As of now, my client is very much interested in working with someone who has experience working with Sketch. Creating rough wireframe drafts wouldbe sufficient for this task. Should you be interested in this work, you'll be working with another designer who is currently in the project already.
Also, would be great to have someone who speaks English well.
Please let me know if this is something that interests you, or something you can do and I will relay your contact information to my client so that
he can better correspond with you.