SupplySync Enterprise Operations & Inventory Engine
Multi-warehouse stock management, supplier purchase order workflows, and real-time inventory tracking replacing fragmented spreadsheets.
Background & Operational Scope
A regional wholesale distributor managing 4 warehouses, 3,200+ SKU lines, and 80+ daily supplier deliveries struggled with manual ledger updates, delayed inventory counts, and frequent stockout discrepancies.
Operational Bottlenecks
Stock counts were reconciled manually at the end of each week, resulting in overselling, inaccurate purchase orders, and hours spent tracking down missing inventory across locations.
Engineering Complexity
Needed a high-concurrency relational data model that enforced strict ACID transaction guarantees for simultaneous warehouse bin updates, multi-currency vendor purchase orders, and barcode scanning without race conditions.
Architectural Implementation
ByteLab Infotech architected a custom web-based ERP with a Java 21 & Spring Boot backend, PostgreSQL database with row-level locking, and a responsive React frontend with offline barcode scanner integration.
Layered Spring Boot & PostgreSQL Transaction Pipeline
Structured around Domain-Driven Design with isolated services for Inventory, Procurement, and Warehouse Dispatch.
- Spring Boot 3.2 REST API with Spring Security RBAC
- PostgreSQL 16 with optimistic locking and B-Tree indexing on SKU lookups
- React + TypeScript responsive management portal
- Automated background worker for low-stock replenishment alerts
- Nginx reverse proxy on hardened Ubuntu Linux server
Key Capabilities Delivered
- Real-time bin-level inventory tracking across 4 physical warehouses
- Automated Purchase Order (PO) generation based on minimum threshold rules
- Role-based access control for Warehouse Clerks, Managers, and Finance
- Instant PDF invoice and dispatch slip generation with QR verification
- Audit trail logging every inventory movement with timestamp and user ID
Measurable Business Outcomes
- Eliminated manual weekly paper reconciliations by enabling real-time stock sync upon scan
- Prevented inventory overselling across warehouse locations through transactional locking
- Cut purchase order generation time from multiple hours down to one-click approval workflows
- Maintained 100% auditable history for all stock transfers and adjustments
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