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

- **Company:** Demandpdx, LLC
- **Location:** United States (Remote available)
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Application Programming Interfaces (APIs), Application Performance Management, C Sharp (Programming Language), Cloud Computing, Cloud Foundry, Code Review, Middleware, Mobile Application Software, Microsoft Software, Platform as a Service (PAAS), Systems Development Life Cycle, Shopify, Software Engineering, Data Streaming, Systems Integration, Backend, Graphql, Api Design
- **Published:** November 3, 2026
- **Apply:** https://www.careerbuilder.com/job-details/cnet-developer-shopify-middleware-focus--68e31b87-a34e-4d80-81b9-100d730939bd

## About the Role

Microsoft C# (C Sharp), Microsoft .NET, Software Engineering, Middleware, Scalable System Development, Middleware, Software Engineering, Microsoft .NET, Platform as a Service (PaaS), Mobile Applications, This role requires strong backend engineering skills, experience with APIs and integrations, and the ability to work independently in a fast-paced environment., * 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.

Remote Work

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

## Description

Do you enjoy building scalable backend systems that power seamless digital experiences? Do you thrive in integration-heavy environments where performance, data flow, and reliability matter? Do you like working behind the scenes to ensure platforms talk to each other efficiently and securely?, As a C# / .NET Developer, you will play a key role in expanding and supporting a client's middleware layer that integrates Shopify and other systems. You may also contribute to a mobile app backend running in a Platform-as-a-Service (PaaS) environment, as the existing provider transitions off the account., * 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.