Shopify website developer familiar with Python and SQL

I need a Shopify website developed. I currently have a website that we will be retiring that has equipment and parts on it. We will be transitioning to Shopify because we would like to sell more of our supplies and the current website does not do this well. We also have a wholesale ordering site that is just for our local customers to place orders for their supplies. We would like Shopify to use the database of descriptions, pictures and pricing that this wholesale site uses. Ideally, I would like to find someone who can also take over future maintenance needs for both sites. The wholesale order site is integrating with our custom POS software. The programming for that site uses a mix of Python and SQL. The database is for our POS is Firebird. My friend that helped develop the wholesale site is a great programmer but is retired and does not want to be overly involved with maintenance and upgrades moving forward. I'm looking for someone that can take over once he is finished. I also have some follow-up projects for improving efficiency at the store by accessing the database for displaying stats or progress reports etc.