Mohamed E.

Fractional CTO specializing in fintech architecture, payment gateway integration, FreeSWITCH/VoIP and telecom regulatory integrations, .NET Core / Microsoft Azure systems, and Claude-based AI agents. I design, fix and ship systems that move money, data and calls reliably. For 25 years I've worked across payments, fintech, telecom and e-commerce, both as the person writing the architecture and as the person accountable for it in production. PAYMENTS & FINTECH ● Early engineering team at Fawry, Egypt's largest payments network ● CTO of CowPay, an Egyptian payment gateway ● Author of payment gateway and payment-split specifications used to build production systems E-COMMERCE ● CTO of Gahez Market (2021–2023). Built a custom ERP on .NET and Azure Functions (42,000+ lines) that is still in production. TELECOM & REGULATORY INTEGRATIONS ● Number portability with Saudi CST (SOAP), e& UAE Do-Not-Call (DNCR), and DID lookup for a Gulf telecom operator, all on Microsoft Azure with .NET ● A FreeSWITCH phone-masking platform for a leading Saudi delivery app: multi-tenant, with webhooks and call recording AI ● RAG pipelines, LLM fine-tuning, Claude-based agents and skill systems, including an investment-memo generation system for an asset manager HOW I CAN HELP ✔ Architecture and security reviews of payment and fintech platforms ✔ Payment gateway integration, wallet and payment-split design ✔ FreeSWITCH / VoIP and telecom regulatory integrations ✔ Microsoft Azure / .NET Core backend and serverless systems ✔ AI integration: Claude agents, RAG over your documents and databases ✔ Fractional CTO: technical due diligence, roadmaps, rescuing stalled projects HOW I WORK I gather evidence (logs, data, code) before proposing fixes. You get a written plan before I build, small reviewable deliveries, and clear updates. Based in Cairo, so my working day overlaps fully with the Gulf, Europe's afternoon and evening, and the US morning. Have a payment platform to review, a telecom integration to ship, or a stalled project to rescue? Invite me to your job or send a message, and we can start with a short call.