Software engineering, visualized.
Every episode takes one concept and draws it: how it works underneath, where it breaks, and why the fix looks the way it does. Diagrams built up piece by piece until it clicks. No slides, and no reading documentation out loud.
Episodes
It works on my machine: the half of your application you never shipped
Your code did not change between your laptop and production. The machine did. The five layers under your application, and what a container actually freezes.
You added a second server, and your users started getting logged out
A load balancer is ten lines of configuration. The hard part is what it makes visible in your application: sessions, uploads, caches and connection pools.
Why a file is not enough, and what a database actually gives you
You saved two things and only one came back. The problems a file cannot solve, what a database does about each, and what it costs that there is only one of it.
Your query got slow and nothing about it changed
Same table, same index, one word different, and eighty milliseconds becomes nine seconds. Why the database stops using your index, and what an index really costs you.