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CASE STUDY // ENTERPRISE OPERATIONS
Multi-Branch Inventory & Operations Management System
A production internal tool that runs day-to-day operations for a retail business operating across multiple branches. Every unit of stock is tracked per branch through an immutable movement ledger, and every sensitive action (voids, write-offs, adjustments) passes through a manager approval workflow before it touches inventory.
Multi-branchStock tracked per location
5Reporting modules
100%Stock changes audited
The Operational Bottleneck
The business was reconciling stock across branches with spreadsheets and paper. Discrepancies between branches, unrecorded voids, untracked supplier deliveries, and no reliable view of profit per branch made it impossible to know what was actually on the shelves or who changed what.
The Engineered System
We engineered a role-based operations system on Next.js and PostgreSQL. Stock lives in a per-branch inventory table, and every change is written to a StockMovement ledger with before/after quantities, the reference document, and the staff member responsible. Purchase orders flow into partial or full receiving with idempotency keys so a double-submit can never double-count stock. High-risk actions raise approval requests verified by time-limited, hashed email codes, and a reporting suite breaks down sales, inventory, purchasing, profit, and movements by branch, date range, and sales rep.
ARCHITECTURE STACK
Next.js
TypeScript
PostgreSQL
Prisma
Supabase
Zod
Recharts
PWA
PRODUCTION DELIVERABLES
Per-branch inventory with an immutable stock movement ledger (before/after quantities on every change)
Purchase orders with partial receiving and idempotent submissions to prevent double-counted stock
Point-of-sale with void and return workflows tied back to the original sale
Manager approval engine with hashed, time-limited email verification codes and attempt limits
Reporting suite: sales, inventory, purchasing, profit, and movements by branch, date range, and sales rep with CSV export
Role-based access, JWT sessions, and a full audit log of who did what, where, and when
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