Hello,
Thanks for posting your business with us and i have seen your requirement for salesforce developer, I have an team with Full stack Salesforce developer's and also tester's experienced more than 4 years and for developer 8+Years experienced.
We have done 15 projects and also giving service for clients for short periods and also long period according to their requirement and the delivery time will be more accurate that what we will promise you before taking project's, I believe will help achieve the bussiness goals mentioned here.
Please review my proposal and let me know your thought's.
Thanks