Build a Website

I wish to build a website which allows the user to control a device in real time with 5 on off switches . The user will be able to view the device they are controlling via 3 web cameras. It will involve building both an attractive website with ecommerce credit card capability and an interface between the website and the machine it controls (to link the webcams and the 5 controls). Because there will need to be onsite testing and setup the applicant will need to be based in Auckland New Zealand. The applicant will be required to sign a confidentiality agreement before undertaking any work .