callable rate limiting service designed to provide centralized request throttling across multiple applications. Implements both Token Bucket and Sliding Window algorithms.

• Eliminated race conditions using atomic Redis Lua scripts (EVAL) to ensure accurate cross-network limits
• Decoupled concurrency strategies directly into storage adapters (Memory vs. Redis) rather than using a generic interface
• Load tested to handle ~1,600 concurrent requests per second with sub-50ms average latency

A two-player chess implementation written in pure Python with a Flet UI — full move legality, check/checkmate detection, and turn state, no game engine or framework doing the work underneath.

• Built first semester as a from-scratch exercise in modeling game rules and state
• All board logic, move validation, and game-over conditions written by hand