Convert existing site to responsive design

You will apply responsive web design techniques to an existing site, [login to view URL], to improve its presentation and usability on a range of devices. [login to view URL] has been around for 10 years, but somehow I've never had the time to optimize it for mobile, so this is where you come in. Most pages need a pretty thorough overhaul for mobile, but areas of focus are the log in process, the site header, browsing the database, using forums, the collection interface, product and part details pages, the profile page, and modifying parts and product records. I will provide more information on this soon, including links and screenshots. Hopefully much of this can be done through CSS, but you may also need to touch some of the javascript, or do heavy surgery on PHP templates, so make sure you are comfortable with both. [login to view URL] is behind the times when it comes to mobile, but otherwise is fairly modern, so you will need to know about: * PHP (for templates) * Typescript (all [login to view URL] javascript is written in Typescript) * Grunt (for transpiling typescript, building site assets) * SASS (for compiling CSS) I will provide code repository access to the winning bidder, and a vagrant VM configuration to get you up and running quickly. You will do your work as a normal developer would, periodically opening pull requests for me to review and merge. I expect this to be quite a lot of work; likely a month or more of full time work for an experienced developer. Please don't bid unless you have experience in this kind of work! And please, no high school kids or bidders under 20 years old. Thanks much!