Jobs fixes

This adds a new Interactive Developer job and removes the JS Engineer role, but also fixes a few bugs, namely the devblog vanishing due to CAPI v2 switch, and system JS being updated (at least, when I ran it locally) and all the file references failing.
Yeah, I couldn't think of an alternative besides making the call at build time and caching the result, but then this very repo is public so now it's out in the wild... I guess we just hope CAPI keep an eye on that key...