A webhook is an HTTP callback that one system sends to another when a specific event occurs, such as a payment succeeding. The receiver learns about changes immediately instead of polling repeatedly.
An API (application programming interface) is a defined contract that lets one piece of software request data or actions from another. It hides internal details behind agreed operations, inputs and responses.
API security is the practice of protecting application programming interfaces from misuse. It controls who can call them, what data they can reach and how much they can request.
A backend developer builds the server-side systems that store data, apply business rules and serve applications through APIs. Hiring one is how a team secures correctness, security and room to grow in the layer users never see.
Event-driven architecture is a design approach in which services communicate by publishing and reacting to events. Each event records that something happened, so services no longer call each other directly and wait for answers.
Reverse ETL is syncing modelled data from a warehouse back into operational tools such as CRMs, support desks and ad platforms. Teams can then act on it where they work.
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