When choosing a Shopify development company, there are several factors to consider. Here are some key considerations:

1. Experience: Look for a company with a proven track record of delivering high-quality Shopify stores. Check their portfolio to see examples of their previous work.

2. Expertise: Shopify development requires a specific set of skills, so it's important to choose a company that has expertise in this area. Look for a company that specializes in Shopify development and has experience working with the platform's features and integrations.

3. Communication: Communication is key to a successful project. Look for a company that is responsive and communicates clearly throughout the development process.

4. Support: After your Shopify store is launched, you'll likely need ongoing support and maintenance. Make sure the company you choose offers reliable support services.

5. Pricing: Of course, pricing is an important consideration. Compare prices among different companies and look for one that offers a reasonable price for the services they provide.

As for Digital Radium, they are a Shopify development company based in St. Louis. They specialize in creating custom Shopify stores for businesses of all sizes. They have a team of experienced developers who are skilled in all aspects of Shopify development, from design to development to support. With a focus on communication and customer service, Digital Radium has built a reputation as one of the best Shopify development companies in St. Louis.