Custom Software for Retail & D2C E-commerce

Because each system keeps its own count and reconciles on a schedule. A retail ERP fixes it by making one of them authoritative and turning every movement into an Event-Driven Architecture record — receipt, pick, sale, return, adjustment — posted to a single PostgreSQL ledger under Drizzle ORM that every channel reads. Once availability is derived rather than stored, the discrepancy stops being a nightly report and becomes impossible by construction — 1 ledger, 3 channels, 0 reconciliation jobs.

Yes, and the integration direction matters more than the connector. ERPStack pulls orders and pushes availability through each channel's REST API, but the retail ERP holds the stock ledger, the pricing rules and the customer record in PostgreSQL, so a marketplace outage degrades a channel rather than the business. Idempotency in API Design is the rule, keyed by the channel's own order identifier, so a replayed webhook cannot double-book a retail sale.

Separate the read path from the write path. Catalogue and availability are cached in Redis and served from the Next.js edge, so browsing scales horizontally; order placement goes through a queue with idempotency keys and a reservation step, so PostgreSQL sees a steady write rate rather than a spike. For most retail brands that is the difference between an autoscaling bill in November and an outage during the one hour that matters: PostgreSQL sees the same 200 writes a second on 28 November as on any Tuesday.

It should. If card data goes from the browser or terminal straight to the payment provider and your systems only ever hold a token, the retail environment stays largely out of PCI DSS v4.0.1 scope and the assessment covers the segment that touches the vault. The 51 future-dated PCI DSS v4.0.1 requirements have been mandatory since 31 March 2025, and payment-page script integrity is the one that most often changes how a Next.js storefront is deployed.

They only work if identity is resolved first. A retail business typically holds the same person as a marketplace pseudonym, a loyalty member and a guest checkout; a deletion request covers all three. ERPStack builds an identity graph in PostgreSQL so a verified request fans out across every table and channel export, inside the 45-day response window with its single 45-day extension and the 12-month look-back, and leaves an Immutable Audit Trail record proving what was removed. Scope starts at $26,625,000 of revenue or 100,000 consumers.

A tighter breach clock and a stricter consent story. A notifiable personal data breach has to reach the supervisory authority within 72 hours of awareness, and marketing consent has to be evidenced per purpose rather than assumed from a purchase. For a retail brand selling into both markets ERPStack keeps one PostgreSQL consent model with jurisdiction flags, because maintaining two divergent customer schemas is where the real GDPR and CCPA cost appears. A California breach now runs a 30-day clock; more than 500 residents adds a 15-day filing.

Usually, until the app count passes about a dozen. Each app adds a monthly fee, a data copy and a failure mode, and the ones that matter — inventory allocation, purchasing, wholesale pricing — are exactly the ones that fit worst. Oracle NetSuite and Microsoft Dynamics 365 solve some of it at a licence cost most retail brands under $50 million will not carry. The honest test for a retail brand is whether the operational logic is a differentiator. If it is generic, stay on the platform; if it is the business, own it.

The code, the database and the cloud account. A retail ERP from ERPStack is deployed into your own AWS or Microsoft Azure subscription on Next.js, TypeScript and PostgreSQL, the source is delivered under your licence, and there is no per-seat fee — so adding warehouse staff, drop-ship partners or a B2B wholesale portal costs engineering time rather than licences. That is the main structural difference from a per-user SaaS suite.