Full Stack Web Developer (Front & Back End) with Knowledge in BigCommerce

We are looking for a web developer / web programmer who is an expert in both Front and Back end side. Several sites need a design change / worked on consistently for maintenance. Knowledge of BigCommerce is needed as the e-commerce site is under that platform. Knowledge of SEO is a plus, in driving traffic to the website. We need to convert it from a blueprint to a stencil theme working in a sandbox environment.