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DSP Engineer

Lumilens - San Jose, CA, USA - In-office - posted 2026-08-31

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Lumilens is building photonics infrastructure for AI supercomputing, including chip-to-chip optical interconnects and scalable photonic engines. The company is Series B-funded and led by industry veterans. As a DSP Engineer, you will serve as a subject matter expert for high-speed serial data measurements, combining advanced digital signal processing expertise with hands-on hardware design knowledge. Your work will advance Lumilens' measurement capabilities for ultra-high-speed serial data systems supporting AI infrastructure applications. Key responsibilities include: - Developing and refining advanced measurement techniques and algorithms for ultra-high-speed optical and electrical signaling systems - Improving TECQ/TDECQ measurement accuracy and related algorithms to support more precise and reliable results - Supporting advanced measurement work aligned with IEEE 802.3 standards and Lumilens' strategic technical priorities - Contributing to Functional Receiver measurement work - Researching, designing, and developing tools for ultra-high-speed serial data applications in AI infrastructure - Driving hardware improvements that reduce timebase jitter toward 100 fs, improving upon current architectures above 250 fs Required qualifications include strong expertise in digital signal processing for high-speed serial data measurements, hands-on hardware design experience for high-speed measurement systems or related photonics/electrical test platforms, demonstrated experience with advanced measurement algorithms and signal integrity analysis, familiarity with IEEE 802.3 measurement methodologies, and strong communication skills. Preferred qualifications include experience with TECQ/TDECQ measurements, equalization, and waveform processing; background in optical communications, high-speed SerDes, or photonics; experience developing measurement automation tools and custom instrumentation; and an advanced degree in Electrical Engineering, Photonics, or Applied Physics.

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