Phizenix

Phizenix

Senior Principal Firmware Engineer

Santa Clara, CA · Principal

Sponsorship not specified$200k-$250kDetected 43 days ago
PythonC++AlgorithmsGitCI/CDJiraEmbedded SystemsSignal ProcessingCommunicationCollaboration

About the role

  • This is a highly technical individual contributor role with broad program ownership across one or more coherent optical module programs.

Responsibilities

  • Own firmware development for coherent optical module programs (e.g., 400ZR/ZR+, 800ZR), from architecture through production release
  • Lead program-level firmware efforts, including bring-up, calibration, validation, and customer delivery milestones
  • Design and implement advanced firmware features such as hitless firmware upgrade, CMIS compliance, bootloader architecture, calibration and control engines, and hardware adaptation layers
  • Drive cross-functional collaboration with DSP, hardware, ATE, and test engineering teams to resolve complex system-level issues
  • Support customer engagements - respond to technical inquiries, debug field issues, and deliver firmware solutions that meet hyperscaler and carrier requirements
  • Strong background in bootloader design, firmware upgrade mechanisms (including hitless/in-service upgrade), and flash management

Requirements

  • Senior Principal Engineer, Software/Firmware - coherent optical module firmware/SoC-based embedded platforms/CPORequired15+ years of experience in embedded software/firmware architecture, design, and implementation
  • Deep expertise in coherent optical module firmware (400ZR, 800ZR, or equivalent) and associated standards (OIF-400ZR, C-CMIS, CMIS 4.x/5.x)
  • Experience with SoC-based embedded platforms (MCU/DSP-based architectures)
  • Proficiency in C/C++ firmware development and Python-based test/automation scripting
  • experience with lab bench bring-up, ATE integration, and field issue resolution
  • Experience with Jira, GitLab, and CI/CD-based firmware release flows
  • Familiarity with Marvell optical or coherent DSP platforms or equivalent
  • What You Can Expect

Compensation

  • California Pay Range

Company info

  • What We're Looking For
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This listing is sourced directly from Phizenix's careers page and normalized into a canonical job model.