I need a full-stack developer to take an Android e-commerce idea from concept to a polished, production-ready release. The app will let users browse, select, and purchase on-demand services rather than physical goods, so smooth scheduling logic, dynamic pricing, and a streamlined checkout flow are essential. Core scope • Design the UI/UX for an intuitive service marketplace. • Build the Android front end (Kotlin or Java—your call, as long as it follows modern MVVM or MVI patterns). • Develop the back end and API layer to handle user accounts, service listings, cart, orders, reviews, and push notifications. Firestore, PostgreSQL, or a similar scalable store works; I’m open to your recommendation. • Set up basic admin tools so I can add, edit, or remove services without touching code. Deliverables 1. Full Android source code in a private repo, clearly documented. 2. Deployed back-end (cloud or on-prem) with environment scripts. 3. One signed release APK plus a debug build for future iterations. 4. A short hand-off guide covering build, deploy, and maintenance steps. Acceptance criteria • Users can register, log in, browse services, add to cart, check out, and view order history without crashes or major UI glitches. • Payments process successfully in sandbox and live modes. • All network calls respond in <2 s on a 4G connection. • Code passes a quick review for clean architecture and lint compliance. If you have prior examples of service-based commerce apps, link them along with a rough timeline for each milestone so we can move forward quickly.