We need digital illustrators (or suitabe 3D artists) for creating slot game-graphic components.
Designer can decide the game theme. Related to the theme, game needs objects, characters, animals or even abstract drawings. Slot game also needs a background (related to theme) and UI elements.
For better understanding, (netent.com/games) these games can give you an idea what is needed.
Designers can work for multiple games if they desire. (5-10 or even more)
We prefer designers with suitable styled portfolios to work with.