Prestashop Website management and updating

I need an experienced and creative provider to manage my prestashop website. I need someone who has a strong experience of the Prestashop platform to take care of the following: 1] Keeping the website up-to-date and carry out routine website testing, 2] Installing/ optimizing modules as per my request, 3] Prepare the website's newsletters* 4] Optimize website security 5] Optimize the website layout 6] do SEO Successful candidate will be offered a full time position to manage the website on a pay per workload basis. * For item 3, I would like provider to prepare me an introductory newsletter to send to prospective customers. Provider should have creative writing skills. Happy Bidding!