Quantum Software Engineer

Position Summary

This Quantum Software Engineer role will join the Compiler Team within Infleqtion’s 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.

Job Responsibilities

• 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 https://arxiv.org/abs/2309.05157 and https://arxiv.org/abs/2509.13247.
• Design 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.