Backend C# and .NET Developer

You will build and maintain backend systems that support AI-related technical work. The role focuses on reliable services, APIs, database performance, production support, and clear technical documentation.

• Design, develop, and maintain backend services with C# and .NET.
• Build and integrate RESTful APIs and other server-side components.
• Design MySQL schemas and improve database query performance.
• Improve backend performance, scalability, maintainability, reliability, and security.
• Troubleshoot and resolve issues in production and staging environments.
• Write technical specifications and document backend architecture.
• Contribute to development standards and technical process improvements.

What It Pays and Takes

This is a remote, part-time contract role. You should be able to manage priorities independently, communicate clearly with distributed teams, solve problems proactively, and continue learning as the work develops.

• Pay: $60 to $110 per hour.
• Location: Remote contract role open to candidates in 52 countries, including the United States, Canada, United Kingdom, India, Japan, Brazil, South Africa, and Vietnam.
• Language: Professional fluency in English.
• Required: Expert-level C# and .NET skills.
• Required: Strong MySQL experience, including schema design and query optimization.
• Required: Knowledge of server-side logic, RESTful API development, and integration patterns.
• Required: A record of producing clean, maintainable, and well-documented code.
• Helpful: Experience deploying cloud-hosted applications with AWS, Azure, or GCP.
• Helpful: Familiarity with distributed teams and Agile methods.

How It Works

Apply on OpenTrain with your resume, then complete the application on the hiring site.

About AI Training Work

AI training work is the human work behind systems that learn from examples, including software code, written responses, images, audio, and other data. Experienced contributors can help improve how these systems work by applying practical skills such as software development, technical review, and quality checking.