Hello,
I have read your job description you want a Buyer & Seller Chat Application .
We can build for your please let me know few things regrading the project.
How many screen will be in your phone application.
Do you want any perches
Do you want native or hybrid app
.
What is targeted plateform like social site, Ecommarace etc.
We have a team who are working in web development and mobile development more than the 7 years.
Please drop me a massage for further discussion.
Regards,
SoftSketch