React Native Developer for Solar & EV E-commerce Mobile App (Expo, Supabase, Razorpay)

Description: We're building Voltara Energy, a mobile app for selling solar panels and EV chargers to customers in India. The design system already exists in Figma (dark navy and mint green theme), and we need an experienced React Native developer to build the app end to end. Core features include: Product catalog with filters (capacity, brand, price, subsidy eligibility) Solar calculator that estimates system size, cost, and savings Product detail pages with specs, gallery, and add to cart Cart and checkout flow, including a booking-deposit model for full solar systems Address management with pincode auto-fill and map pin support Razorpay payment integration (UPI, cards, netbanking, EMI) Order tracking with a multi-stage status timeline Subsidy information section with document upload Profile and authentication (Clerk) Tech stack: React Native (Expo SDK 52), TypeScript, Expo Router, Zustand, TanStack Query, Supabase, Clerk, Razorpay, NativeWind. A full functionality specification document is attached, covering every screen and feature in detail. Please review it and submit a phase-wise estimate (setup and core screens, cart and checkout, order tracking and profile, testing and store submission), along with your recommended timeline. What we're looking for: Proven experience with Expo-based React Native apps, ideally with e-commerce or payment flows Experience integrating Razorpay or similar payment gateways in a mobile app Comfort working with Supabase or a similar backend-as-a-service Ability to match an existing Figma design system closely Clear communication and ability to flag scope or timeline risks early