Senior Software Engineer, PsiQuantum
Simulation & Emulation
$166-210k
Quantum computer builder
Job no longer available
Quantum computer builder
501-1000 employees
Job no longer available
$166-210k
501-1000 employees
Company mission
To build and deploy useful, fault tolerant quantum computers.
Role
Who you are
- 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
Desirable
- 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
What the job involves
- 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
- 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
Our take
Quantum computing will change the world more than any other imminent technological development, and PsiQuantum sits at the forefront of the charge to build the first quantum computer that will actually work.
The company is unique for the scale of their ambitions. Rather than focusing on what they term “intermediate milestones” like building smaller proof of concept systems, PsiQuantum builds the first large-scale, error-corrected computer, using photonics to deliver over 1,000,000 qubits (current quantum machines have yet to cross the 1,000 qubit mark).
There are plenty of companies building quantum computers, including the likes of IBM and Google, but these prototypical machines lack the size to correct errors, making them exponentially less useful than what PsiQuantum aims for. While other companies operate in the same sphere, PsiQuantum is unequivocally a leader in its field, founded by world-class academics and recently securing $1B in funding, making it the largest funding round for a quantum computing startup.
Steph
Company Specialist at Welcome to the Jungle
Insights
16% employee growth in 12 months
Company
Funding (last 2 of 8 rounds)
Jun 2025
$1bn
GROWTH EQUITY VC
Apr 2025
$0.6m
GRANT
Total funding: $2.7bn
Company benefits
- Financial & Retirement: 401(k) with company match, equity grants, and access to financial wellness tools and planning resources.
- Health: Competitive health coverage for you and your dependents that go beyond your standard medical, dental & vision.
- Wellness: $200 quarterly health reimbursement, 12 therapy + 6 coaching sessions with Modern Health for you and depndents, and annual membership to Care.com.
- Time Off: Discretionary Time Off (DTO) for full-time employees in addition to federal holidays and an end-of-year company shut-down.
- Family Leave: 12 weeks of paid parental leave with the support of a dedicated leave consultant.
- Flexible WOrk: Work in office, hybrid, or remote depending on your team and location.
Company HQ
Palo Alto, CA
Leadership
Jeremy O'Brien
(Co-Founder & CEO)Prior to founding PsiQuantum, researched and taught at universities across the world, including Bristol, Stanford, Osaka, Sydney and Queensland.
Mark Thompson
(Co-Founder & Chief Technologist)Previously worked as an R&D Engineer at Toshiba and was a research fellow at the University of Cambridge. Is currently a Professor of Quantum Photonics at Bristol University as well as Chief Technologist at PsiQuantum.
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