I am looking for designer for my application.

hi, freelancers. i just think to build my application. i have old my web app but its design is very old and looks like unprofessional.
i want fresh design for my application, i will start with arround 4pages, but it is very simple design.
if you give me full result, i will keep the work with you.
please bid if you are very familiar with figma or xd....
Thank you in advance.