Experience — backend & SaaS engineering roles and systems owned
Experience
Where I've shipped
Roles, scope, and the systems I owned. Engineer voice — no marketing copy.
Current
Jan 2026 – PresentBackend / Full-Stack Developer
RSTM Marketplace
- Develop and maintain backend services for a multi-vertical, multi-tenant marketplace on a TypeScript monorepo, where shared infrastructure — authentication, payments, notifications — powers many storefronts from a single codebase.
- Work on a PostgreSQL data layer with Drizzle ORM using sequential migrations, multi-tenant isolation, and an 8-role access-control hierarchy.
- Integrated Stripe Connect payments — vendor onboarding, charges, transfers, refunds, and escrow — with signature-verified webhook handling.
- Contributed to a multi-channel notification platform (email, SMS, push, in-app) with real-time Server-Sent Events over a Redis pub/sub bridge, backed by idempotent background workers and an outbox pattern.
Backend Developer
Corporate Synergy Solutions
- Developed and maintained a multi-tenant SaaS backend for an auto-detailing chain, handling bookings across multiple locations with real-time scheduling that helped prevent double-bookings.
- Implemented customer and service management modules with REST APIs, normalized relational models, and token-based authentication.
- Integrated Stripe payments with HMAC-validated webhooks, and contributed to an AI-agent automation platform enabling conversational agents across chat, web, and voice, grounded in retrieval over a customer knowledge base.
Backend / AI Engineer (Contract)
Just Hired AI
- Built Phantoms, a multi-tenant NestJS backend automating short-form video end-to-end — AI script generation, rendering, approval workflows, and multi-platform publishing — on a BullMQ + Redis pipeline with circuit breakers and dead-letter handling.
- Built Inroads, a credit-economy referral marketplace backend with an escrowed credit ledger, idempotent transactional claims, queue-based automation, and webhook-driven contact enrichment.
Backend Engineer (Contract)
NDA Clients
- Built a PHP 8.2 / Laravel 12 legal-tech integration middleware syncing law-firm systems (Litify/Salesforce, Filevine) with Zendesk — OAuth 2.0 token management, HMAC webhook verification, idempotent processing, and bidirectional sync — covered by 290+ passing PHPUnit tests.
- Built a Node.js live golf-scoreboard data bridge feeding broadcast graphics, with parallel polling, last-good caching, and rate-limit backoff.
Full-Stack / PHP Developer
TSR Ventures & Solutions
- Engineered a reusable-module PHP framework that reduced code duplication and improved development velocity across client projects.
- Implemented a Shopify integration layer with supporting dashboards connecting external commerce data to internal backend modules.
- Developed a Digital Asset Management system handling large media libraries with automated metadata extraction and indexing.
Full-Stack Developer
Panel Misr
- Developed the company website, admin dashboard, and a Laravel e-commerce platform with inventory management and order tracking.
- Implemented database-driven modules and admin features across frontend and backend.
Proven Results
Results & Impact
Measurable outcomes clients see when working with me.
40%
Faster Development
A custom PHP framework and reusable backend modules lifted team velocity
100%
Zero Double-Bookings
Real-time scheduling eliminated all booking conflicts for a multi-location chain
10K+
Files Processed
Automated media pipeline processing thousands of digital assets with metadata extraction
80%
Faster Estimation
AI photo analysis for instant job quoting dramatically reduced manual estimation time