It is difficult to predict NSA actions, but opportunistically putting up inexpensive surveillance on all Tor users and nodes seems like a reasonable thing to do. As a developer she is a Tor user and also probably operates a few Tor nodes [for debugging and testing purposes]. So she would be in that group. I think this is plausible. I doubt that NSA would specifically target a Tor developer in US, without court order, as this would probably be illegal. [Although subverting some Tor developers, especially ones who build Tor binaries would be useful.]