software development projects

I need you to develop some software for me. I would like this software to be developed using PHP. Hello team, I have an urgent requirement on integration of sms software (.php) to my existing advance stock management application (.php). The current software acts as stock manager as well as used as a point of sale application is a .php based software. In order to retain the existing customer and fetch any new customer we would like to integrate an SMS and email management software which can manage our contacts, create SMS/Email template, send SMS/Email, schedule SMS/Email, wish on contacts’ birthday/anniversaries etc. in a smarter way. Please note that our budget is quite low (max 2-3k) and only serious developer should contact in case they are okay with the amount of work and low cost budget. Thanks for your understanding.