Tell an interesting case at work.

Once on a Go project, we faced a problem where, under high load, the application unexpectedly started crashing due to a memory leak. After thorough analysis using the pprof profiler, it was found that goroutines were not closing because of improper use of channels and contexts. We rewrote part of the code, adding proper context management and channel closing, which not only eliminated the leak but also increased the stability of the service. This case demonstrated how important it is to work carefully with concurrency in Go and to use profiling tools for diagnostics.