Senior Embedded Software Engineer (QSS)

Infleqtion; Louisville (CO); On-site; USD 131,000 - 231,000; Full time

Benefits offered by this job

Medical, dental, vision – 100% company

Unlimited PTO

401(k) match

Equity program

Life and AD&D Insurance

HSAs/FSA

Job summary

Infleqtion is seeking a Software Engineer with deep expertise in Rust and embedded systems to join our cross-functional engineering team in Louisville, CO. You will work across the stack—from low-level embedded Rust and gateware integration to higher-level Rust interfaces, collaborating with hardware, firmware, and application teams.

The role emphasizes writing reliable, well-tested code, developing system-level APIs, and occasionally contributing to frontend tooling.

Qualifications

• Bachelor’s degree in computer science, Electrical or Computer Engineering, or related technical discipline, or equivalent practical experience.
• Minimum 5 years of industry experience in Rust development.
• Exposure to embedded software development using Rust and/or C++.
• Experience with gateware development and hardware/software integration (FPGA-based systems).

Responsibilities

• Collaborate with hardware engineers, physicists, and software developers to deliver integrated product solutions.
• Maintain documentation of designs, workflows, and processes per internal/regulatory standards.
• Contribute to integrating Rust-based middleware and driver software used for device control.
• Collaborate with hardware and FPGA teams to develop software drivers and interfaces for embedded devices.
• Develop and maintain system-level APIs and communication layers.
• Contribute to frontend development to support tooling, visualization, or user interfaces.
• Write clean, well-tested, well-documented code.
• Participate in code reviews and technical design discussions.

Skills

Rust Development

Embedded Systems

Frontend Development

Linux

Gateware/FPGA integration

C++ (exposure)

Education

Bachelors in CS/EE or related

Tools

FPGA

SPI/I2C/UART

Job description

Infleqtion is on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. As a deep-tech startup, we embrace a results-driven, fast-paced, and customer-focused approach to innovation.

We are seeking a Software Engineer with deep expertise in Rust and familiarity with embedded systems development to join our cross-functional engineering team. In this role, you’ll work across the stack—from low-level embedded Rust and gateware integration to higher-level Rust application interfaces, with exposure to frontend technologies. You’ll collaborate closely with hardware, firmware, and application teams to build reliable, high-performance systems.

While a physics background is not required, experience working with physical systems or scientific instrumentation is beneficial. The ideal candidate is fundamentally a software engineer, with strong embedded systems intuition and a commitment to continually deepening their technical expertise.

Job Responsibilities

• Collaborate closely with cross-functional teams—including hardware engineers, physicists, and software developers—to deliver fully integrated product solutions.
• Maintain documentation of designs, workflows, and processes in compliance with internal and regulatory standards.
• Contribute to integrating Rust-based middleware and driver software used for device control.
• Collaborate with hardware and FPGA teams to develop software drivers and interfaces for embedded devices.
• Develop and maintain system-level APIs and communication layers
• Contribute to frontend development where needed to support tooling, visualization, or user interfaces
• Write clean, well-tested, and well-documented code
• Participate in code reviews and technical design discussions

• Bachelor’s degree in computer science, Electrical or Computer Engineering, or a related technical discipline (or equivalent practical experience)
• Minimum of 5 years of industry experience in Rust Development
• Exposure to embedded software development using Rust and/or C++.
• Working knowledge of gateware development and hardware/software integration (e.g., FPGA-based systems)
• Exposure to frontend development (e.g., JavaScript/TypeScript, React, or similar frameworks).
• Strong background in developing and debugging embedded Linux environments.
• Familiarity with embedded and system-level communication interfaces (SPI, I²C, UART, PCIe, Ethernet, etc.)
• Solid understanding of systems programming concepts (memory safety, concurrency, performance)

Nice to Have

• Background in high-reliability or performance-critical systems
• Knowledge of WebAssembly (WASM) and Rust-based frontend frameworks
• Familiarity with real-time operating systems (RTOS) and bare-metal development.
• Demonstrated experience in architecting embedded control systems and integrating them into hardware platforms.

We highly value

• Excellent verbal and written communication skills, with the ability to effectively share information with both technical and non-technical audiences
• Strong collaboration and engagement skills, with a sense of ownership, pride in your work, and a constant drive for success
• A strong sense of urgency and responsibility, paired with attention to detail where it matters most
• An open communication style and a positive, professional attitude reflected in daily work habits
• Strong problem-solving skills and the ability to learn quickly in new domains
• The ability to work with a high degree of autonomy—taking high-level goals and defining, resourcing, and executing an effective plan—while also collaborating closely and incorporating feedback from teammates as needed

• Salary range: $131,000 to $231,000

• 100% company-paid medical, dental, vision, short/long-term disability
• Employer-funded Health Savings Account
• Unlimited PTO
• 401(k) match
• Company-paid Life and AD&D Insurance
• Flexible Savings Account
• Paid FMLA, Maternity/Paternity Leave
• Employee Assistance Program
• Student Loan Repayment
• Equity Program