Syed Arslan A.

Most mobile apps don't fail on features. They fail in the first week: a crash, a rejected build, a broken paywall. I'm a Flutter and React Native developer who ships crypto wallets, fintech and AI apps to the App Store and Google Play, and keeps them working after launch. Top Rated on Upwork with $100K+ earned. "Syed was excellent to work with throughout the project. He was professional, responsive, patient and always willing to work through feedback and changes as the project evolved." - Flutter freemium app client, August 2026 I'm Syed Arslan, Tech Lead at Nextsense Solutions (UAE registered). I own the mobile app end to end, and our senior team covers backend, AI and Web3 when your product needs more hands. WHAT CLIENTS HIRE ME FOR - Crypto and fintech wallets: non-custodial wallets, Stripe payments, KYC flows, trading screens and multi-chain support on XRPL, Solana and Ethereum. - Flutter and React Native apps: iOS and Android from one shared codebase, from MVP to production rewrite. - AI mobile apps: OpenAI and Claude API features, AI chatbots, generative image and video, and LLM features built into the app. - Subscriptions and in-app purchases: RevenueCat, StoreKit and Play Billing, paywalls, freemium models and premium access checks. - Real-time features: live data over WebSockets, in-app chat, push notifications, geolocation and offline-first screens. - App Store and Play Store launch: store setup, review submissions, rejections fixed and releases shipped on both stores. RECENT RESULTS - Freemium Flutter app shipped with RevenueCat subscriptions and Firebase, approved on both stores. - AI generative media app for iOS and Android with a UGC and ads engine. - iOS sports and crypto prediction market app, built and delivered as a $12K+ engagement. - Healthcare app with a non-custodial XRPL wallet and secure transaction flows. - React Native trading app with live market data, in-app chat and a Solana wallet in one codebase. I work best with founders who have a clear product and a launch date, and need a senior mobile developer who can take it all the way to the stores. Send me your app idea, Figma file or current codebase. I reply within a few hours with a technical plan and an honest timeline. TECH AND SERVICES MOBILE: Flutter, Dart, React Native, TypeScript, iOS and Android app development, cross-platform apps, MVP development, mobile app bug fixes. AI MOBILE: AI app development, OpenAI API, Claude API, LLM integration, AI chatbots, LangChain, RAG, generative AI. MONETIZATION: In-app purchases, RevenueCat, StoreKit, Google Play Billing, Stripe, subscriptions and paywalls. FINTECH AND WEB3: Crypto wallet development, non-custodial wallets, XRP Ledger, Solana, Ethereum, Solidity, WalletConnect, KYC. BACKEND: Firebase, Supabase, Node.js, NestJS, REST APIs, GraphQL, WebSockets, PostgreSQL, MongoDB.