Embedded Software Engineer

Your Job

We're seeking an experienced Systems Integration Engineer (SIE) to lead embedded firmware integration and interoperability efforts for Active Copper Cable (ACC) and Active Electrical Cable (AEC) products used in high-speed networking systems.

This role focuses on firmware embedded within cable modules, enabling reliable link bring-up, management, and interoperability across multiple networking protocols and platforms.

In this role, you'll act as a technical authority for firmware supporting CMIS-managed active cables, working at the intersection of the OSI Physical (Layer 1) and Data Link (Layer 2).

You'll collaborate closely with hardware validation, signal integrity, and networking teams to ensure robust interoperability with systems using Ethernet, PCIe, and InfiniBand.

This position is ideal for an embedded software engineer with a strong background in network devices, protocol behavior, and system-level integration, who enjoys solving cross-layer interoperability challenges.

Our Team

Molex's Copper Solutions Business Unit (CSBU) is a global team that works together to deliver exceptional products to worldwide telecommunication and data center customers.

CSBU is one of the most highly technically advanced business units within Molex.

Our engineering teams are designing cutting edge solutions for high-speed, high-density products that maximize speed, signal integrity, and efficiency.

Why Join Us?

You will play a critical role in defining how embedded firmware enables interoperability for ACC and AEC products across diverse networking platforms.

This role offers deep technical ownership, hands-on system-level exposure, and the opportunity to influence how active cable firmware behaves across Layer 1 and Layer 2 boundaries.

You will work at the intersection of embedded software, hardware, and networking protocols, helping ensure reliable, scalable interoperability in lab and customer deployments .

What You Will Do

Embedded Firmware Integration


* Trouble shoot bring-up and integration of embedded firmware within ACC/AEC cable modules


* Develop and integrate firmware running on DSPs, retimers, equalizers, and embedded controllers


* Implement and support CMIS-based management, configuration, and telemetry for active cables


* Validate firmware behavior across power-up, reset, link training, and runtime operation

Protocol & OSI Layer Interoperability


* Debug issues spanning OSI Layer 1 (physical signaling, training, recovery) and
OSI Layer 2 (link initialization, framing dependencies, error conditions)


* Analyze firmware behavior during system-level link bring-up and interoperability testing

Debug, Root-Cause, & Qualification Support


* Lead firmware-centric root-cause analysis for qualification and interoperability failures


* Debug interactions between firmware, hardware, signal integrity, and link-level protocol behavior


* Instrument firmware to improve observability, diagno...