Senior Quantum Software Engineer — Backend & Control

Infleqtion; Chicago (IL); On-site; USD 160,000 - 185,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Short/Long Term Disability

Health Savings Account

Unlimited PTO

401(k) Matching

Life and AD&D Insurance

Flexible Healthcare Savings Account

Paid FMLA Leave

Paid Maternity/Paternity Leave

Employee Assistance Program

Student Loan Repayment

Job summary

Infleqtion is building quantum computers and seeking a backend software engineer to write the software that runs them. This production-first role requires hands-on coding and collaboration with physicists and hardware engineers to translate complex requirements into software that controls real quantum machines.

You will own backend services, calibrate systems, and develop tooling for scientists to run experiments independently, with a focus on reliability and scalable architectures.

Qualifications

• 6+ years of backend software engineering in a rigorous environment.
• Proficient in Python and hands-on C++ or Rust; both is a strong advantage.
• Experience building scientific/experimental data pipelines and ETL.
• Experience with real-time data, time-series storage, and databases.
• Ability to translate complex scientific requirements into production software.
• Familiarity with statistics, machine learning, or AMO physics is a differentiator.

Responsibilities

• Write, own, and ship production backend services and control frameworks for quantum computers.
• Debug and support all layers of the control stack from embedded kernels to distributed services.
• Build tooling enabling scientists and engineers to run experiments independently.
• Develop and maintain CI/CD pipelines and containerized deployments (Docker/Kubernetes).
• Work with experimental data including time-series and image analysis from live systems.

Skills

Python

C++

Rust

Data pipelines

NumPy/SciPy

PyTorch

CI/CD

Education

Degree in Computer Science, Physics, Applied Mathematics, or related field

Tools

Docker

Kubernetes

Job description

Infleqtion is building quantum computers and seeking a backend software engineer to write the software that runs them. This production-first role requires hands-on coding and collaboration with physicists and hardware engineers to translate complex requirements into software that controls real quantum machines.

You will own backend services, calibrate systems, and develop tooling for scientists to run experiments independently, with a focus on reliability and scalable architectures.