Swedish doesn't really have the voiced ʒ sound as in French (e.g. joue), so most people use the typical Swedish ɧ sound ("the sj-sound"). Some people use a ʃ sound (e.g. like in chou). But it varies quite a bit among different speakers, so it really doesn't matter much which one of these three you pick. What's important is that the G in ingenjör can't be prounounced as a Swedish G or J sound.