Senior Software Engineer, Simulation

Quantum computing holds the promise of humanity’s mastery over the natural world, but only if we can build a real quantum computer. PsiQuantum is on a mission to build the first real, useful quantum computers, capable of delivering the world-changing applications that the technology has long promised. We know that means we will need to build a system with roughly 1 million qubits that supports fault tolerant error correction within a scalable architecture, and a data center footprint.

By harnessing the laws of quantum physics, quantum computers can provide exponential performance increases over today’s most powerful supercomputers, offering the potential for extraordinary advances across a broad range of industries including climate, energy, healthcare, pharmaceuticals, finance, agriculture, transportation, materials design, and many more.

PsiQuantum has determined the fastest path to delivering a useful quantum computer, years earlier than the rest of the industry. Our architecture is based on silicon photonics which gives us the ability to produce our components at Tier-1 semiconductor fabs such as GlobalFoundries where we leverage high-volume semiconductor manufacturing processes, the same processes that are already producing billions of chips for telecom and consumer electronics applications. We also benefit from the quantum mechanics reality that photons don’t feel heat or electromagnetic interference, allowing us to take advantage of existing cryogenic cooling systems and industry standard fiber connectivity.

In 2024, PsiQuantum announced two government-funded projects to support the build-out of our first Quantum Data Centers and utility-scale quantum computers in Brisbane, Australia and Chicago, Illinois. Both projects are backed by nations that understand quantum computing’s potential impact and the need to scale this technology to unlock that potential. And we won’t just be building the hardware, but also the fault tolerant quantum applications that will provide industry-transforming results.

Quantum computing is not just an evolution of the decades-old advancement in compute power. It provides the key to mastering our future, not merely discovering it. The potential is enormous, and we have the plan to make it real. Come join us.

There’s much more work to be done and we are looking for exceptional talent to join us on this extraordinary journey!

Job Summary:

The OS Core team at PsiQuantum works closely alongside engineers and scientists in the electronics, system architecture, and validation teams to develop scalable, high performance systems software for the operation, control, calibration, and management of PsiQuantum’s photonic quantum computers. As a software engineer, simulation on the OS Core team you will build the simulation and emulation systems that serve as a foundation for our co-design process and enable our team to rapidly develop software for prototype hardware, work closely with engineers and scientists spanning multiple disciplines, and contribute to the future of computing in a foundational way.

Responsibilities:

• Design and implement high-performance simulation software for photonic quantum computing electronic subsystems
• Create accurate models of electronic control systems that interface with photonic components
• Develop real-time signal processing algorithms for quantum state measurement and feedback
• Collaborate with hardware engineers to validate simulation models against experimental data
• Participate in design and code reviews.
• Collaborate across software, hardware, and research teams at PsiQuantum.
• Testing and maintainence of control software.
• Document code, models, and simulation architecture for knowledge transfer.

Experience/Qualifications:

Required skills and experience:

• Bachelors degree in a technical discipline, or equivalent experience.
• Strong programming ability in at least one systems programming language (C++, Rust, C).
• 5+ years of software development experience in a technical computing environment.
• Demonstrated experience designing and implementing simulation software
• Track record of optimizing code for performance in computationally intensive applications.
• Experience working with hardware-in-the-loop testing or hardware/software co-design.
• Proven ability to work effectively in cross-functional teams.
• Proficiency with scientific computing libraries and numerical methods.
• Experience with electronic circuit modeling and simulation techniques.
• Knowledge of signal processing fundamentals and filter design.
•  Understanding of concurrent programming and parallel computing concepts.
• Familiarity with version control systems and collaborative development workflows.
• Excellent problem-solving abilities for debugging complex simulations

Ways to stand out:

• Experience with internals of QEMU or other computer emulators.
• Knowledge of quantum computing fundamentals and quantum information theory.
• Familiarity with photonics principles and integrated photonic devices.
• Experience with Python or Julia for scientific computing and visualization.
• Understanding of control systems theory and feedback mechanisms.
• Proficiency with GPU programming (CUDA, OpenCL).
• Experience with distributed computing frameworks.
• Experience with RPCs, RESTful APIs, IDLs, data serializations (protobufs, gRPC, JSON, etc.).
• Experience with Apache Airflow or other workflow management platforms

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.