Senior Optical Fiber Design Engineer

Psi Quantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million‑qubit, fault‑tolerant quantum systems.

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries.

Our architecture and approach are based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like Global Foundries—we use the same high‑volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber‑optic infrastructure.

The Senior Optical Fiber Network Design Engineer reports into the System Design organization. This role supports the Optical Distribution Network (ODN) design and integration for current and future systems. This includes the design, development, integration, and validation of the fiber network and hardware to support the complex fiber network needed in our quantum systems.

• Support end‑to‑end system fiber link architecture connecting subsystems, PICs and control systems.
• Create detailed fiber designs for complex optical distribution networks, including routing, splice plans, and overall optical I/O.
• Contribute to link budgets and calculations to meet System Architecture requirements for worldline loss.
• Define guidelines for fiber routing, splicing, connectorization, cleanliness, and handling to meet quantum performance thresholds.
• Work with vendors and evaluate advanced fiber optic components, and qualify such components for use in quantum computing applications.
• Perform some Python scripting, calling Controls SW APIs/drivers to control lab equipment and proprietary systems.
• Communicate clearly and collaborate cross‑functionally.

• M.S. or Ph.D. in Physics, Optical or Electrical Engineering with 3+ years industry experience.
• 5+ years experience designing, validating, and testing fiber networks and fiber optical systems.
• Experience in fiber optics, including loss mechanisms, dispersion, nonlinear effects, polarization, and phase stability.
• Experience designing fiber optic systems, fiber networking and working with advanced splice equipment and optimization, fiber handling and routing.
• Experience working with optical test equipment including power meters, optical back scatter reflectometers (O ), optical spectrum analyzers (OSA).
• Experience with instrumentation used in the photonics and/or electronics industry.
• Experience with software controls in Python.
• Experience developing test methods and optimization, tuning algorithms.
• Experience in product life cycles, transitioning from R&D to product development.
• Strong organizational skills, excellent communication skills, attention to detail and ability to multitask.
• Strong critical thinking, creative, innovative, analytical, and detail‑oriented problem‑solving skill.
• Ability to work in a fast‑paced environment and collaborate with cross‑functional teams.

Psi Quantum provides equal employment opportunity for all applicants and employees. Psi Quantum 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.