Principal C# Backend Engineer

About Goods & Services
  
Goods & Services is a product design and engineering company. 

We solve mission-critical challenges for some of the world’s largest enterprises, with deep expertise in highly regulated industries—includinglife sciences andfinancial services. Ourdesign-led approach allows us to apply cutting-edge capabilities inAI,DataandHardware Engineering to companies of any size. 

Headquartered in theUnited States, we operate regional development centers inMexicoand theUnited Kingdom. This global footprint—anchored by ournearshoremodel—enables us to deliver at scale with the speed, efficiency, and cultural alignment our clients expect.

About the job
  
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.

What you’ll do:

• 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.

What you’ll need:

• 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.

Nice to have:

• 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