Sherif Z.

I build SaaS products and mobile apps where the hard part is the logic, not the screens: billing that has to reconcile, business rules that have to be right, and AI features that have to behave consistently in production. My main recent work is a fleet compliance platform where I've been the technical partner, not just the developer. I built it end to end in Next.js, from the dashboard and API to Stripe billing with ACH payments, and the client had me scope each new phase myself. Most of the valuable work there came from production edge cases: keeping invoices in sync with Stripe, fixing activation logic that flagged the wrong vehicles, and separating "ready" from "compliant" so customers saw accurate status. On the AI side, I build LLM features into real products. On Skin Cipher, a React Native skincare app using the Gemini API, calling the model was the easy part. The real work was making its results consistent enough to trust, which started with checking image quality before anything reached the model. I also worked on the frontend of Due, an AI due diligence SaaS. Other recent work includes a point-of-sale system with a Go backend and Next.js admin dashboard. My stack is TypeScript end to end: Next.js and React on the web, React Native with Expo for mobile, Node.js (NestJS or Express) or Go on the backend, and PostgreSQL with Prisma. If your project sounds like a fit, send me a short overview and I'll tell you honestly whether I'm the right person for it.