Infleqtion

Senior Photonics Design, Layout & Modeling Engineer

Infleqtion

full-time

Posted on:

Location Type: Hybrid

Location: Louisville • Colorado • United States

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Job Level

Senior

Tech Stack

Python

About the role

  • Own and deliver high-performance photonic component designs and PIC layouts that meet aggressive specs (loss, bandwidth, phase stability, power handling, crosstalk, yield).
  • Build simulation-to-layout workflows that accelerate design cycles (PDK integration, reusable parameterized cells, verification automation).
  • Drive tapeout readiness: coordination, foundry alignment, mask submission deliverables, and post-tapeout debug loops.
  • Close the loop with the lab: define test plans, review data, troubleshoot discrepancies, and translate measurements into actionable design improvements.
  • Collaborate across teams to ensure PIC-level design choices support system-level performance, reliability, and manufacturability.

Requirements

  • M.S. or Ph.D. in Electrical Engineering, Applied Physics, Photonics, or a related field (or equivalent practical experience).
  • [4]+ years of relevant experience designing integrated photonics (Si, SiN, InP, or related platforms) with demonstrated taped-out designs or comparable project outcomes.
  • Advanced proficiency in photonics simulation and modeling (e.g., EME, FDTD, FEM, BPM, eigenmode, circuit-level/Interconnect modeling) and comfort validating models against measurement.
  • Hands-on experience with photonic layout and verification (PDK usage, hierarchy management, mask/tapeout deliverables).
  • Proficiency with Python for design automation, analysis, and workflow tooling; comfort working with version control (Git).
  • Practical experimental familiarity: common optical test equipment and techniques (fiber coupling/alignment, insertion loss, spectrum analysis, polarization handling, interferometric/phase-sensitive measurements, basic RF/optical modulation measurements).
  • **We Highly Value:**
  • Multiple tapeouts at commercial foundries, including direct foundry interface and post-silicon debug.
  • Experience with common photonics toolchains (e.g., Lumerical, Synopsys, COMSOL) and layout stacks (e.g., KLayout, gdsfactory).
  • Experience designing PIC-based laser subsystems (hybrid/heterogeneous gain integration), micro-combs, narrow-linewidth sources, or frequency control photonics.
  • Familiarity with photonic packaging constraints (edge/vertical coupling, alignment tolerances, thermal effects) and how they feed back into PIC design.
  • Strong communication and presentation skills; ability to work effectively with external partners (foundries, packaging, vendors).
Benefits
  • Benefits
  • - 100% company-paid medical, dental, vision, short/long-term disability
  • - Employer-funded Health Savings Account
  • - Unlimited PTO
  • - 401(k) match
  • - Company-paid Life and AD&D Insurance
  • - Flexible Savings Account
  • - Paid FMLA, Maternity/Paternity Leave
  • - Employee Assistance Program
  • - Student Loan Repayment
  • - Equity Program

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
photonic component designPIC layoutphotonic simulationmodelingdesign automationoptical test techniquestapeout readinesshierarchy managementmask submissionpost-silicon debug
Soft skills
strong communication skillspresentation skillscollaborationtroubleshootingactionable design improvements
Certifications
M.S. in Electrical EngineeringPh.D. in Electrical EngineeringM.S. in Applied PhysicsPh.D. in Applied PhysicsM.S. in PhotonicsPh.D. in Photonics