Slicing to create a responsive website using Bootstrap framework

We have developed a website mockup using Photoshop. The Designer, and Product Manager have put in a lot of time, effort and thought into designing these high quality PSD files. This project needs to be sliced to create a responsive website using Bootstrap framework that MUST WORK across all browsers (Chrome, IE older versions, Firefox, Safari etc.), platforms and devices (Android/iOS). Broadly speaking the website has 6 distinct layouts across the entire website and some additional 6 pages and 10 popups/overlays reusing these layouts. We REQUIRE top notch high quality work: both in terms of the end product, and with respect to the underlying code - even variable names, selector names etc. need to be sensibly picked and used. (I am a designer / web developer myself!) The website is going to be integrated with a backend system by engineers using AJAX etc to create a web based service application. If you have engineering talent, we could potentially discuss that too but this bid is ONLY FOR SLICING and creating a STATIC version of the website. Serious bidders only. We want to have a long term association with the person working on this as there will be LOTS more work coming in the future. (Signing NDA will be required, please be willing to sign, and even more so please be willing to RESPECT and HONOR it). We will not compromise on quality.