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.
Having the key public is not a big issue as anyone could create a new one so there is no incentive to copy-paste someone else key. There is a standard rate limit on this key.