Forward-Thinking Continuous Integration and Delivery Pipeline

Building the technology powering the best consumer email inbox in the world is no easy task. When you start on such a journey, it is important to consider how to deliver such an experience to the users. After all, any consumer feature we build can only make a difference after it is delivered to everyone via the tech pipeline.

As we began building out the new version of Yahoo Mail, we wanted to ensure that our internal developer productivity would not be hindered by how our pipelines work. Keeping this in mind, we identified the following principles as most important while designing the delivery pipeline for the new Yahoo Mail experience:

* Product updates are pushed at regular intervals
* Releases are stable
* Builds are not blocked by irrational test failures
* Developers are notified of code pushes
* Hotfixes
* Rollbacks
* Heartbeat pushes