Build engineering
Nix: https://christine.website/blog/drone-kubernetes-cd-2020-07-10
Dropbox: Athena, build health monitoring
Flaky tests
Tests quarantine
Test only changed code
https://engineering.shopify.com/blogs/engineering/spark-joy-by-running-fewer-tests
Predictive Test Selection
https://arxiv.org/pdf/1810.05286.pdf