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Photonics Systems Test Engineer

Santa Clara, CA

About Celestial AI

As Generative AI continues to advance, the performance drivers for data center infrastructure are shifting from systems-on-chip (SOCs) to systems of chips. In the era of Accelerated Computing, data center bottlenecks are no longer limited to compute performance, but rather the system’s interconnect bandwidth, memory bandwidth, and memory capacity. Celestial AI’s Photonic Fabric™ is the next-generation interconnect technology that delivers a tenfold increase in performance and energy efficiency compared to competing solutions.

The Photonic Fabric™ is available to our customers in multiple technology offerings, including optical interface chiplets, optical interposers, and Optical Multi-chip Interconnect Bridges (OMIB). This allows customers to easily incorporate high bandwidth, low power, and low latency optical interfaces into their AI accelerators and GPUs. The technology is fully compatible with both protocol and physical layers, including standard 2.5D packaging processes. This seamless integration enables XPUs to utilize optical interconnects for both compute-to-compute and compute-to-memory fabrics, achieving bandwidths in the tens of terabits per second with nanosecond latencies.

This innovation empowers hyperscalers to enhance the efficiency and cost-effectiveness of AI processing by optimizing the XPUs required for training and inference, while significantly reducing the TCO2 impact. To bolster customer collaborations, Celestial AI is developing a Photonic Fabric ecosystem consisting of tier-1 partnerships that include custom silicon/ASIC design, system integrators, HBM memory, assembly, and packaging suppliers.

ABOUT THE ROLE

We are seeking an experienced Photonics test engineer that can lead system bring-up, validation and DVT testing for the optics used in Celestial’s cutting-edge scale-up network product offerings. This is a cross-functional role, with strong collaboration with the ASIC, AMS, Firmware and Packaging teams to deliver state of the art test and characterization solutions.

ESSENTIAL DUTIES AND RESPONSIBILITIES

  • Own the Photonics test and characterization of high-speed optical networking products and sub-systems that are ushering in the next generation of AI XPU connectivity and are built on the most advanced PICs in the industry.
  • Work cross-functionally across the organization to demonstrate, validate and troubleshoot key building blocks of Celestial’s groundbreaking Photonic FabricTM technology and support new product introduction (NPI) from R&D through to manufacturing test.
  • Collaborate with ASIC & AMS design and packaging teams to improve device performance and test coverage.
  • Also contribute significantly to wafer-scale testing of Photonics library elements and sub-systems.

QUALIFICATIONS

  • Specialized skills
    • Strong experience designing and executing test plans for datacom optical transceivers, photonic integrated circuits (PICs) & optoelectronic subassemblies, with the ability to analyze and understand the resulting data.
    • Strong experience performing high-speed (56Gbps+/lane) optical and electrical measurements including Bit Error Rate (BER) testing, eye-diagram analysis and link control loop testing.
    • Strong familiarity with basics of optical characterization, including spectral testing and insertion & return loss measurements.
    • Strong experience with data analysis tools (JMP, DataConductor or similar)
    • Ability to automate test setups using standard scripting languages (Python preferred) and to integrate standard instruments (oscilloscopes, BERTs, AWGs, tunable lasers, optical spectrum analyzers etc).
    • Familiarity with Analog and Photonics device and circuit design principles is a big plus.
  • Education requirements
    • Minimum MS in engineering or physics. PhD is preferred.
  • Experience requirements
    • Minimum 5 years of relevant experience
  • Attributes
    • Self-starter
    • Thrives in a highly collaborative and dynamic work environment
    • Has excellent oral and written communication skills
    • Creativity in problem-solving with strong attention to detail

 

 

LOCATION: Santa Clara, CA

 

For California Location:

As an early stage start up, we offer an extremely attractive total compensation package inclusive of competitive base salary, bonus and a generous grant of our valuable early-stage equity. The target base salary for this role is approximately $185,000.00 - $225,000.00. The base salary offered may be slightly higher or lower than the target base salary, based on the final scope as determined by the depth of the experience and skills demonstrated by candidate in the interviews.

We offer great benefits (health, vision, dental and life insurance), collaborative and continuous learning work environment, where you will get a chance to work with smart and dedicated people engaged in developing the next generation architecture for high performance computing.

Celestial AI Inc. is proud to be an equal opportunity workplace and is an affirmative action employer.

 

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