Sr Software Engineer

About Infleqtion

Infleqtion is on a mission to commercialize atom-based quantum technologies that deliver orders-of-magnitude improvements in sensing and computing applications. We are seeking self‑motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our Quantum Computing mission forward.

• We break down barriers between disciplines, stepping in wherever we can make the biggest impact
• We thrive in uncertainty, embracing challenges as opportunities
• We move quickly to prototype while never losing sight of the critical importance of systems engineering process and attention to detail
• We take bold, calculated risks to drive progress

We are seeking a Senior Software Engineer to join the team building the control system software for Infleqtion's quantum computers. The ideal candidate is an experienced backend engineer with a strong background in creating robust and scalable scientific applications. You will play a crucial role in designing, building, and maintaining backend services and control systems that drive our neutral atom quantum machines.

• Design, develop, and deploy reliable, maintainable, scalable, and fault‑tolerant backend services and frameworks that control and calibrate our neutral atom quantum computers
• Collaborate with interdisciplinary teams, including scientists, opto‑mechanical engineers, and electrical engineers, to solve complex problems and deliver high‑quality software solutions
• Empower interdisciplinary teams to create the tools they need by teaching engineering and programming best practices
• Mentor and guide junior engineers, fostering their growth and enhancing the team's technical expertise
• Lead code and design reviews, upholding engineering best practices and promoting a culture of quality and collaboration
• Support and debug all layers of the control stack from real‑time embedded kernels to distributed services
• Advocate for and implement innovative software development methodologies and tools to improve team efficiency and product quality

• Bachelor's degree in Computer Science, Applied Mathematics, Physics or related field and a minimum of 5 years prior work experience
• Experience with Python and at least one compiled language, with a desire to learn and work in Rust
• Experience with Linux and virtualization technologies like Docker
• Good verbal and written communication skills, able to effectively share information with technical and non‑technical staff
• Good collaboration skills, able to work in a team environment where engagement and participation are an expected part of successful job performance
• Skilled in typical software engineering disciplines: testing, debugging, revision control, error‑handling, readability, documentation, general code health, etc
• Desire to constantly improve and learn inside and outside of expertise

• Domain‑specific experience in statistics, machine learning, or AMO physics
• Experience with Numpy, Scipy, and Pytorch
• Experience with image analysis, emphasis on realtime object detection
• Experience with databases (relational and non‑relational) including but not limited to time series data, SQL, and ETL processes
• Experience creating CI/CD pipelines, and Python package creation with C or Rust extensions

The targeted salary range for this role is $106,000 to $141,000 on an annualized basis plus eligibility to participate in our annual incentive plan.

In addition to your base compensation, we offer a generous Total Rewards program which includes:

• 100% company paid Employee coverage for Medical, Dental, Vision, and Short/Long Term Disability insurance programs
• Employer funded Health Savings Account
• Unlimited Paid Time Off
• 401(k) Matching Programs
• Company paid Life and AD&D Insurance
• Flexible Healthcare Savings Account
• Paid FMLA Leave
• Paid Maternity/Paternity Leave
• Employer Assistance Program
• Student Loan Repayment

Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin color, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs.

We are proud to be an Equal Employment Opportunity Employer.