It's your official title, so if you have a boss, you should ask them. If you can decide your official title yourself, please read on.
may seem long, but it cannot be shortened. is a fairly new concept, and it cannot be written in kanji. would sound much nicer than something like .
is already short enough. and have similar meanings, but they're not shorter. You can use or if you really like, but IMHO the katakana-only expression would look nicer. (Just to be sure, there can be only one ///, but there can be many 's in your team.)