The middleware behind an agency's enterprise HubSpot rollouts.

Our partner is a certified HubSpot Enterprise agency working with large commercial operations: international rollouts, several business units, complex sales processes. They are very good at HubSpot. The problem was never HubSpot. It was the other system in the room, the sector-specific platform that runs the client's actual operation, has an API written a decade ago, and has no connector anyone can buy. Every one of those projects reached a week where the whole rollout depended on somebody writing middleware, and building an in-house engineering team to do it would have changed what kind of company they are.

We took the integration scope, and only the integration scope. The partner keeps the client relationship, the HubSpot architecture and the credit. Mutual NDA and a written no-solicit go in before we hear a client name. Their name goes on the documentation. On calls we are either their integration team or we are not on the call at all, and that is their choice per project, not ours.

The work is queue-based middleware rather than direct point-to-point calls, because the systems on the other side go down and the clients are in regulated sectors where losing a record is not an option. Webhooks land in a queue, every message carries an idempotency key so a provider replaying an event changes nothing, failures retry with backoff and anything unrecoverable parks in a dead-letter queue with the payload intact. Alongside the connectors we have handled e-signature flows, a HubSpot to Salesforce migration where a duplicated composite key was silently breaking deals, and the field-level mapping documents that let them support the result without calling us.

They quote integration scope without hesitating and without hiring for it. The engineering sits behind their brand, the documentation stays readable by their team, and the work runs on EU infrastructure to match the compliance posture their clients already expect. It is the clearest example on this site of what the partner track actually looks like in practice.