• 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.