Now, look, I really don’t want to keep trying to force WT connections where there aren’t any, but…
Born 13 April 1985
He’s 41, a solo dev, and French.
Edit: Thanks to @toddumptious: The school code post is dated May 12, 2002 and is titled “When we were 17”. Arnaud would have just turned 17 the month before this date. I think we’ve just found our guy.