Principal C# Backend Engineer

Role Description

Goods & Services is looking for a Principal C# Backend Engineer with expertise in workflow orchestration, state management, and backend service design. Experienced in modernizing legacy systems, building reliable analyzer integrations, and delivering scalable, event-driven solutions.

Location: Loveland, Colorado.

• Develop and maintain analyzer workflow logic within the ECL platform, owning the backend processes that drive analyzer operations end-to-end.
• Implement and extend workflow orchestration — managing analyzer state transitions, operational sequencing, and runtime event handling.
• Collaborate with the Analyzer Integration Engineer on the communication layer between ECL and connected analyzers.
• Support the DCU modernization effort by identifying workflow logic that can be extracted and repackaged into shared .NET libraries.
• Work with QA to ensure workflow correctness and reliability across analyzer types and edge cases.
• Participate in knowledge transfer from departing Hydra resources to preserve continuity of analyzer workflow behavior.

Qualifications

• 7+ years of professional C# / .NET backend development experience.
• Experience building workflow or orchestration systems — state machines, process sequencing, or similar patterns.
• Solid understanding of backend service design and inter-service communication.
• Ability to work within and around legacy codebases without breaking production.
• Collaborative approach to working alongside integration and infrastructure engineers.

Requirements

• Exposure to medical device, laboratory, or instrument integration workflows.
• Familiarity with .NET Framework 4.x and modern .NET migration patterns.
• Experience with Azure Service Bus or event-driven messaging.
• Background picking up ownership of an inherited or underdocumented system.