wordpress sites build up and maintain

hello i need a person good experimence, reliable and long cooperate on my wordpress base sites, forums, ecommerce and more, he need to do some functionally work base on wordpress plugins or by code(need to be reviewed), optimize on the performance & secure work on ecommerce pay, i am IT engineer too, and fully understand your hardwork with respect, but for global cooperate, we need to build trust to save time on switch different person, so how to build our trust and what's a long term cooperation you suggestion???? you can offer me for pay, thanks. and please give me your introduce and my sky: business-99 this is truelly requirements, and sincerely ask for a good cooperate, and the payment would prefer monthy base, but accept project base at first too, anyway let's try to build our trust first. thanks.