Dear Sir,
Thanks for taking the time to read our bid description. We have our Head Office in CA, USA but our development office is in Lahore, Pakistan (GMT + 5 hours), however, you won't have any communication problem as we have many customers around the globe and in USA, we can even provide you references of our past customers.
Please see PMB for our work and we need more detailed requirements to come up with our firm estimate in terms of time and cost or If you can spare some times for online technical meeting, that would be great.
Thanks,
LEADconcept