Senior Principal Engineer

Company : Hr Recruiting Services

Job Description - Senior Principal Engineer

We are seeking a Senior Principal Firmware Engineer (coherent optical module firmware/SoC -based embedded platforms/CPO) to join our clients Optical Connectivity firmware team in Santa Clara. This pivotal individual contributor role involves end -to -end ownership of firmware development for next -generation coherent optical modules, including 400ZR, 400ZR+, and 800ZR platforms. The ideal candidate will bring deep technical expertise in embedded firmware for optical transceivers, a proven track record in leading multi -generation programs, and the ability to drive innovation across firmware, hardware, DSP, and customer -facing teams. You will shape firmware architecture, lead complex system bring -up and validation, and ensure robust, scalable solutions that meet the stringent demands of hyperscalers and global carriers. This role is critical to advancing our leadership in coherent optics and CPO -based embedded platforms.

Responsibilities:

Lead firmware development lifecycle for coherent optical module programs—from architecture and alpha bring -up through production release and long -term support
Design and implement advanced firmware capabilities including hitless firmware upgrades, CMIS compliance (CMIS 4.x/5.x), secure bootloader architecture, calibration and control engines, and hardware abstraction layers
Own program -level milestones including system bring -up, calibration, validation, and customer delivery across multiple product generations
Collaborate cross -functionally with DSP, hardware, ATE, and test engineering teams to resolve complex system -level issues and ensure seamless integration
Engage directly with customers to address technical inquiries, debug field issues, and deliver firmware solutions aligned with hyperscaler and carrier requirements
Contribute to long -term firmware platform strategy, including shared infrastructure, tooling, automation, and CI/CD -based release processes
Mentor junior and mid -level engineers, serve as a technical authority, and drive best practices across the firmware organization

Requirements

Requirements:

Fifteen 15+ years of experience in embedded software/firmware architecture, design, and implementation for high -performance optical transceivers
Deep expertise in coherent optical module firmware (400ZR, 800ZR, or equivalent) and compliance with industry standards (OIF -400ZR, C -CMIS, CMIS 4.x/5.x)
Proven experience with SoC -based embedded platforms (MCU/DSP architectures) and firmware development in C/C++
Strong background in bootloader design, flash management, and secure, hitless firmware upgrade mechanisms
Proficiency in Python for test automation, scripting, and tooling development
Demonstrated success in owning and delivering complex firmware programs from early bring -up to GA and production support
Advanced debugging skills across hardware -firmware boundaries, including lab bench validation, ATE integration, and field issue resolution
Experience with Jira, GitLab, and CI/CD pipelines for firmware development and release management
Excellent communication and collaboration skills, with ability to interface effectively with technical and non -technical stakeholders across global teams

Preferred:

Prior experience at an optical module or optical semiconductor company
Familiarity with coherent DSP platforms or equivalent
Background in calibration and control algorithms for optical components (e.g., EDFA, MZ modulators, TOSA)

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Senior Principal Engineer

Job Description - Senior Principal Engineer

Requirements

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