Spring GDS 25th Anniversary
A logistics company that ships to 190 countries built something to ship to itself.
Webhook
What is a webhook?
A webhook lets one system automatically notify another when a specific event happens, by sending an HTTP request to a URL the recipient set up in advance. A traditional API makes the client keep asking "has anything changed yet?", a pattern called polling. A webhook flips that around. The server reaches out the moment something happens. It's the difference between checking your mailbox every hour and having the carrier ring the doorbell when a package lands.
Under the hood a webhook is usually an HTTP POST request carrying a payload, sent from the source system to the recipient's endpoint, which reads it and does whatever the event calls for. They're the glue behind a lot of automation. A payment platform fires a webhook to a fulfilment system the instant a transaction clears, so the order ships without anyone refreshing a dashboard. A version control platform pings a CI/CD pipeline when new code is pushed. They're efficient and they scale well, but they put real demands on the receiver: the endpoint has to stay reachable, validate what comes in, cope with duplicate events, and handle deliveries that fail and get retried.
Treated carelessly they become a source of silent data loss. Treated properly they remove a whole class of polling and latency from a system.
Webhooks at Dallonses
Webhooks show up constantly in our API integration work, because most useful products need to react to events happening somewhere else. Payments, shipping, CRMs, version control. We wire these systems together so an event in one shows up in another within seconds, no manual sync, no nightly batch job.
The honest part of this work is everything that can go wrong. We build webhook receivers that verify signatures, ignore duplicates, and retry sensibly when the other side has a bad moment, so a missed delivery doesn't quietly lose a client's order. Our platform integration is judged on the days the third party misbehaves, and that's where we make sure it holds.
Got systems that need to talk to each other without manual glue? Let's connect them.
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