High Speed AMS Design Engineer

Cisco · Bangalore, India Cisco’s Silicon One Optics Group (S1O) designs and delivers high-speed optical transceivers and platforms that power Cisco's core data center networking solutions. We seek 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. 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, serializers, 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, SystemVerilog, Verilog-AMS). Proven 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 hands-on 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 (SerDes 112Gbps/224Gbps 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. Hands-on 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, team player with the ability to work across teams in multiple sites.