ASIC Speed AMS Technical Leader

High Speed AMS Design Engineer

Cisco's Client Optics Group (COG) designs & delivers the high-speed optical transceivers, and platforms that power Cisco's core data center networking solutions. We specialize in the design and integration of innovative IM/DD optics and silicon photonic platforms that enable customers to deploy industry-leading optical technologies within data center with unprecedented speed, capacity, and reliability. Come join us and take part in shaping COG's ground-breaking optical solutions by designing, developing, and testing some of the most advanced pluggable, and Co-packaged Optics (CPO) being developed in the industry.

You will work with Cisco's best-in-class Silicon Photonics team. Our team is responsible for driving the development and optimization of optical transceivers & modules (800G,1.6T & beyond) that seamlessly integrate with Cisco's routing, switching, and datacenter platforms, enabling customers to build scalable, high-performance networks that support emerging technologies including AI/ML workloads, and next-generation data center architectures.

We are seeking an experienced High Speed AMS Design Engineer to lead full-chip electrical specifications and mixed-signal design for Cisco's silicon photonics driver integrated circuits supporting 100G/200G/400G per Lambda solutions. You will own high-speed datapath and low-speed control circuit design for receive and transmit paths in our next-generation silicon photonics modules.

Your Impact

• Provide technical leadership in analog/mixed-signal design for Cisco's next generation silicon photonics driver integrated circuits for 100G/200G/400G per Lambda solutions.
• Lead full-chip electrical specifications, circuit design, and verification test plans from concept through production, coordinating across electrical, optical, and product teams.
• Author mixed-signal datapath designs including photonics modulator drivers, serialize rs, PLLs, TIAs and control circuits while optimizing for power, performance, testability, and cost.
• Debug complex silicon and system-level issues during bring-up, and lab validation phases, driving yield enhancements and failure analysis.
• Mentor and guide analog, digital, and validation engineers while collaborating with architecture and product teams on verification and testability strategies.

Minimum Qualifications

• Bachelors + 12 years of related experience, or Masters + 8 years of related experience, or PhD + 5 years of high-speed AMS design experience
• Demonstrated expertise in high-speed optical transceiver design (modulator drivers, TIA, CDR, PLLs, ADC/DAC) and proficiency with industry standard tools (Cadence Virtuoso, Spectre, Caliber, System Verilog, Verilog-AMS)
• Demonstrated ability to lead design teams through full tapeout cycle, making critical decisions with limited data and delivering successful silicon products
• Proficiency in Python or C for design automation, scripting, and analytical tools

Preferred Qualifications

• 10-15 years of analog/mixed signal circuit design experience
• Experience with silicon photonics driver ICs and direct-detect optical module architectures
• Strong understanding of silicon photonics, optical subsystems, MSA standards (QSFP/QSFP-DD), and IEEE 802.3 specifications
• Expertise in multiple high-speed PHYs, protocols and subsystems (Ser Des 112
  
  Gbps/224
  
  Gbps PAM4, Ethernet, UCIE, clock and data recovery systems, PLLs, ADC/DAC circuits)
• Demonstrated experience in design for testability (DFT) and test methodology development for large mixed-signal designs
• Proven experience with lab instrumentation (digital communication analyzers, real-time scopes, BERTs), SI/PI and test fixture/PCB
• Familiarity with optical sub-component models (photodiodes, modulators) and Verilog-A modeling for AMS simulations
• Strong collaborator and teammate with the ability to work across teams in multiple sites