Principal Firmware Engineer

What You'll DoOwn 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.

Contribute to firmware architecture decisions across the broader optics firmware platform, including shared infrastructure, tooling, and release processes

Mentor and guide other engineers on the team; serve as a technical resource and subject matter exper

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What We're Looking Fo

• r:Senior Principal Engineer, Software/Firmware - coherent optical module firmware/SoC-based embedded platforms/CPORequired15+ years of experience in embedded software/firmware architecture, design, and implementati
• onDeep expertise in coherent optical module firmware (400ZR, 800ZR, or equivalent) and associated standards (OIF-400ZR, C-CMIS, CMIS 4.x/5.
• x)Strong background in bootloader design, firmware upgrade mechanisms (including hitless/in-service upgrade), and flash manageme
• ntExperience with SoC-based embedded platforms (MCU/DSP-based architecture
• s)Proficiency in C/C++ firmware development and Python-based test/automation scripti
• ngDemonstrated ability to own and deliver programs end-to-end — from alpha bring-up through GA release and production suppo
• rtStrong debugging skills across hardware/firmware boundaries; experience with lab bench bring-up, ATE integration, and field issue resoluti
• onExperience with Jira, GitLab, and CI/CD-based firmware release flo
• wsExcellent communication skills; able to work effectively with customers, hardware engineers, and DSP tea
• msPreferredPrior experience at an optical module company or optical semiconductor compa
• nyFamiliarity with Marvell optical or coherent DSP platforms or equivale
• ntBackground in calibration and control algorithms for optical components (EDFA, MZ, TOSA, etc