Commerce Integration Engineering
Every system, one source of truth.
Storefront, ERP, OMS, WMS, PIM, POS, 3PL, marketplaces, tax, and payments — connected through one event backbone with clear ownership, the right cadence per flow, and retries that page a human when they fail.
Where integrations break
Four failure modes we have all seen.
Integration debt is quiet until peak. Then a dropped sync becomes oversold inventory and a refund queue.
Point-to-point sprawl
Every system wired directly to every other. N systems, N-squared connections, and no one place to see what flows where.
No source-of-truth rule
Two systems both think they own inventory. They drift, and the storefront shows a number neither one agrees with.
Silent failures
A sync drops at 2am, retries nothing, alerts no one. The gap is found days later in a mismatched report.
Real-time everything
Batch-friendly data forced into real-time pipes — expensive, fragile, and no faster where it does not matter.
One backbone, not spaghetti
Publish once. Subscribe anywhere.
Systems emit events to one bus; consumers subscribe to what they need. Ordered, retried, and dead-lettered when a downstream is down.
Who owns what
A source-of-truth map, not a guess.
Every integration starts here: one owning system per entity, explicit subscribers, a cadence chosen on purpose, and a defined failure path. This is the contract the event backbone enforces.
| Entity | Owning system | Subscribers | Sync cadence | Failure handling |
|---|---|---|---|---|
| Inventory | OMS / ERP | Storefront · Marketplaces · POS | Real-time (event) | Retry + DLQ, last-good cache |
| Orders | OMS | ERP · WMS / 3PL · Finance · CRM | Real-time (event) | Idempotent upsert, replayable |
| Products / Catalog | PIM | Storefront · Marketplaces · Search | Batch + on-change | Versioned, diffed before publish |
| Pricing & promotions | ERP / Pricing svc | Storefront · POS · Marketplaces | Real-time + scheduled | Brand-floor guardrail, rollback |
| Customers | CRM / CDP | Storefront · Marketing · Support | Real-time (event) | Merge rules, dedupe, audit log |
| Fulfillment status | WMS / 3PL | Storefront · OMS · Customer support | Webhook (event) | Retry + nightly reconcile sweep |
Illustrative of a typical commerce topology — the exact map is built from your systems in week one.
How we build it
Ownership, cadence, observability.
Source-of-truth rules first
Before a line of integration code, we map which system owns each entity — product, inventory, price, order, customer, fulfillment.
Real-time vs batch by design
Inventory and orders move in real time; catalog and reporting move in batch. Each flow gets the cadence it actually needs.
Monitored, retried, observable
Every flow has retries with backoff, a dead-letter queue, and an alert. A failed sync pages someone, it does not hide.
One integration layer
An event backbone, not point-to-point spaghetti — so adding the next system is one connection, not ten.
Source-of-truth mapping is step one of every build — see how we do it on the data foundation page. And because the silent failure is the expensive one, every flow reports into MetriQ, our anomaly-detection layer — an AI model learns each sync's normal rhythm and pages the team when volume, latency, or error rate drifts, before a mismatched report finds it days later.
Not listed? If it has an API or a flat-file drop, we have connected something like it.
Where we built
One event backbone across 4 brand tenants.
60M+Events processed per day — sub-second freshness on hot-path metrics, no point-to-point wiring
Read the case studyAI-assisted QA included.
Tests aren't a separate line item — they're how engineers ship covered code. Lower QA budget, faster feedback, better coverage than traditional QA cycles.
Auto-generated E2E
Playwright + LLM scaffold tests from product flows.
Self-healing selectors
Tests don't break when copy or DOM shifts.
Production replay
Real traffic patterns become regression suites.
PR-level impact
Only the relevant tests run on each diff.
How an engagement starts
Three steps to a partnership
Intake call
30 minutes. We listen, you talk. No deck.
Diagnostic
We audit the surface, name the bottleneck, propose a path.
Kickoff
Senior engineer in your standup by week two.