Systems IntegrationFixed-price project

Make the systems you already pay for agree.

Your POS, your accounting package, your CRM and the supplier portal that still emails a CSV at midnight. We join them up so the same number appears in every place it should, without a person in the middle.

2 – 5 weeks
scope to live
Fixed price
against a written scope
Week 1
every system mapped first

Who this is for

You probably need this if…

01

A person is the integration

Someone exports from one system and imports into another every morning. They are completely reliable until the week they take leave, and then nothing moves.

02

The same number is different in two places

Your POS says one thing and your accounting package says another. Reconciling them is somebody's entire Monday, every Monday.

03

A vendor promised it integrates

It does, in a demo, with clean data. Under your volume and with your edge cases the claim turned out to be considerably more complicated.

What we build

The work, in detail.

POS & retail platforms

Square, Toast, Clover, Lightspeed and Shopify, plus the older terminals that will only talk to something on the local network.

Payments & accounting

Gateways into QuickBooks, Xero or NetSuite, with the reconciliation layer that proves the money landed where the order said it would.

Identity & provisioning

SSO, SAML, OIDC and SCIM, so a new starter has the right access on day one and a leaver loses it the same afternoon.

Webhooks & events

Signed, replayable, idempotent delivery with a dead-letter queue that a human being can open, read and re-drive.

File-based interchange

SFTP, EDI and the nightly CSV a supplier will never stop sending. Parsed, validated, and alerted on the day the format quietly changes.

Continuous reconciliation

A scheduled job compares both sides and names the records that disagree. Finding drift in an alert beats finding it in an audit.

Failure handling

Retries with backoff, rate-limit awareness and queueing, so a partner's bad afternoon does not become an outage on your side.

Legacy bridging

A layer in front of a system that cannot be changed, giving new work a clean interface to build against without touching the old one.

How it runs

Four weeks, in order.

  1. Week 1

    Map

    A written inventory of every system: who owns it, what it can emit, what it refuses to, and where the real constraints are. Integrations fail on assumptions rather than on code.

  2. Week 2

    Build

    The primary flow, end to end, with idempotency and retry behaviour in from the start. Friday demo moving your real records between real systems.

  3. Week 3

    Harden

    Edge cases, failure paths, alerting and the reconciliation job. This is the week that decides whether it still works in six months.

  4. Week 4

    Ship

    Cutover with the manual process still running in parallel, monitoring live, and a runbook for the failures we already know about.

What you get, concretely

  • A written map of every connected system and what it owns
  • Live integrations with idempotent writes and signed webhooks
  • A scheduled reconciliation job with drift reporting
  • Alerting routed to your team, with a runbook per alert
  • Credentials in your secret manager, scoped and documented
  • Source code in a repository you own from the first commit
  • 30 days of post-launch fixes at no additional cost

Typical engagement

Fixed price · two to five weeks

Two systems with good APIs and six systems where one of them is a nightly CSV are genuinely different jobs. Week one tells you which you have, and the quote is fixed against the map.

Technology

What we build it with.

Defaults, not requirements. If you already run something else and have a team who knows it, we work in yours.

Commerce
Square, Toast, Clover, Shopify, Lightspeed
Finance
QuickBooks, Xero, NetSuite, Stripe
Identity
Auth0, Okta, Entra ID, SAML & OIDC
Transport
Webhooks, SFTP, EDI, message queues

Proof

We have built this before.

Not a reference we cannot name. Systems we designed, shipped and still operate, with the decisions written down.

All our work →

Questions

What people ask before signing.

The vendor says there is no API.
Sometimes true, sometimes it means there is no public documentation. We check the network traffic, the partner programme and the database directly. If there is genuinely no route in, you hear that in week one rather than in month two.
Can you do this without replacing our current systems?
That is usually the right answer and the cheaper one. A layer in front lets everything keep running while new work builds against a clean interface.
What happens when a partner changes their format?
Every inbound payload is validated and a failure raises an alert. You hear it from us before you hear it from a customer.
How do you stop duplicate records?
Every write is idempotent, keyed on something stable from the source. Networks retry and partners replay — a system that assumes single delivery will eventually double-post something that matters.
Who holds the credentials?
You do. They live in your secret manager, we request scoped access for the work, and it is handed back at the end of the engagement.
What if one system goes down?
The others keep working. Operations queue and retry, and reconciliation reports anything that did not make it once the connection returns.

Tell us which systems refuse to talk.

Name the tools and the handoff that keeps breaking. Week one establishes whether there is a route in, before you have committed to a build.

Reply time

One business day, from an engineer

Based in

Orlando, Florida · serving the United States

What happens next

  • A reply within one business day, from an engineer
  • A thirty-minute call, with no qualifying call before it
  • A written scope and a fixed number, if it fits