Start9's news page describes Aiden McClelland as "Co-Founder & Lead Developer" of Start9 Labs in the entries covering his podcast and interview appearances.
The software he leads is StartOS, which the company publishes as open source and describes by analogy: "Just as Windows and macOS made it possible for anyone to own a personal computer, StartOS makes it possible for anyone to own a personal server." It handles discovering, installing and running self-hosted services on a machine at home, with Bitcoin and Lightning documented as a category in their own right.
Development happens in public at github.com/Start9Labs/start-os. This entry records the role he has publicly taken and the code he works on, and nothing else.