Olaoluwa Osuntokun is listed on Lightning Labs' own team page as CTO and co-founder. Lightning Labs' 2018 Form D filing with the Securities and Exchange Commission names him as an executive officer, a director and a promoter of the company. He works publicly under the handle Roasbeef.
His work is on lnd, the Go implementation of the Lightning protocol that Lightning Labs
develops in the open under an MIT licence. The daemon conforms to the BOLT specifications,
which is what allows a channel opened by an lnd node to work with Core Lightning, Eclair
and any other conforming implementation, and that interoperability is a matter of
specification work done jointly rather than of any one codebase.
Only his stated public roles and published work are recorded here.