Building a versioned UI deploy system for fast, stable deploys and rollbacks

At Blend, we’re working to bring simplicity and transparency to consumer lending. In the last two years, the Blend engineering team has doubled from 50 engineers to more than 100. Unsurprisingly, our codebase has grown in size and complexity as well. As the team has grown, we’ve embraced the principle of distributed ownership. On the UI team, this means owning our own technical health, and, as of a few months ago, our own release.