Miguel Ángel Del Fresno retweetledi

I have 12 years of experience and working as a Principal Engineer @Atlassian and I have seen concurrency scaring the hell out of a lot of junior engineers.
It’s one of the most feared topics in system design & backend interviews — race conditions, deadlocks, thread pools… you name it.
But once you internalize these 20 must-know concepts, everything clicks.
Save this thread. Read till the end.
Your future interviews and production systems will thank you.
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