I build the parts of a product that have to stay correct under load: multi-tenant architecture, payment integrations, booking systems where two people click the same thing at the same millisecond, and event pipelines that keep working when traffic spikes. Ten years of it, most recently as technical lead on a multi-tenant SaaS platform.

Based in Egypt, working remotely.

Multi-tenant SaaS for charity and education organisations. Laravel Octane on FrankenPHP with a Next.js BFF frontend, database-per-tenant isolation, and a hybrid provisioning model that lets certain tenants keep their database on their own servers — custom bootstrapper, scoped credential management, auto-provisioning with rollback. Also built the payment layer: one package, one call signature, several providers behind it.

Stadium ticketing and attendance. Seat booking driven entirely by SVG venue maps, handling 12,000–20,000 spectators per fixture, with admin-side seat distribution wired to ticket types.

Behavioural analytics pipeline. Browser SDK → signed edge relay → write-key verification → RabbitMQ → ClickHouse, feeding a high-volume dashboard. I designed the flow and built the backend and relay.

Backend · PHP, Laravel, Laravel Octane, FrankenPHP, Horizon, Node.js, NestJS, TypeScript Data · PostgreSQL, MySQL, ClickHouse, Redis, RabbitMQ Frontend · Next.js, Vue, Flutter Infra · Docker, Debian, PgBouncer, Prometheus, Sentry AI · RAG pipelines, vector databases, local LLMs (Ollama), spec-driven development workflows

seatmap — a NestJS service answering one question properly: what happens when thousands of people click the same seat at once. Redis holds seats optimistically with a TTL, PostgreSQL decides what was actually sold, and the test suite fires 200 simultaneous requests at a single seat to prove exactly one wins.

• Email — m.abdelbary.a@gmail.com
• LinkedIn — https://www.linkedin.com/in/mohamedabdelbary1985
• Open to remote backend roles