On-Site SEO - Meta tags etc

Looking for the BEST SEO writer that can assist with on-site SEO only. Do not provide Off-site SEO pricing. I am an SEO expert myself but need some help in completing task on time. ( I will ask you SEO questions to determine your expertise) Have an e-commerce site (Spree) and looking for an expert that can optimize on-site SEO for about 1500 product pages. Mostly rewriting URLs, titles, product description, meta descriptions, H1s, etc. All content must be unique as I will check for plagiarism and also analyse meta tags to make sure it is 100% optimized. I will provide you with a list of keywords and you will research rest as you write. 14 days time frame to complete this task. site has over 15000 products so if you do a great job, I will happily extend this relationship. Question: where is the best place to put a keyword in the title? Left or right Which is more important between the meta title and the meta description ? Submit answer with your bid