Databases that are slow, fragile, or nobody fully understands anymore - that's what I deal with.

I work across the boundary between databases, infrastructure, and applications, because that's usually where the actual problem hides. I show up when things are critical, when performance has tanked, or when the system's grown past what anyone can hold in their head.

No guessing games - dig until you find the real cause, then fix it properly instead of patching the symptom.