Senior Software Engineer (Quantum Computing)

Infleqtion; Madison (WI); On-site; USD 106,000 - 145,000; Full time

Benefits offered by this job

Total Rewards program

100% company paid benefits

401(k) Matching

Job summary

Infleqtion is 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 design, build, and maintain backend services and control systems that drive our neutral atom quantum machines, collaborating with scientists and engineers to deliver high‑quality software at scale.

Qualifications

• Bachelor's degree in CS, applied math, physics or related field.
• 5+ years of work experience in software engineering.
• Experience with Python and at least one compiled language, willingness to learn Rust.
• Experience with Linux and Docker virtualization.
• Good verbal and written communication skills for cross-functional collaboration.
• Familiarity with testing, debugging, version control, and documentation.

Responsibilities

• Design, develop, and deploy backend services and frameworks that control and calibrate quantum computers.
• Collaborate with scientists, opto-mechanical engineers, and electrical engineers to solve complex problems.
• Mentor junior engineers and promote best practices in engineering and code quality.
• Lead code and design reviews and uphold engineering standards.

Skills

Python

Rust

Linux

Docker

Communication

Team collaboration

Testing & debugging

Documentation

Education

Bachelor's degree in Computer Science, Applied Mathematics, Physics or related field

Tools

Numpy

Scipy

PyTorch

Job description

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.

At Infleqtion we embrace a startup mentality driven by results, urgency, and customer-focused innovation:

• 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.

Job Responsibilities

• 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

Requirements

• 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

PREFERRED EXPERIENCE

• 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 timeseries data, SQL, and ETL processes
• Experience creating CI/CD pipelines, and Python package creation with C or Rust extensions

Benefits

The targeted salary range for this role is $106,000 to $145,000 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

Equal Opportunity

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.