UX/UI Designer to create medium-fi wireframes from sketches

We are looking for a designer to convert the various mobile flows from the paper sketches to medium-fidelity wireframes (you may also be asked to make web version)

This will be on an ad hoc basis over the next couple of weeks.

We would like the wireframes done in Sketch, the nature of the product is around e-vouchers.

We would need someone with a quick turnaround.

We can get started as soon as possible

We will be paying on an hourly to day rate basis. We will have much more work moin the foreseeable future so if this goes well we'd like to have an on-going freelance relationship.