B2B wholesale ordering app

Distributors often take orders through phone calls, WhatsApp messages and salesperson visits, then retype them into accounting software. That creates familiar problems:

• orders keyed in twice, with case and piece quantities mixed up
• price lists that differ by retailer tier and change with every scheme
• credit limits tracked in spreadsheets, so dues are checked after dispatch rather than before
• GST invoices raised separately, which delays dispatch
• no single view of outstanding payments for the sales team

• Retailer app: one-tap reorder from past orders, a catalogue with case, inner-pack and piece units, minimum order quantities, tier prices and slab discounts calculated live, and the outstanding balance and credit limit shown at checkout.
• Sales mode: field staff place orders on a retailer's behalf during market visits, even offline, and the order syncs when the phone reconnects.
• Distributor admin: price lists and trade schemes with effective dates, credit rules, an approval queue for orders that break limits, dispatch batching and GST invoices.
• Payments: retailers clear dues by UPI or netbanking through payment links that update the ledger.

• App: React Native, with retailer and sales roles in one codebase and an offline order queue on the device.
• API: Node.js on PostgreSQL. One pricing service resolves tier price, slab discount and scheme, and recalculates at confirmation so a stale cart cannot lock in an expired price.
• Ledger: orders, payments and credit notes post to a ledger that drives balances and credit checks.
• Integrations: Razorpay payment links and webhooks; e-invoice IRN generation through a GST Suvidha Provider where turnover requires it; a scheduled sync with Tally or the existing ERP.
• Hosting: Redis caches price lists per tier; services run on AWS.