Senior Instrument Control Software Engineer – Real-Time Systems

Quantum-Si; Branford (CT); On-site; USD 155,000 - 175,000; Full time

Benefits offered by this job

Medical insurance

HSA/FSA options

Life insurance

Disability insurance

EAP resources

Paid time off

Parental leave

401(k) retirement plan

Job summary

Quantum-Si in Branford, CT is seeking an experienced instrument control software engineer to join the instrument software team. You will work across the full stack—from low-level hardware integration and instrument automation to distributed services and user-facing applications—helping shape architecture for next-generation scientific instruments.

This role focuses on designing, developing, and maintaining high-performance software, collaborating across engineering teams, and driving

Qualifications

• Bachelor’s degree in CS, EE, or related field or equivalent.
• 5+ years of professional software development experience, with C# focus.
• Experience with .NET 6+ for cross-platform apps.
• Familiarity with Linux (Ubuntu preferred).
• Proficiency with Git and Agile/Scrum workflows.
• Experience with automated testing and CI/CD pipelines.
• Experience with multi-threaded programming and real-time data acquisition.
• Experience with RPC frameworks (gRPC) for inter-process and inter-service communication.
• Proven track record in software architecture improvement and debt reduction.
• Strong documentation skills.
• Experience debugging, profiling, and optimizing software.

Responsibilities

• Design, develop, and maintain software for the instrument, ensuring high performance and reliability.
• Develop and integrate data acquisition, motion control, signal processing, data analysis, automated workflows, and user interfaces for a complex scientific instrument.
• Collaborate with systems integration and engineering teams to define and implement new instrument functionality.
• Refactor and improve existing software architecture to enhance maintainability and reduce technical debt.
• Document software designs, code, and processes to ensure clarity and maintainability.
• Troubleshoot and debug software issues, providing timely resolutions.

Skills

C#

.NET 6+

Linux

Git

CI/CD

Multi-threading

RPC frameworks

Software architecture

Debugging & profiling

Documentation

Education

Bachelor’s degree

Tools

Avalonia

Python scripting

Job description

Quantum-Si in Branford, CT is seeking an experienced instrument control software engineer to join the instrument software team. You will work across the full stack—from low-level hardware integration and instrument automation to distributed services and user-facing applications—helping shape architecture for next-generation scientific instruments.

This role focuses on designing, developing, and maintaining high-performance software, collaborating across engineering teams, and driving