System Integration
Getting systems that were never designed to work together to share information reliably — in both directions.
The operational problem
Two systems hold the same fact and disagree, and the organization resolves the disagreement by having a person retype one into the other.
That person is the integration layer: they are the reason it works, they are on leave next week, and their error rate is nobody's metric.
The vendor's answer is a CSV export at midnight, which means the answer to 'is this current' is 'it depends what time it is'.
What we build here
The actual classes of system.
- Legacy system modernization
- API design and development
- ERP and CRM integration
- Payment and settlement flows
- Identity and single sign-on
- Event and webhook infrastructure
- Data reconciliation between systems
Our position
How we approach it
Integration is not plumbing, it is agreement. Two systems disagreeing about a customer is rarely a transport problem; it is that nobody ever decided which one is right, what a duplicate means, or what happens when a record arrives twice. We settle that first, in writing, with the people who own both sides. The code is downstream of the decision.
We assume delivery fails, because it does. Every integration we build treats a message arriving twice as a non-event, retries failures on its own, and checks both sides against each other — so a message that never arrives is visible to someone rather than discovered by a customer.
We refuse to rip out a working legacy system to make an architecture diagram tidier. It is running the business. We put a boundary around it, integrate against the boundary, and move capability across it piece by piece, where each piece can be reversed if it goes wrong. Modernization that cannot be rolled back is not a migration, it is a bet.
Capabilities
What that means in practice.
- Legacy modernization
- Incremental replacement behind a stable boundary. The old system keeps running until the new path has proved itself against it.
- API development
- Interfaces designed for the people who will consume them — versioned, documented, and with error responses that say what to do next.
- ERP integration
- Connecting operational systems to the system of record, including the reconciliation that proves the two agree.
- CRM integration
- One view of a customer across the systems that each hold part of them, with the merge and conflict rules decided explicitly.
- Payments
- Payment and settlement flows built around the reality that money moves asynchronously and confirmations arrive late, out of order, or twice.
- Authentication
- Single sign-on and identity across systems, so access is granted and revoked in one place rather than discovered during an audit.
- Platform & Language
- .NET · C# · TypeScript · Node.js
- Data
- PostgreSQL · SQL Server · Redis
- Cloud & Runtime
- Azure
- Protocols & Integration
- REST · gRPC · OAuth 2.0 · webhooks
Where you’ve seen this
We have already built this, at depth.
These are our own platforms. They exist because the problem kept recurring — and they are the most detailed engineering we can show you without a client’s permission.
Is this the thing that cannot go wrong?
Tell us what you are building and what it costs when it fails. You will speak to an engineer, and we will tell you honestly whether we are the right people for it.