Senior C# Developer Desktop for E-commerce Applications
Budget: $250 – $750 USD
Desktop Developer (Remote)
We’re looking for an experienced C#/.NET Developer to support us on a freelance basis for a powerful desktop integration project in the e-commerce and ERP space.
? Project Scope & Responsibilities
✅ Develop and maintain a scalable, modular C#/.NET desktop application
✅ Design and integrate RESTful APIs with third-party platforms (e.g. marketplaces, ERP systems)
✅ Implement secure authentication (OAuth 2.0), error handling, and data synchronization
✅ Build a flexible licensing system to manage feature access
✅ Optimize performance, reliability, and maintainability
✅ Work with SQL Server, PostgreSQL, or similar relational databases
✅ Create clear technical documentation for future enhancements
? Required Skills & Experience
? 5+ years of professional experience in C#/.NET desktop development
? Strong experience with RESTful APIs and OAuth 2.0 authentication
? Solid knowledge of SQL Server, PostgreSQL, or similar databases
? Ability to build modular software architecture and licensing logic
? Excellent debugging, testing, and performance tuning skills
? Comfortable working independently in a remote, freelance environment
? Nice to Have
✔ Experience with e-commerce or marketplace APIs (e.g., Amazon, eBay, Kaufland)
✔ Familiarity with ERP systems or data sync mechanisms
✔ Knowledge of CI/CD, Docker, or cloud deployment tools
? Project Details
? Start: Flexible / ASAP
? Duration: Several weeks to a few months (with potential for follow-up work)
? Location: 100% Remote
? Compensation: fixed project fee
We’re looking for an experienced C#/.NET Developer to support us on a freelance basis for a powerful desktop integration project in the e-commerce and ERP space.
? Project Scope & Responsibilities
✅ Develop and maintain a scalable, modular C#/.NET desktop application
✅ Design and integrate RESTful APIs with third-party platforms (e.g. marketplaces, ERP systems)
✅ Implement secure authentication (OAuth 2.0), error handling, and data synchronization
✅ Build a flexible licensing system to manage feature access
✅ Optimize performance, reliability, and maintainability
✅ Work with SQL Server, PostgreSQL, or similar relational databases
✅ Create clear technical documentation for future enhancements
? Required Skills & Experience
? 5+ years of professional experience in C#/.NET desktop development
? Strong experience with RESTful APIs and OAuth 2.0 authentication
? Solid knowledge of SQL Server, PostgreSQL, or similar databases
? Ability to build modular software architecture and licensing logic
? Excellent debugging, testing, and performance tuning skills
? Comfortable working independently in a remote, freelance environment
? Nice to Have
✔ Experience with e-commerce or marketplace APIs (e.g., Amazon, eBay, Kaufland)
✔ Familiarity with ERP systems or data sync mechanisms
✔ Knowledge of CI/CD, Docker, or cloud deployment tools
? Project Details
? Start: Flexible / ASAP
? Duration: Several weeks to a few months (with potential for follow-up work)
? Location: 100% Remote
? Compensation: fixed project fee