Electro-optical Signal Integrity, Principal Engineer
On-siteAdliswil, Zurich, Switzerland
Job Summary
Define, simulate, and drive the architecture of high-frequency electrical interfaces for next-generation optical engines, including 400G/lane CPO. Lead signal integrity strategy across electrical and electro-optical interfaces to influence architecture, packaging, and system definition. Drive co-design across photonics, analog/ASIC design, and packaging teams to optimize performance, power efficiency, and signal integrity. Lead testing, characterization, and qualification of components and integrated systems while developing and validating end-to-end link budgets. Analyze measurement data to identify performance limitations and lead root cause analysis of complex signal integrity issues. Master's degree or PhD in Electrical Engineering, Photonics, or a related field with 5+ years of industry experience required. Located in Zurich.
Required Qualifications
- Master's degree or PhD in Electrical Engineering, Photonics, or a related field
- 5+ years of industry experience in a high-tech engineering environment
- Strong understanding of RF/microwave engineering, signal integrity, high-frequency circuit theory, interconnects, silicon photonics, and semiconductor packaging
- Strong background in optical communications (coherent and/or IM/DD) or high-frequency electrical/electro-optical characterization (>110 GHz)
- Hands-on experience in electro-optical device testing (e.g., modulators, photodetectors, lasers); high-speed testing preferred
- In-depth experience in two or more of the following: 3D EM modeling and simulation (HFSS preferred), high-frequency circuit simulation (ADS preferred), and/or RF PCB design
- High-frequency characterization and data modulation (VNA, AWG, PPG, oscilloscope, DCA, BERT)
- Python or MATLAB for lab automation, data analysis, or system simulation
- High-speed link modeling, channel budgets, and equalization techniques (FFE, DFE, CTLE), including metrics such as BER, SNR, OMA, TDECQ, and eye diagrams
- Interfacing with high-speed SerDes (≥200G PAM4, ideally 400G PAM4) and familiarity with industry standards (IEEE 802.3, OIF CEI)
- Advanced packaging and/or 2.5D/3D integration in optical platforms
- Strong ownership mindset with the ability to operate autonomously in a fast-paced environment
- Collaborative approach with the ability to influence cross-functional teams and drive technical alignment
- Excellent communication skills, with the ability to explain complex topics clearly to diverse audiences
- Proven track record of delivering high-quality results in ambiguous or evolving environments
- Eligible to access export-controlled information as defined under applicable law
Desired Qualifications
- Experience with 400G/lane CPO and beyond
- Experience with coherent optical communications
- Experience with IM/DD optical communications
- Experience with high-speed testing
- Experience with 3D EM modeling and simulation (HFSS)
- Experience with high-frequency circuit simulation (ADS)
- Experience with RF PCB design
- Experience with VNA
- Experience with AWG
- Experience with PPG
- Experience with oscilloscope
- Experience with DCA
- Experience with BERT
- Experience with Python for lab automation, data analysis, or system simulation
- Experience with MATLAB for lab automation, data analysis, or system simulation
- Experience with high-speed link modeling
- Experience with channel budgets
- Experience with equalization techniques (FFE, DFE, CTLE)
- Experience with metrics such as BER, SNR, OMA, TDECQ, and eye diagrams
- Experience with SerDes (≥200G PAM4)
- Experience with SerDes (400G PAM4)
- Familiarity with IEEE 802.3
- Familiarity with OIF CEI
- Experience with advanced packaging
- Experience with 2.5D/3D integration in optical platforms
- Ability to operate autonomously in a fast-paced environment
- Ability to influence cross-functional teams and drive technical alignment
- Ability to explain complex topics clearly to diverse audiences
- Track record of delivering high-quality results in ambiguous or evolving environments
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