Engineer, Firmware

Job Title

Engineer, Firmware

Role Summary

Develop embedded firmware for optical modules (e.g., QSFP-DD, OSFP, CFP) and supporting software tools. Work within a cross-functional engineering team to verify, validate, and maintain firmware that meets performance and reliability specifications.

Collaborate with hardware, optics, and test teams to diagnose field issues and support product lifecycle activities, including version control and firmware upgrades. We are an equal opportunity employer.

Experience Level

Entry-level — minimum 2 years of hands-on embedded firmware development experience.

Responsibilities

Primary duties for this role include firmware development, tool creation, and cross-team support.

• Design and implement embedded firmware for optical module platforms (QSFP-DD, OSFP, CFP).
• Develop software tools, test scripts, and GUIs to support debugging, validation, and lab testing.
• Support firmware verification, validation, troubleshooting, and RMA analysis of field issues.
• Maintain and improve firmware codebase: documentation, version control, and upgrade management.
• Work closely with hardware, optics, and test engineering to meet product specifications and reliability targets.

Requirements

Required skills and experience followed by desirable additions.

• Minimum 2 years of embedded firmware development experience.
• Strong proficiency in C for MCU and embedded systems.
• Experience with Git or similar version control systems.
• Familiarity with at least two embedded development toolchains (examples: SEGGER, IAR, Keil, CrossWorks, GCC).
• Solid understanding of communication interfaces such as I²C, SPI, and MDIO.
• Experience using Python or C# for tools, GUIs, or test automation.
• Good English reading and writing ability for technical documentation and datasheets.
• Effective communication and teamwork skills for cross-functional collaboration.

Nice-to-have:

• Assembly language programming experience.
• Basic circuit design and PCB layout knowledge.
• Closed-loop control algorithm development experience.
• Familiarity with RTOS or multi-threaded firmware architectures.
• Familiarity with optical communication standards (e.g., CMIS 3.0–5.x, SFF-8636) and module specifications (CFP, QSFP, OSFP).
• Understanding of coherent and PAM4 optical modules.

Education Requirements

Bachelor's or Master's degree in Electrical Engineering, Computer Engineering, Automation, Telecommunications, or a related technical field.

About the Company

Company: Cloud Light Technology

Headquarters: Hong Kong, China

Hong Kong–based engineering company focused on optical communication modules and related firmware, hardware, and test solutions. Works on embedded firmware for transceivers and supports product verification, validation, and field troubleshooting.