ASIC Speed AMS Technical Leader

High Speed AMS Design Engineer

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.

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 designing and integrating innovative IM/DD optics and silicon photonic platforms that enable customers to deploy industry-leading optical technologies within data centers with unprecedented speed, capacity, and reliability. Join us to shape COG’s groundbreaking optical solutions by designing, developing, and testing advanced pluggable and Co-packaged Optics (CPO) devices.

• 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.

• 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.

• 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.