Middleware and Webhook Integration Between Your Systems
For two systems that need to react to each other's events without depending on the other's uptime, we build the middleware layer that listens for webhooks, transforms the data and queues delivery reliably.
What Middleware Does That a Direct Connection Cannot
Connecting System A directly to System B seems simplest until one of them changes its data format, goes down for maintenance, or sends more events than the other can handle at once. Middleware sits between them: it receives an event, holds it if the destination is not ready, reshapes it into the format the destination expects, and only then delivers it.
What a Webhook-Driven Flow Looks Like
Listening for Events
A webhook endpoint receives a notification the moment something happens in the source system, such as an order placed, a status changed or a form submitted.
Transforming the Payload
The raw event is converted into the field names, formats and structure the destination system expects, since the two rarely match by default.
Queuing and Retrying
If the destination is briefly unavailable, the event is held in a queue and retried, rather than being dropped.
Verifying and Securing
Incoming webhooks are checked against a signature or secret to confirm they genuinely came from the source, not from someone who found the endpoint.
Why This Layer Matters More Than It Looks
- It stops a spike of events from one system overwhelming a slower one downstream
- It means the two systems never need to know about each other's internal formats directly
- It gives you one place to look when something did not arrive, instead of two systems each claiming they sent it
Where This Is Typically Needed
- A vendor's webhook format changes without warning, and the receiving system was never built to tolerate that
- Several systems all need to react to the same event, which a direct one-to-one connection cannot support
- Events arrive in bursts that a destination system cannot process one at a time fast enough
Frequently asked questions
Is middleware the same as an API?
No. An API is a way to ask a system for data or tell it to do something. Middleware is the layer that sits between two systems, catching events from one and delivering them to the other in the right shape and at a pace the destination can handle.
What happens to an event if the destination system is down when it arrives?
It is held in a queue and retried on a schedule until it succeeds or reaches a defined limit, at which point it is flagged for review rather than lost.
Can middleware send the same event to more than one destination?
Yes. Because it decouples the source from any single destination, one event can be transformed and delivered to several systems that each need to know about it.
How do you make sure a webhook is genuine and not spoofed?
Through signature verification. The source system signs each webhook with a secret only it and the receiver know, and any payload that does not match the expected signature is rejected before it is processed.
What drives the cost of a middleware build?
How many event types and destinations are involved, how different the data formats are between source and destination, and how much retry, queuing and monitoring logic the flow needs.
What sets the timeline for a middleware build?
How well the source system's webhook documentation matches what it actually sends in practice, since most middleware timelines are shaped by discovering and handling the edge cases in real event data.
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