Retail operations run on data flowing between systems. When that flow breaks, the business breaks.
POS, inventory, e-commerce, ERP, loyalty — retail businesses run more interconnected software than almost any other vertical. A custom API layer built for your specific system stack moves data reliably, handles the edge cases that off-the-shelf connectors miss, and gives you a data integration layer you control. Fixed scope, fixed price.
Your retail business has inventory, POS, e-commerce, and CRM systems that don't talk to each other — and the manual reconciliation or patchwork integrations that bridge them are generating errors and consuming staff time.
Multi-location retail operations have a data integration problem that only gets worse as the business grows. The POS at each location captures sales data, but that data isn't automatically flowing to the central inventory system — so the inventory numbers used for purchasing decisions are always a day or a week out of date. The e-commerce platform processes orders, but the inventory allocation isn't reflected in the in-store POS until someone manually updates it — leading to oversells. The loyalty program tracks points, but the POS doesn't read from the loyalty system in real time, so the cashier has to ask customers to check their app.
Each of these disconnects has a direct cost: the inventory purchasing errors (buying stock you already have, or failing to reorder stock you've run out of) are the most expensive, typically running 2–5% of annual inventory cost for businesses without real-time inventory sync. The oversell rate on e-commerce for businesses without real-time inventory sync runs 0.5–2% of orders, each requiring manual cancellation and customer service.
The off-the-shelf integration solution (Zapier connectors, built-in integrations) works for simple data transfer but fails on the retail-specific edge cases: the product variant that has a different SKU in the POS vs. the e-commerce platform, the multi-location inventory allocation logic that needs to route fulfillment to the closest location with stock, and the promotional pricing rules that need to apply differently in-store vs. online.
A custom API integration layer that connects your retail systems reliably — syncing inventory, orders, customer data, and pricing across your stack without the manual reconciliation that's currently burning staff time.
Inventory sync API
Real-time inventory sync across POS (Square, Lightspeed, Shopify POS, Clover), e-commerce (Shopify, WooCommerce, BigCommerce), and warehouse/ERP. SKU mapping for variants that have different identifiers in different systems. Multi-location inventory with location-aware allocation logic.
Order routing and fulfillment API
Order intake from all channels (e-commerce, in-store, phone) routed to the optimal fulfillment location based on inventory availability and proximity to the customer. Order status sync back to the originating channel.
Customer data sync
Customer profile synchronization across POS and CRM, with deduplication logic for customers who appear in multiple systems. Purchase history consolidated across channels.
Pricing and promotions API
Centralized pricing management with sync to all channels. Promotional pricing with start/end dates and channel-specific rules. Price override audit trails.
Reporting data pipeline
Consolidated reporting data from all channels (in-store, online, wholesale) aggregated into a unified reporting layer for management dashboards and buying decisions.
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
A custom API integration layer that connects your retail systems reliably — syncing inventory, orders, customer data, and pricing across your stack without the manual reconciliation that's currently burning staff time.
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Integration projects with undefined scope are the classic billing runaway. Fixed scope with defined integration endpoints and data contracts.
Related engagements.
Questions, answered.
The specification process documents the SKU mapping between each system pair. The integration API maintains a mapping table that translates between the identifiers used in each system. For mismatches discovered during the build, the mapping table is updated during the specification phase — before development starts, not as a mid-project discovery.
All integrations are built with API version pinning where the connected system supports it. For systems that don't version their APIs, the integration includes monitoring that alerts on response schema changes. When a connected system changes their API, the integration update is a scoped change order.
Most ERPs have either a REST API, a SOAP API, or a database-level integration option. The integration approach depends on what the ERP exposes. ERPs that only offer database-level access (direct DB connection) are integrated via a read replica with a custom sync layer.
Two-system integrations (e.g., POS + e-commerce inventory sync): $18k–$28k. Multi-system integration layer (3+ systems): $30k–$55k. Fixed-price.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.