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Software Engineer, Quantum Systems Validation

PsiQuantum

$140,000 - $180,000
Oct 17, 2025
Milpitas, CA, US
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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. This requires building a system with roughly 1 million qubits that supports fault tolerant error correction within a scalable architecture, and a data center footprint. The Quantum Systems Validation team is responsible for characterizing the performance of integrated quantum optical systems and subsystems, and needs software tools to enable physicists and engineers to configure, test and validate system designs efficiently.

Requirements

  • Advanced knowledge of Python including libraries for data analysis, unit testing, and Web APIs.
  • Extensive experience using Git for version control in a collaborative software environment.
  • Experience teaching or mentoring software development skills, especially for colleagues with academic or scientific backgrounds.
  • Familiarity with quantum physics, photonic integrated circuits, digital electronics, fiber networking, or related domains.
  • Experience with data visualization tools such as Tableau, PowerBI, Python Dash, or JMP.
  • Experience with relational or document-based databases such as: PostgreSQL, SQLite, Mongo, and S3.
  • Experience with CI/CD tools such as GitLab, GitHub, or Jenkins.

Responsibilities

  • Design and implement software tools that focus on internal user needs and allow for a long-running, ever-evolving system.
  • Enable physicists and engineers to develop test scripts, share data, and validate photonic quantum computer systems performance.
  • Build robust unit, integration, and hardware-in-the-loop tests to ensure system stability.
  • Collaborate across teams to debug issues, provide rapid solutions, and contribute to long-term design improvements.
  • Partner with design teams to define validation objectives and ensure system designs meet those requirements.
  • Write requirements for data, APIs, and hardware features that will be provided by other teams.

Other

  • Ability to work independently with limited direction and manage responsibility and ownership for delivering validation objectives.
  • Excellent verbal and written communication skills with an ability to communicate effectively to a variety of audiences including senior leadership and technical experts.
  • Demonstrated interest in PsiQuantum’s mission and vision for quantum computing, with an ability to contribute within a fast-paced start-up environment consistent with PsiQuantum’s values of communication, collaboration, respect, results, and challenge.
  • Bachelor’s degree in computer science, mathematics, physics, engineering, or a related field.