Quantum Applications Architect (Differential Equation Solvers)


Palo Alto, CA, US
  • Job Type: Full-Time
  • Function: Engineering Software
  • Post Date: 05/15/2024
  • Website: psiquantum.com
  • Company Address: 700 Hansen Way, Palo Alto, California 94304, US

About PsiQuantum

Quantum computing will be a world-changing technology with the potential to unlock powerful advances in medicine, energy, finance and beyond. At PsiQuantum, we’re focused on building the world’s first useful quantum computer.

Job Description

PsiQuantum is on a mission to build the world’s first fault tolerant quantum computer capable of tackling today’s most intractable computational challenges to deliver transformative results.    We know that means it will need roughly 1 million qubits and will be building scale in size. 

Quantum computing is expected to deliver breakthroughs for today’s still impossible computational tasks. By harnessing the laws of quantum physics, quantum computers can provide exponential performance increases over even the most powerful of today’s conventional supercomputers offering the potential for extraordinary advances across a broad range of applications including climate, energy, healthcare, pharmaceuticals, finance, agriculture, transportation, materials design, and many more. 

PsiQuantum is uniquely positioned to deliver on the promise of quantum computing. Our architecture is based on photonics which gives us the ability to produce our components using high-volume semiconductor manufacturing processes, the same processes that have been applied in telecommunications and data center applications for decades.  Since photons don’t feel heat, we can take advantage of existing cryogenic cooling systems, the kind that have been operating at facilities like Stanford Linear Accelerator (SLAC) since 2018.  And because photons are basically light, they can move between subsystems using standard fiber connectivity, without the need for transduction in and out. 

Our team is working across the full stack of quantum computing, from quantum architecture to photonic chip manufacturing, advanced opto-electronic packaging, hardware systems design, quantum algorithms and software tools, and cryogenic cooling.   We’re a highly motivated and collaborative group focused on a singular goal - building the world’s first Fault Tolerant Quantum Computer on the fastest path possible. 

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

Job Summary:

Quantum applications architects drive research and development of quantum algorithms and lead partnered collaborations on the application of quantum algorithms to real-world computational problems. The applications team is fully focused on algorithms in the fault tolerant regime and is very tightly integrated with quantum architecture development. The scope of the quantum applications team includes development of new quantum algorithms and methods, scoping of use-cases, simulation and analysis of resource requirements, optimization of compiling methods and development of methods for universal fault tolerant logic.

This role is specifically focused on the development of quantum algorithms to solve linear and differential equations. The architect will translate computational tasks into abstract specifications for quantum algorithms, understand their asymptotic performance, work to define post-classical problem instances, and collaborate with the compilation team to build explicit instantiations of said algorithms.


  • Research and development of quantum algorithms tailored for fault-tolerant quantum computers, particularly around differential equations.
  • Work closely with external partners to instantiate, validate and optimize quantum algorithms for use cases across domains in this category, such as in fluids and plasma physics.
  • Establish benchmarks and problem instances to validate post-classicality of quantum algorithms.
  • Simulation and analysis of resource requirements for fault tolerant implementation of quantum algorithms in photonic quantum computing.
  • Collaborate with quantum architecture group to co-optimize algorithm methods with architectural design.


  • Degree in Physics, Math or Computer Science or equivalent required. PhD in Physics, Math or Computer Science, with a focus on quantum information theory or quantum computation preferred.
  • 3+ years of relevant academic or industry research experience in quantum algorithms, quantum applications or quantum circuit compilation preferred.
  • Experience with quantum algorithms and compiling in the regime of fault tolerant gates preferred.
  • Experience working with partners in academia or industry to analyze real-world quantum applications of interest preferred.
  • Proven team player with an ability to work effectively across departments, sites and time zones.
  • Ability to work independently and contribute to fast-moving start-up environment.
  • Experience programming in Python, C++ or similar languages.

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.

We are not accepting unsolicited resumes from employment agencies.

The range below reflects the minimum and maximum target range for new hire base salary across all US locations. Actual compensation may vary outside of this range and is dependent on various factors including but not limited to a candidate's qualifications including relevant education and training, competencies, experience, geographic location, and business needs. Base pay is only one part of the total compensation package. Full time roles are eligible for equity and benefits. Base pay is subject to change and may be modified in the future.

For a fully qualified candidate, the expected pay range is: 

Pay Range
$140,000—$205,000 USD

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Disclaimer: Local Candidates Only
This company does NOT accept candidates from outside recruiting firms. Agency contacts are not welcome.