Build, Buy, or Adopt

The marketplace's 45 teams turn new features on and off in many different ways. Some use configuration files, some use environment variables, and two teams have written small flag services of their own. The director of the platform group asks the Staff engineer for one feature flag system for the whole company. It must support gradual rollouts, targeting by seller segment, an audit log, and a switch that turns a feature off in seconds.

There are three ways to get it. The platform group can build it, or the company can buy a vendor's product