Micro-Frontend Architecture: How to Split a Monolith Without Losing Your Mind (opens in new tab)

I still remember the moment I knew our frontend had become a problem. It took 4 minutes to run our test suite. PRs sat in review for days because everyone was afraid of merge conflicts. Deploying a button color change required coordinating with three other teams. We had a 280,000-line React monolith, and it was slowly eating us alive. That was three years ago. Since then I've navigated two micro-frontend migrations, made some expensive mistakes, and developed strong opinions about what actual...