"Recently, a tricky concurrency bug in our distributed data platform was escalated to me—one that had stumped the entire team for months due to gaps in understanding transaction isolation and concurrency issues (despite having CS degrees!).<p>Inspired by this experience, I wrote a simple, practical tutorial using a Django app as an example.<p>This is a new exercise for me since I’m often too busy to write public-facing content (seriously, how do people find the time for blog posts??), but I hope it helps others avoid the same headaches!"