Quantum Software Engineer Compiler & Control Systems

This Quantum Software Engineer role will join the Compiler Team within Infleqtions Quantum Software organization. The role will design build and maintain quantum compilation software with particular responsibility for the interface between quantum circuits error-correction software and hardware control systems.

The role combines hands-on software development system design code review and R&D. It will contribute to co-design efforts spanning applications algorithms compilation error decoding hardware and control. Ideal candidates have a strong software engineering background and are interested in learning the quantum-computing and hardware-control context needed for the role.

This role is open to both entry-level and senior-level candidates.

• The duties and responsibilities outlined below include essential functions of the role. Depending on business needs this role may perform a combination of some or all of the following duties. Duties responsibilities and activities may change or new ones may be assigned.
• Conduct R&D toward advances in quantum compilation execution and fault-tolerant quantum computing similar to work described in and and implement software interfaces and intermediate representations that translate compiled quantum circuits into executable control-system programs including gate operations timing qubit movement measurement and other hardware functionality.
• Develop software that connects quantum error-correction circuits with decoding and execution systems including representation and processing of measurement results syndrome data decoder outputs and Pauli-frame updates.
• Collaborate with hardware control and experimental teams to define stable well-documented interfaces between compilation software and the control system.
• Build tooling to validate simulate test and debug circuit-to-control translations including timing constraints hardware capabilities and execution results.
• Deploy software optimizations to our cloud platform Superstaq using industry-grade software engineering procedures including documentation linting testing type checking and code review.
• Contribute to development of government and commercial proposals and execution on global programs.
• Collaborate with experimental physicists control engineers and software engineers to bridge theoretical concepts and practical implementation.
• Engage with the broader scientific community by publishing research findings in scientific journals and presenting at conferences.
• Stay up to date with developments in compiler design quantum computer architecture control systems error correction decoding and related fields.
• Provide guidance and support to other team members fostering a collaborative research environment.

• Bachelors degree in computer science engineering physics or a directly related field.
• High proficiency in programming with fluency in Python preferred. Proficiency in C Rust or another systems-oriented language with the ability to rapidly upskill in Python is also welcome.
• Experience designing building or maintaining complex software systems such as compilers intermediate representations runtimes simulators distributed systems embedded/control software or performance-critical scientific software.
• Ability to reason clearly about software interfaces data models APIs and the tradeoffs between abstraction performance and maintainability.
• Experience with software testing and debugging including unit tests integration tests type checking version control and CI/CD practices.
• Demonstrated ability to work and communicate with all levels of an organization including professional verbal written and presentation skills.
• Demonstrated ability to work comfortably in a highly collaborative cross-functional team-oriented and matrixed environment.
• Demonstrated ability to learn new and complex topics quickly including a willingness to develop familiarity with quantum -computing concepts through work with domain experts.
• Resourceful problem-solver who collaboratively identifies effective paths forward and can execute productization efforts.
• Passion for solving complex problems and challenges in a highly technical and scientific environment.
• Ability to be in the office any three days per week.
• Ability to travel domestically and potentially internationally up to 10%.

• Experience with compiler infrastructure scheduling instruction selection intermediate representations program analysis or code generation.
• Experience with real-time embedded hardware-control or scientific-instrumentation software; familiarity with timing-sensitive execution systems is particularly valuable.
• Experience building software that integrates measurement data feedback calibration data telemetry or other hardware-generated data into an execution pipeline.
• Familiarity with quantum error correction decoders stabilizer simulation fault tolerance or syndrome processing.
• Familiarity with quantum computing concepts such as native gate decomposition qubit mapping and routing circuit scheduling and hardware-aware compilation.
• Experience with open-source quantum software frameworks such as Cirq Qiskit Stim or similar tools.
• Experience developing or optimizing scientific simulation decoding or data-processing workloads for high-performance computing environments including GPU-accelerated or distributed systems.
• Experience with backend development using tools such as FastAPI PostgreSQL or SQLAlchemy.
• Experience with cloud development especially on GCP or AWS.
• Familiarity with security best practices including access control encryption at rest key rotation and logging.
• Exposure to or interest in front-end or GUI development such as HTML/CSS React or PyQt.

• Salary range: $145000 to $170000 per year
• 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 Package

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.

Note

This position may require access to information protected under U.S. export control laws and regulations for quantum computing technology. Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.

Contact Information

If this opportunity interests you and you fit the job description please submit an application.If you need assistance or an accommodation due to disability please feel free to contact us at .

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Required Experience:

IC