Oh I didn't notice that Mel put out the Q&A video about her new game.
https://www.youtube.com/watch?v=d8yL-_CQyTg Never heard of the other devs but in order of this screenshot they go by Doople who's writing, Krisu the character artist, Puregem the audio lead / composer, Mel herself, Shallteir who's directing, and Helltaker who's the project lead.