Yes after go through your job description i'm pretty much confident that i can configure your extension as per your requirements .
I am a Senior web developer with lot of experience in Magneto website , extension development , payment gateways expert , theme/plugin customization expert and bug fixing and troubleshooting in many websites.
Please have a look at my profile::- https://www.freelancer.com/u/udhamupwork.html
I speak fluent English with quality communication through Skype/Mobile and flexible to work in all timezone.
Kindly drop me a massage, So we can discuss further. I can provide you constant availability of work in tight deadline.
So looking forward to hear from you soon.
Thanks.