Engflow has some very smart people. There are also a number of other open source alternatives such as Buildbarn (https://github.com/buildbarn https://github.c

Engflow has some very smart people. There are also a number of other open source alternatives such as Buildbarn (https://github.com/buildbarn https://github.com/buildbarn) and Buildfarm (https://github.com/bazelbuild/bazel-buildfarm https://github.com/bazelbuild/bazel-buildfarm) which you can host yourself. Personally, I've found Buildbarn great to throw up in Kubernetes and build massive projects with.