I need a SEO for my online sale(amazon & shopify)

The candidate should be a SEO expert in order to manage all tasks regarding advertisement for my Amazon products, advertisement campaign on Amazon, Adword google, sale through shopify(need my website on shopify to be organized), link building, and advertisement on Facebook. First 2 week will be a probation period, if the result satisfactory, the candidate will perform the job based on monthly salary($300/monthly)
The job required minimum 30/hours per week.