eMerchantBooks

Custom integrations and ops engineering, from your accounting firm

We're the accounting firm that also writes software. Custom integrations, workflow automation and operations tooling for $100K+/mo brands whose tool stack stopped fitting off-the-shelf connectors.

Ecommerce operations engineering workstation with code and workflow diagrams beside shipping boxes

Every established seller runs a stack: marketplaces, an ERP or accounting file, a 3PL or WMS, repricers, a returns pipeline, spreadsheets gluing it together. Somewhere around $100K a month the off-the-shelf connectors stop covering the gaps, and the ops team starts burning hours on exports, re-keying and reconciliation scripts someone's cousin wrote in 2022.

No other accounting firm can fix that; they don't employ engineers. We do. And because we also keep your books, the integrations we build are accounting-aware from day one: the data lands clean, reconciled and audit-ready instead of creating the next mess.

The gaps we get hired to close

Systems that don't talk

Your 3PL knows inventory, your ERP knows cost, your marketplace knows sales, and nothing agrees at month end. We build the sync layer with reconciliation built in, so one number is the number.

Manual workflows eating your team

Order routing, PO creation, returns triage, settlement downloads, reprice-and-relist loops: if a person does it in a browser every day, it can usually be automated in a week and paid back in a month.

Reporting your tools refuse to produce

SKU-level contribution margin across channels, landed cost by container, channel cohort dashboards, exec scorecards. Off-the-shelf analytics stops where your questions start. Custom reporting picks up from there.

What we do every month

  • Custom marketplace/ERP/3PL integrations built and maintained
  • Workflow automation for daily ops processes
  • Custom dashboards and reporting on your real data
  • Settlement and payout data pipelines, accounting-aware
  • Inventory sync with reconciliation checks built in
  • Migration support (QBO to NetSuite, 3PL changes, replatforms)
  • Scoped fixed-fee projects, documented and handed over
  • Ongoing support retainer if you want it, not required

Why an accounting firm is the right builder

Generic dev shops build what you spec and leave when it ships. The problem is that ops integrations live or die on accounting details the spec never mentions: fee mapping, refund timing, inventory valuation, cutoff discipline. We carry those requirements in by default because your month-end close depends on them, and we're the ones doing it.

Projects are scoped fixed-fee with a written spec, built, documented and handed over. You own the code, the same way you own your books.

Where this pairs with accounting engagements

Integration clients don't have to be accounting clients, but the pairing is where the leverage is: the same team that closes your books by day 10 also owns the pipelines feeding them, so data problems get fixed at the source instead of patched every month. For Exit-Grade clients, clean automated data flows are themselves a diligence asset; buyers pay for operations that run without the founder's spreadsheets.

Closed by day 10, or 50% off

Your prior month is reconciled and delivered by the 10th business day, guaranteed in writing. Miss it and that month's fee is half price. No competitor guarantees anything.

You own your books

We work inside your QuickBooks, Xero or NetSuite file, not ours. Leave any time and everything stays with you, diligence history included.

Exit-grade, always

Accrual books with landed-cost COGS and a maintained addback schedule. If a buyer or lender called tomorrow, your books would be ready.

Published pricing, no lock-in

Our full rate card is on the website and engagements run month-to-month. Every ecommerce-exclusive competitor hides pricing behind a sales call. We don't.

Integrations & ops engineering FAQs

What does a custom integration project cost?

Scoped fixed-fee after a short discovery. Small automations run low four figures; multi-system integration projects run five. You get the number in writing before anything is built, and there's no obligation to be an accounting client.

What systems have you worked with?

Marketplace APIs (Amazon SP-API, Walmart, eBay, Shopify), QuickBooks, Xero, NetSuite, common 3PL/WMS platforms, and the long tail of internal tools and spreadsheets that actually run ecommerce companies. If it has an API or an export, it can usually be wired in.

Who owns and maintains what you build?

You own the code and the documentation outright. Maintenance is an optional retainer; several clients run what we built with no ongoing involvement from us at all.

Can you fix the integration mess a previous developer left?

Usually, and we'll tell you honestly when a rebuild beats a repair. The audit is the same either way: map what exists, find where the data breaks, and quote the fix flat.

We'll do last month's books free, and show you what your bookkeeper missed

The free Ecommerce Books Audit: connect read-only access and within 3 business days you get a clean month of books plus a 10-minute recorded teardown of every margin leak, COGS error and sales-tax risk we found. Keep it all, even if you never hire us.

  • ✓ Books closed by day 10, guaranteed in writing
  • ✓ Everything stays in your QuickBooks, Xero or NetSuite file
  • ✓ Published pricing, month-to-month, no lock-in
Where do you sell?

No commitment. A partner replies within one business day.

For $100K+/mo ecommerce brands

Day-10 close guarantee · published pricing

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