09/29/2026 updated
100 % available
Senior Web Full-Stack Developer & Tech Lead
Damanhour, Egypt
Worldwide
JavaScriptPHPLAMP StackClient Server ModelsSoftware as a ServiceLaravelNode.jsPHP DevelopmentSolution ArchitectureSystems DesignTypeScriptModel-Driven ArchitectureTest-Driven Development (TDD)Event-driven ArchitectureReact.js
Senior Backend Developer & Technical Lead | Distributed Systems & SaaS Architect
I am a Senior Backend Developer and Technical Lead with over 10 years of experience designing, building, and scaling high-throughput backend systems, multi-tenant SaaS platforms, and distributed architectures. I specialize in Domain-Driven Design (DDD), Hexagonal Architecture, and modernizing complex monolithic systems into resilient, modular platforms.
Equally proficient in TypeScript/Node.js and modern PHP, I bridge the gap between high-level architectural design and hands-on execution—from engineering payment engines and concurrency-safe booking systems to shipping AI-assisted developer workflows.
Core Technical Expertise- Backend & Runtime: Node.js, NestJS, TypeScript, PHP 8.x, Laravel (Octane / FrankenPHP), Next.js, RESTful APIs, GraphQL.
- Architecture & Patterns: Modular Monoliths, Domain-Driven Design (DDD), Hexagonal Architecture (Ports & Adapters), Event-Driven Architecture, Microservices & Service Isolation, C4 Model Documentation.
- Databases & Messaging: PostgreSQL (advanced schema design, multi-tenant isolation), ClickHouse (analytics/aggregations), MySQL, Redis (caching, distributed locking, atomic Lua scripting), RabbitMQ.
- Payments & Integrations: Custom payment abstraction layers, multi-tenant routing with Stripe Connect, Stripe, PayPal, Paymob. Author of the published open-source @aboalynx/payment engine for NestJS.
- DevOps, Cloud & Infrastructure: CI/CD pipelines (GitHub Actions), Docker, Linux, Laravel Cloud / Forge, Cloudflare, Edge computing/relays, npm package publishing.
- AI & Automation: LLM integration, Anthropic APIs, Vector databases, RAG pipelines, semantic search, AI-driven visual workflow builders.
- Quality & Testing: Test-Driven Development (TDD), Spec-Driven Development, Pest, PHPUnit, Jest, Playwright.
- Technical Leadership & SaaS Architecture: Led cross-functional teams of up to 14 engineers (frontend, backend, QA, security) delivering production-ready, multi-tenant SaaS platforms featuring database-per-tenant isolation and strict architectural boundaries.
- High-Concurrency Systems (Sports & Entertainment): Built enterprise booking and ticketing engines handling high-volume surges (12,000–20,000 spectators per match) for Saudi government entities, incorporating concurrency-safe distributed seat selection powered by Redis and PostgreSQL.
- Data Pipelines & Analytics: Architected end-to-end telemetry and behavioral event capture pipelines utilizing edge relays, RabbitMQ queues, and ClickHouse for heavy aggregation workloads.
- Enterprise Modernization: Led legacy monolith refactoring into modular, clean architectures, boosting throughput via modern runtimes (Laravel Octane) and raising backend test coverage to over 80%.
Available for technical lead roles, backend system design, performance optimization, and custom SaaS architecture contracts.
Experience
Professional experience10+ years
Freelancer since2015
Languages
EnglishGood