I am a contractor working for several clients but Ubisoft is my largest client since over 5 years now. Among others I have also consulted for:
Supercell, Wooga, Cipsoft, Digital Extremes, Edge of Reality, Play Raven, Remedy, Bigpoint, and Unity.
all in my special field as f2p expert and online games.
I am also teaching at various Universities and offering courses and workshops in f2p monetization & online games.
Due to my loyalty to my clients I am usually not accepting work for games which are similar or in competition on projects I have consulted for, so if you want to hire me you might need to ask first if your game fits that limitation.