Senior Software Developer

We are looking for an experienced Senior Software Developer to help create and enhance the core applications that support both business operations and customer-facing products in St. Paul. This position focuses on building dependable backend solutions, improving system performance, and partnering with technical teams to deliver well-designed software. The ideal candidate brings strong expertise in C# and .NET technologies, along with a practical approach to API development, integration work, and modern engineering practices., * Create and support backend applications and services in C# and .NET with an emphasis on stability, scalability, and maintainability.

• Develop and refine REST-based interfaces, ensuring clear API design and accurate documentation through OpenAPI and Swagger standards.

• Use AI-enabled development tools to streamline coding, testing, and delivery while maintaining high quality standards.

• Improve application efficiency by identifying opportunities to strengthen performance, resilience, and overall system responsiveness.

• Connect software platforms with internal business systems and third-party technologies to enable reliable data exchange and functionality.

• Participate in technical design discussions and help advance architecture, modernization efforts, and engineering best practices across the environment.

• Investigate complex production problems, determine root causes, and implement effective long-term solutions.

• Contribute to development work involving containerized services, relational databases, source control workflows, and frontend collaboration with React

Requirements * At least 7 years of software development experience with a strong focus on backend engineering.

• Advanced proficiency in C#, .NET, ASP.NET, and related Microsoft development frameworks.

• Hands-on experience building RESTful APIs and documenting services with OpenAPI or Swagger.

• Solid knowledge of relational database development, including PostgreSQL, MySQL, and SQL-based data modeling.

• Familiarity with containerized application environments and modern source control practices using GitHub.

• Experience working with JavaScript and React in support of full-stack or cross-functional development efforts.

• Demonstrated ability to troubleshoot complex application issues and collaborate effectively with internal stakeholders and external partners. Technology Doesn't Change the World, People Do.®, All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information.

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