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Senior Software Engineer



Software Engineering
Palo Alto, CA, USA
Posted on Thursday, May 23, 2024

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:

PsiQuantum's Photonic Circuits team is at the forefront of pioneering advancements in quantum computing technology. This multidisciplinary team, consisting of physicists and engineers, plays a crucial role in the company's core mission by designing and validating the hardware that underpins our quantum computing machines. We are seeking an experienced Senior Software Engineer who is passionate about enabling software infrastructure for hardware innovations. The ideal candidate will have the opportunity to significantly impact our processes, by creating software solutions tailored to our complex hardware challenges and data pipeline requirements


  • Design, develop, and maintain software infrastructure and solutions to support hardware design, validation, and data management.
  • Support and enhance existing backend and frontend tools.
  • Test and debug software to ensure functionality and reliability.
  • Collaborate with cross-functional teams to define, design, and deploy new SW features.
  • Write clean, efficient, and well-documented code.


  • Bachelor's degree in Computer Science, Engineering, or related field with 5-8 years of experience.
  • Proven experience as a Full Stack Developer or similar role.
  • Strong proficiency in Python, Git, Bash, JavaScript, and SQL.
  • Experience with frontend and backend development.
  • Knowledge of databases (e.g., MySQL, PostgreSQL) and ORM frameworks.
  • Design, develop, and maintain APIs for integration with other applications.
  • Familiarity with React, Vue, and/or Svelte frontend frameworks.
  • Experience with software solutions for hardware applications is a plus.

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
$168,000$220,000 USD