Multiplatform Marketplace App Development

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About this role

Mobile App Development, Android, App Design, iOS Development, Payment Gateway Integration, React Native, Flutter, Chatbot, Database Management, App Development · I want to launch a simple yet reliable buy-and-sell app that works on both iOS and Android. Users will be able to list brand-new, pre-owned, and even refurbished items, then choose whether the deal happens through local pick-up or postal delivery.

Key flows I need covered include: • Quick registration via Gmail sign-in or mobile number OTP verification (no lengthy forms). • A clean catalogue where sellers upload photos, set prices, and flag listings as “pick-up” or “post.” • Two payment paths—online checkout (any standard gateway is fine) or cash handed over in person. • A “Chat on WhatsApp” button that opens a direct conversation between buyer and seller for last-minute questions.

Because this is a small operation, the build should stay lean: a single codebase (Flutter or React Native is perfect), a lightweight admin console where I can suspend users or edit listings, and straightforward deployment to both app stores.

Deliverables I expect – Full source code with clear setup instructions – iOS and Android release builds, ready for TestFlight / internal testing – Basic web-based admin panel – One short hand-off session walking me through publishing and day-