# Worker interface In Juju, the **`worker` interface** is a Go interface in [the Go worker package](https://documentation.ubuntu.com/juju/4.0/contributor/reference/worker-package.md#worker-package) that defines the `Kill()` and `Wait()` methods implemented by any Juju [worker](https://documentation.ubuntu.com/juju/4.0/contributor/reference/worker.md#worker-cont). > See more: [Go packages | `worker` > `worker.go`](https://github.com/juju/worker/blob/HEAD/worker.go)