Google spreadsheet script / Google spreadsheet API expert programmer needed (Long Term jobs)

We are an E Commerce company that have specialized business sites ranging from online stores, electronic recycling sites, B2B marketplace sites, etc. Recently we need someone who experienced making a bot, especially who experience with Twitter/Twitterfeed environment Job Description: Create a script/API for google spreadsheet according our needs. Recent need is to create RSS feed from google spreadsheet. Please note, this is only one of many other google spreadsheet tasks that we have. So we need a very expert programmer in google apps script as there will be many other tasks if this small task is done. Job requirements: 1. Expert in Javascript/Jquery (as google apps script based on javascript) 2. Expert in Google apps/API environment More detail on the "Create RSS feed from google spreadsheet" : Google spreadsheet only can publish spreadsheet with limited info. Most of RSS feeds third party software (such as twitterfeed/ifttt/hootsuite) cannot recognize well the RSS feed, as it doesn't contains exact info of GUID/pubdate/etc. We have tried use yahoo pipes to modify this, but the pipes seems unreliable. Therefore, I'm looking for a way to display it directly from google spreadsheet. Anyone interested, answer this question : 1. Give me all your past experience creating google apps, especially the ones that related to google spreadsheet ? 2. How long do you think you need to create this ? 3. How you will charge me and at what rate ? Anyone that applying the job without answering the question will not responded.