CodeFlow: Improving the Code Review Process at Microsoft (2018)
What y'all really want is Google Critique. You just don't know it yet, because you haven't experienced it, as it's internal to Google. The closest public product that I could find is http://reviewable.io (no affiliation) which, while it looks weird/amateurish, nails most of the points which make Critique so amazing. There's also Gerritt, but it's too invasive in terms of workflow, whereas Reviewable integrates with GitHub in a more lightweight fashion.