You probably fit the "principle engineer" or "technical lead" titles better. But it's hard, because no doubt in many companies these titles have been corrupted

You probably fit the "principle engineer" or "technical lead" titles better. But it's hard, because no doubt in many companies these titles have been corrupted* to mean something else. End of the day, if you're happy and delivering value your title doesn't really matter. But it might when you want to move role in the future, so you might want to keep one eye on what the market is branding you as. Fow what it's worth, I'm glad you're happy with your role. :) *or maybe just changed, who am I to decide what words mean