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People often talk about AI, ML, the Internet, and Cloud technology but underneath of this things there are multiple hardware devices that are still as relevant as this technologies. And because of these hardware devices the data often fly to one plac...

Why do some bugs only appear after deployment, even when tests pass locally? Early in my backend work, I kept hearing discussions around stateful vs stateless. It felt academic at first, but once I started dealing with scaling issues, flaky tests, an...

A stateful firewall tracks the state of connections. When it allows traffic in one direction, it automatically allows the return traffic. It remembers the entire session. AWS Security Groups are stateful. They only use allow rules, and they do not ne...
