I have the 6amMart code-base (Laravel backend + Flutter apps) and need it reshaped into “LEOZIN”, a platform that serves both wholesale (B2B) and retail (B2C) customers. The job is pure core coding—no installation, no setup chat—just deep edits to existing logic so the script behaves exactly as outlined below and in the remaining pillars I’ll share once you’re shortlisted. Key objectives you will tackle right away • Enforce a mandatory GST-number lock during every B2B sign-up. • Build a Circle-Zone delivery engine for B2C orders; zones will drive slot visibility, charges and restaurant visibility. • Add a runsheet-based credential flow for delivery riders (they should authenticate only with the day’s sheet code). • Split the admin experience: one dashboard for Wholesale, one for Retail, each with its own roles and menus. • Integrate Razorpay and Cashfree side-by-side, selectable at checkout and within the admin refund panel. • Generate GST-ready invoices that respect HSN/SAC, tax slabs and rounding rules. • Provide advanced inventory tools for bulk orders, including pack-size mapping, minimum-order thresholds and FIFO stock deduction. Acceptance criteria 1. All new logic must sit cleanly inside the current Laravel services and Flutter provider architecture without breaking existing buyer / seller flows. 2. API docs updated where endpoints are added or changed. 3. Builds compile on the first run for Android, iOS and Web. 4. Unit or feature tests cover the critical paths above. 5. Delivery meets the 7-day window. If you have production instances of 6amMart you’ve already modified, send a link or APK—code speaks louder than chat. Once I see proof, I’ll release the full twenty-pillar specification and we can start.