Infleqtion · 3 weeks ago
Senior Photonics Design, Layout & Modeling Engineer
Louisville, CO
Full-time
Onsite
Mid, Senior Level
$130K/yr - $150K/yr
4+ years expInfleqtion is commercializing quantum technology, building deployable systems where photonics is the engine for performance, scale, and reliability. They are seeking a Senior Photonics Design, Layout & Modeling Engineer to design and deliver next-generation photonic integrated circuits and photonic subassemblies, focusing on simulation-driven design and rapid experimental feedback.
ElectronicsManufacturingMechanical DesignMechanical EngineeringQuantum Computing
No H1B
U.S. Citizen Only
Responsibilities
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
Qualification
Required
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)
This position involves access to export-controlled information and/or technology. To comply with U.S. Export Control laws and regulations, candidates must be a U.S. Person (U.S. citizen, U.S. lawful permanent resident)
Preferred
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
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
Company
Infleqtion
Infleqtion is a quantum information company that develops software-configured and quantum-enabled products.
201-500 employees
Funding
Current Stage
Growth StageTotal Funding
$307.83MKey Investors
U.S. Department of DefenseUK Research and InnovationUS Department of Energy
2025-09-08Acquired
2025-06-02Series C· $100M
2024-12-02Grant· $11M
Leadership Team
Matthew Kinsella
Chief Executive Officer
Alok Gupta
Chief Financial Officer
Recent News
2026-02-05
2026-02-05
Company data provided by crunchbase