Shopify Developer Needed — Add Payment & Shipping Options to Existing Store

I have an existing Shopify store that's live and functional. I need an experienced Shopify developer to add new payment and shipping options to improve checkout flexibility for customers. Scope of work:... (Budget: $250 - $750 USD, Jobs: Customer Support, Documentation, HTML, Payment Gateway Integration, Payment Processing, PHP, Shopify, Shopify Development, Web Development, Website Design)