Optical Test Engineer

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 Optical Test Engineer, based in our Singapore office, to operate and maintain wafer-scale probe stations for silicon photonics testing. In this role, you will execute and refine optical and opto-electronic test procedures, ensure reliable data collection across passive and active components, and work closely with the engineering team in the US to support development and production testing. This position is ideal for an engineer who excels in precision measurement, data analysis, and continuous improvement of test systems.

ESSENTIAL DUTIES AND RESPONSIBILITIES

• Own the operation and maintenance of wafer-scale probe stations for Silicon Photonics testing.
• Develop and execute test recipes for various passive and active optical/opto-electronic components for library development and production sort.
• Work with prober vendor to implement new test functionality as needed, including incorporation of new test equipment into prober.
• Create and execute a maintenance and continuous improvement plan for the test stations to improve test capabilities and gauge.
• Help setup data infrastructure to handle data outputs from prober.

QUALIFICATIONS

• Specialized skills
• Good understanding of integrated optics testing requirements and methods.
• Experience with setting up optical measurements, including familiarity with standard test equipment/components (tunable lasers, PWMs, OSAs, fiber arrays). Direct experience with commercial probe stations is a huge plus.
• Experience with high-speed test setups to measure opto-electronic S-parameters
• Ability to collect and analyze complex datasets (i.e. experience with JMP, DataConductor or similar data analysis tools)

• Experience with automated instrument/machine control using Python/Matlab/LabView/C#

• Education requirements

• Minimum BS in engineering or physics. Masters 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: Singapore*

• This role will be based in our Singapore office, offering an exciting opportunity to work in one of Asia's most dynamic business hubs.

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.