Create a Joomla Template / Extensions

Dear potential co-worker, I am looking for a reliable freelancer with strong skills in Joomla CMS.I have already developed website based on Joomla CMS. New functions such as graphs, mapping and calculation functions are needed to the front end side of the website. I would love to assign this project to the freelancer who have a real interest in Joomla abd few years of experience under his/her belt. Good knowledge of programing languages such as javascript, python... may be needed I am looking forward to receive your offers. FYI: after initial contact more details about the project will be provided to you Niklas