C# / .NET Developer (Shopify / Middleware Focus)

DemandPDX is a Salesforce Crest (Gold) Partner and Shopify Plus Partner, recognized with the highest ratings for Salesforce Commerce Cloud on Salesforce AppExchange. With more than 450 eCommerce implementations delivered by our team, we bring deep expertise across architecture, development, strategy, QA, and project leadership.

Our entire team is U.S.-based, and we pride ourselves on delivering high-end strategic guidance while integrating seamlessly as an extension of our clients’ teams.

• →Design, develop, and maintain middleware applications using C# and .NET.
• →Build and maintain integrations between Shopify and external systems.
• →Use GraphQL to query and manipulate data from Shopify APIs.
• →Enhance and support existing middleware services currently in production.
• →Collaborate with cross-functional teams to define, design, and implement scalable solutions.
• →Support and potentially transition ownership of a mobile app backend (PaaS-based).
• →Optimize application performance, scalability, and reliability.
• →Troubleshoot and resolve complex backend and integration issues.
• →Write clean, maintainable, and well-documented code.
• →Participate in code reviews and follow engineering best practices.

• Experience: Minimum of 4–5 years of hands-on experience with C# and .NET development.
• Backend Development: Strong experience building APIs, services, and middleware architectures.
• Shopify (Preferred): Experience working with Shopify APIs. Direct Shopify development experience is ideal.
• GraphQL: Solid experience using GraphQL to query and manipulate data (Shopify GraphQL Admin API experience is a plus).
• Cloud / PaaS: Experience working in cloud-based or PaaS environments.
• Integration Experience: Proven experience integrating third-party systems and APIs.
• Problem-Solving: Strong analytical and troubleshooting skills with the ability to resolve complex backend issues.
• Communication: Strong written and verbal communication skills. Ability to work effectively with client stakeholders and distributed teams.
• Collaboration: Experience working in an agile development environment.

• This position qualifies for remote work anywhere in the United States.