Job Description

Thermal Engineer

About Lumilens

At Lumilens, we are building the critical photonics infrastructure that powers tomorrow’s AI supercomputing. From chip-to-chip optical interconnects to scalable photonic engines, Lumilens is unlocking a new era of computing—faster, cooler, and massively more efficient. Join our collaborative team to help shape the future of high-speed optical connectivity.

As a Thermal Engineer at Lumilens, you will play a key support role in developing and optimizing thermal management solutions for advanced optical interconnect products used in data center and AI infrastructure equipment, including pluggable optics, near-packaged optics, and co-packaged optics. You will work closely with senior engineers to contribute to the design, analysis, and validation of thermal solutions for high-density optoelectronic systems, ensuring product reliability and performance.

Responsibilities

• Assist in the thermal design of pluggable optics, near-packaged optics, and co-packaged optics for data center switching, compute, and interconnect equipment.

• Support the development of air-cooled and liquid-cooled thermal solutions for high-power optical and optoelectronic assemblies, such as heatsinks, thermal bridges, cold plates, coolant interfaces, and platform-level heat rejection paths.

• Contribute to thermal analysis of interactions among ASICs, DSPs, optical engines, lasers, packages, and surrounding mechanical structures in dense data center deployments.

• Collaborate with system architects and senior engineers to help define thermal requirements for data center equipment at rack-level, chassis-level, and module-level, under both air and liquid cooling conditions.

• Apply working knowledge of liquid-cooling technologies used in data center systems, including cold plates, manifolded liquid loops, coolant distribution concepts, and thermal interfaces.

• Assist in evaluating tradeoffs between air cooling and liquid cooling for power-dense electronics and optoelectronic assemblies.

• Gain familiarity with the thermal challenges unique to near-packaged and co-packaged optics, such as proximity to hot ASICs, optical temperature sensitivity, thermal isolation, and serviceability constraints.

Why Join Lumilens?

• Work at the forefront of next-generation AI and data center technology

• Collaborative and innovative environment

• Opportunities for rapid career growth

• Competitive salary and comprehensive benefits

Lumilens is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, or any other protected characteristic.