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Senior Software Engineer, Instrument Control

Quantum-Si
United Statesfull_timeVerifiedPosted 16 Oct 2025
💰 $160,000/yr($130,000/yr$160,000/yr)

About the role

We are looking for an experienced and ambitious instrument control software engineer to join our instrument software team. We’re developing a next-generation system built on a modern, tiered architecture using .NET C# on Linux. Hardware components are integrated through standard communication protocols and emphasize orchestration over low-level control. The system also includes capabilities for cloud connectivity, secure software updates, and performance monitoring. 

Note: While some responsibilities involve supporting our current product line, the primary focus is on delivering the new platform. 

 

As part of our team, your core responsibilities will be:  

  • Design, develop, and maintain services and libraries for a tiered instrument control architecture on Linux using .NET (C#), with an emphasis on reliability, safety, and clear separation of concerns. 
  • Build a modern UI for instrument operation, status, alerts, calibration, and service workflows; contribute reusable components and MVVM patterns. 
  • Integrate cloud connectivity for data transfer, configuration, logs, fleet health, and remote diagnostics. 
  • Capture and query metrics and logs to drive observability, performance tuning, and field reliability. 
  • Create hardware simulators, fakes, and automated integration tests to enable CI for device workflows without physical hardware. 
  • Improve operational excellence via health checks, watchdogs, software updates, safety interlocks, failuremode handling, and oninstrument diagnostics. 
  • Provide targeted sustaining support for the existing product line (triage, small fixes, backports) while prioritizing newplatform delivery. 
  • Document software designs, code, and processes for clarity and maintainability. 
  • Collaborate across engineering, data science, and image analysis teams to translate complex requirements into well-integrated solutions. 

 

Qualifications 

Baseline skills/experiences/attributes: 

  • Bachelor’s degree in Computer Science, Electrical Engineering or a related discipline. 
  • 5+ years of experience delivering production software in C#. 
  • Proficiency with Linux. 
  • Proven ability to design multithreaded systems, state machines, and robust error handling for real-world hardware. 
  • Strong testing discipline and practical debugging skills across process boundaries and I/O layers. 
  • Demonstrated ability to design scalable software architectures and produce clear, comprehensive technical documentation. 
  • Excellent collaboration and communication with cross functional engineering teams. 

 

Ideally, you also have these skills/experiences/attributes (but it’s ok if you don’t!): 

  • Experience with hardware communication and device integration (e.g., serial/RS-485, I2C, command-response patterns, timeouts/retries). 
  • Experience shipping desktop UIs (preferably Avalonia or similar MVVM frameworks) and instrument/operator workflows. 
  • CI/CD for multiprocess systems, containerization, and artifact management. 
  • Python scripting for automation and control logic. 
  • C++ experience to support the existing product line.

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Company

Quantum-Si

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