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# Zubair Hussain — Full-Stack Developer > Full-stack developer based in Hyderabad, Pakistan, and co-founder of Xovato Digital Agency. Builds web and mobile applications for clients in the US and Australia, with a focus on AI integration, real-time systems, and cross-platform mobile development. Primary stack: Next.js, React, React Native, Expo, Node.js, TypeScript, Python and FastAPI. Available for freelance and contract work on SaaS products, AI-integrated applications, and cross-platform mobile builds. ## Project write-ups - [Building PrivacyVault: a cross-platform privacy SaaS](https://zubair-xovato.blogspot.com/2026/03/building-privacyvault-cross-platform.html): Build write-up for a privacy-first SaaS with a Next.js 15 web dashboard and an Expo React Native mobile app sharing auth logic and theming. Covers tracker scanning, a client-side data locker, breach notifications against public APIs, and the decision to mirror Next.js App Router structure with Expo Router. Hon...