API and systems integration make the tools you already pay for talk to each other

Most businesses do not have a software problem. They have a translation problem. The website captures a lead someone retypes into the CRM. The CRM closes a deal someone retypes into the accounting package. The order that shipped this morning gets marked shipped in three places, on three days. Every one of those tools works. None of them talk.

The second version of this problem is worse, because it looks solved. A sync existed, it ran fine for months, then a rate limit or a renamed field quietly stopped it. Nobody noticed until the month-end numbers were wrong. Integration is not hard because connecting two APIs is hard. It is hard because staying connected is.

What integration means in our hands

We design for the failure, not the happy path. Third-party APIs go down, throttle you, rename a field, or accept a request and lose it. Every integration we ship carries idempotency keys so a retry cannot double-charge or duplicate an order, backoff that respects published rate limits, a queue for repeated failures, and an alert to a human when something needs attention. Silent failure is the one unacceptable outcome.

Reconciliation, not just sync. Sync moves records. Reconciliation proves both sides agree. We build a scheduled check that compares the two systems on the fields that matter and reports the drift, so a discrepancy surfaces the next morning, not at year end.

APIs documented for the developer who did not build them. When we build your API you get versioned endpoints, an OpenAPI specification, authentication that is not a shared password, sandbox credentials and a changelog, so your partner or your next developer can integrate without booking a call with us first.

The stack and the approach

TypeScript end to end, in the same Next.js 16 codebase as the product where that makes sense. Postgres holds the sync state, the event log and the reconciliation history, so there is no integration SaaS to rent forever and no black box sitting between your systems. Queues and scheduled jobs handle retries and backfills; credentials live in environment configuration, never in the repository.

Where a legacy system offers nothing but a database, an SFTP drop or a nightly CSV, we bridge it: an adapter presenting a clean, modern interface to everything downstream while the old system keeps running untouched. That buys years of breathing room, and it is often the honest alternative to a rebuild nobody has budget for.

What this looks like in practice

Wiring the tools a business already pays for. Website and phone leads land in the CRM automatically; a closed deal creates the invoice in the accounting package; the payment reconciles against it; the shipment writes tracking back to the customer record. Staff who used to retype data spend that hour on customers instead. Frequently paired with a CRM build or an ecommerce store.

Building the API other systems consume. A business with a mobile app, a partner network or a franchise group needs one documented, authenticated, rate-limited API instead of five bespoke exports. We design the contract, build it, document it, and wrap it in monitoring so you can see who calls what. Usually part of a wider custom software or webapp build.

Pricing

Integration work is scoped per project. Two modern APIs and a nightly sync sit at one end; a legacy ERP, a payment provider and eleven years of history to reconcile sit at the other. We scope after a short call, then quote a fixed price against a written specification. Ongoing monitoring can ride on a Care Plan. Contact us for a quote.