Case studies
Projects
11 write-ups. Each one covers the problem, what I built, and what the decision cost.
Betting Wallet Redesign
A wallet service where two bets placed at the same instant could both spend the same balance.
Computer-Use Agent
Agents that read the screen as pixels and drive legacy desktop software that offers no API to call.
AI Restaurant Ordering
A waiter that answers menu and allergen questions from retrieval rather than model memory, on a locally hosted LLM.
AI Marketing Agents
Three agents — research, creative, compliance — where nothing reaches a channel until the compliance pass clears it.
AI-Augmented Development
A hybrid LLM workflow that plans on an expensive model and generates on a cheap one.
OAuth2 Authentication Service
One OAuth2.0 / OpenID Connect service replacing per-product logins across multi-tenant fintech apps.
Healthcare EDI & HL7 Integrations
Dynamic 835/837 EDI and HL7 parsers that turn messy, multi-vendor healthcare interchange into reliable structured data.
Smart Meter Calibration System
A multithreaded calibration pipeline that took smart-meter manufacturing from one meter per cycle to forty.
Payment Transaction Optimization
A stored-procedure refactor that turned per-row transaction processing into a set-based single pass for daily financial workloads.
Enterprise Payment Microservices
Payment services split along the boundaries that matter — gateway, payments, ledger, notifications — carrying millions of records a day.
Payment Gateway Integrations
Reliable integrations into Egyptian payment channels — Fawry, Aman, and Sahel — with routing and failover at user scale.