TL;DR

AWS hit a massive outage on October 19, 2025 that lasted over a day—10 days later, the official RCA revealed a chain reaction: Dynamo’s DNS entries vanished, then EC2 hiccups and Network Load Balancer errors piled on. Hussein Nasser’s breakdown walks you through timestamps for the summary, Dynamo DNS loss, EC2 errors and NLB issues.

Beyond the postmortem, he drops links to all his backend chops: OS fundamentals, Node.js internals, backend troubleshooting, networking, databases, NGINX, Python, plus his Medium, YouTube membership, podcast and more.

Watch on YouTube