Senior Software Engineer, Control & Calibration

PsiQuantum'smission is to build the first useful quantum computers-machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems.

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries.

Our architecture and approachisbased on silicon photonics. Byleveragingthe advanced semiconductor manufacturing industry-including partners like GlobalFoundries-we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photonsdon'tfeel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure.

In 2024,PsiQuantumannounced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining-and that now is the time to scale.

PsiQuantumalso develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies-including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical-to prepare quantum solutions for real-world impact.

Quantum computing is not an extension of classical computing. Itrepresentsa fundamental shift-and a path to mastering challenges that cannot besolvedany other way. The potential is enormous, and we have a clearpathto make it real.

Come join us.

Job Summary:

The Control Software & OS Core Team at PsiQuantum works closely alongside engineers and scientists in the electronics, system architecture, and validationteams and is responsible for building the scalable, distributed, fault-tolerant control plane and operating system for utility scale photonic quantum computers. Our team is responsible for orchestration, scheduling, kernel architecture, co-design, calibration, validation, providing abstractions, systems, and operating software for the immense heterogenous fabric of co-processors, networks, and photonics that are critical to the success of our company's goal of building the world's first useful quantum computer. As a Senior Software Engineer, Calibration & Control you will design and implement the next generation of calibration algorithms, controls, and software that keep our quantum processors in spec 24O7x365.

Responsibilities:

Experience/Qualifications:

• 5+ years professional software engineering; 3+ years in feedback-control, calibration, robotics, or analogous real-time domains.
• Fluency in Python or Julia, particularly in the context of scientific computing, AI/ML, or signal processing.
• Fluency in Rust and/or C++17+; comfortable writing lock-free, wait-free, and numerically stable code paths.
• Proven track record delivering production systems with real-time or ultra-low-latency requirements.
• Hands-on experience interfacing with hardware over PCIe, Ethernet, or custom serial buses; confident reading schematics & timing diagrams.
• Working knowledge of Linux internals (irq, cgroups, NUMA, hugepages) and high-performance networking stacks.
• Strong foundation in one or more of: quantum information processing, artificial intelligence, robotics, control theory, optimization, signal processing, or experimental physics.
• B.S. in CS, EE, Physics, or related discipline (or equivalent practical experience).

Ways to Stand Out:

• M.S./Ph.D. focused on numerical optimization, control systems, photonics, computer science, or quantum information.
• Demonstrated experience accelerating numerical Python workflows using Mojo, Jax, PyTorch, or similar.
• Experience with sub-nanosecond clock-sync protocols.
• Familiarity with FEC and/or QEC (forward error correction / quantum error correction) concepts, stabilizer circuits, fusion-based architectures, or tensor-network simulation.
• On-device ML for adaptive calibration (Gaussian processes, RL bandits).
• GPU / CUDA-accelerated numerical kernels (cuBLAS/cuFFT/cuQuantum) and/or GPU-Direct RDMA pipelines.
• Contributions to open-source control or scientific-computing projects.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.