BackendGeneralHigh signal
Race Condition
Also written as Concurrency Bug, Data Race
A bug where the outcome depends on the timing of two things happening at once — the kind that passes every test and fails in production under load.
Think of it like
Two people editing the same paper form at the same time: whichever hands it in last silently wins.
Junior or senior?
A genuine seniority signal, because you mostly learn this from having been burned.
Senior sounds like
Can describe one they diagnosed, which is famously hard.
Ask them
“Tell me about a race condition you tracked down. How did you finally reproduce it?”