unfortunately, my search for "nexo pos" didn't return anything expected except for a restaurant extension.
but if I'm guessing right, you are looking for a restaurant theme with a back end that manages orders.
if so, i believe i have the skills and experience to handle the project. i uave experience in both front-end and back-end web technologies including PHP, SQL, JavaScript etc.
i hope you will be excited to work with me as i am in working with you.