Absolutely. My current role involves literally chasing down all these integration point issues - and they keep changing! Not everything has the luxury of being built on a stable, well tested base.

I'm having the most fun I've had in ages. It's like being Sherlock Holmes, and construction worker all at once.

Print statements, debuggers, memory analyzers, power meters, tracers, tcpump - everything has a place, and the problem space helps dictate what and when.