Codescap ERP: High-Throughput Warehouse & Distribution Engine
Multi-tenant ERP with native Electron billing, sub-millisecond local SQLite catalog queries, and durable outbox queues for wholesale distributors.
Key Project Metrics and Results
01 / System Overview
Background & Problem Space
Warehouse wholesale distributors operate in fast-paced, dusty, and network-unreliable loading docks where clerks bill thousands of bulk items daily. Codescap ERP delivers the raw speed of legacy terminal software combined with the analytics and multi-tenant security of modern cloud architecture.
02 / Technical Challenge
Core Bottlenecks
In high-volume warehouses, every millisecond an invoice takes to render costs truck turnaround time. Wholesale clerks refuse to touch a mouse; they require complete numpad and shortcut key workflows. Furthermore, cloud ERPs lose bills when loading dock Wi-Fi drops.
03 / Engineering Solution
Architectural Approach
We designed Codescap ERP on three uncompromising principles: reads never touch the network (the entire product catalog is in local SQLite), writes never block the clerk (bills commit instantly to a local outbox queue), and tax invoice numbers are allocated safely on-device in gapless series.
04 / Architecture Breakdown
Key Engineering Decisions
A high-performance Electron billing workstation that synchronizes bidirectionally with a Fastify and Drizzle ORM backend backed by PostgreSQL, managed through an executive Next.js administrative PWA.
Durable Outbox Queue: When a clerk strikes Enter, the invoice saves locally, fires to the printer, and releases the cursor for the next customer in under 10ms.
Shared Billing Math Contract: Shared TypeScript Zod schemas and calculation modules imported across client and server eliminate floating-point rounding drift.
Zero-Latency Hotkeys: Custom shortcut registry enabling search, item selection, tax exemption, and multi-mode tender without touching a mouse.
05 / Delivered Ecosystem Modules
Full Multi-Module System (4 Applications & Services)
Every client, role, and stakeholder received a purpose-built application engineered for their specific workflow.
Electron Desktop Fast Billing Client
Native desktop workstation application designed for rapid keyboard data entry, live stock validation, and instant invoice printing.
Technical Highlights:
- ✦Sub-millisecond item lookup
- ✦Dual GST & non-GST billing modes
- ✦Customer running balance check
Durable Offline Outbox Sync Engine
Reliable background worker daemon that buffers saved transactions during outages and flushes them in idempotent order when connectivity resumes.
Technical Highlights:
- ✦Zero dropped transactions
- ✦Conflict-free gapless sequencing
- ✦Network throttle detection
Next.js Executive Admin & Reports PWA
Responsive web portal for warehouse managers and accountants to review multi-warehouse inventory levels, customer aging reports, and profit margins.
Technical Highlights:
- ✦Real-time warehouse stock balance
- ✦Daily sales & tax audit reports
- ✦Customer credit limits control
Fastify + Drizzle PostgreSQL Backend
Ultra-fast API service enforcing tenant isolation, multi-tenant row security, batch synchronizations, and audit trail logs.
Technical Highlights:
- ✦High-throughput batch ingestion
- ✦Tenant-isolated database schema
- ✦Audit trail logging
Core Technology Stack
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