Senior Optical Test Engineer

Mixx Technologies is building next-generation optical interconnect solutions that enable true system-level integration for hyperscale data centers. We combine expertise in silicon photonics, packaging, fiber connectivity and system integration to deliver products that set new standards for performance, density, and scalability to drive the next generation of artificial intelligence.

We are seeking a highly skilled Optical Test Engineer to join our team in developing cutting-edge silicon photonics and optical interconnect designs. In this role, you will be responsible for the hands-on validation of high-density optical systems, requiring extreme precision in micron and sub-micron scaled alignment. You will bridge the gap between design and reality by building automated test environments and designing custom fixtures to ensure our next-generation AI infrastructure meets the highest performance standards

• Execute hands-on laboratory testing for optical components and systems with a focus on micron and sub-micron scaled alignment requirements.
• Design and develop custom fixturing and mechanical supports for new, complex test setups to ensure stability and repeatability.
• Develop automation scripts (e.g. Python) to control laboratory equipment, automate data collection, and streamline testing workflows.
• Collaborate with cross-functional teams, including packaging and electrical engineers, to validate optical performance in operational conditions.
• Analyze and present test data, correlating experimental results with design simulations to drive iterative improvements.
• Maintain and calibrate high-precision optical test equipment, including light sources, power meters, and alignment stages.

• B.S. or M.S. in Optical Engineering, Physics, Mechanical Engineering, or a related technical discipline.
• 5+ years of relevant experience in an optical laboratory environment, specifically dealing with precision alignment and fiber connectivity.
• Proven ability to design test fixtures and hardware setups for advanced optical characterization.
• Strong programming skills for test automation and data analysis (e.g., Python).
• Deep understanding of optical physics, including coupling efficiency, polarization, and loss mechanisms in silicon photonics or fiber systems.
• Experience in a fast-paced R&D environment, with the ability to manage multiple priorities and deliver high-quality data.

• Proficiency in Zemax Optic Studio for optical design, modeling, and stray light analysis.
• Familiarity with silicon photonics and 2.5D/3D packaging architectures.
• Experience with optical-thermal interactions or electro-optical co-simulation.
• Excellent communication skills, with the ability to translate complex experimental findings into actionable design recommendations.

At Mixx Technologies, you’ll be part of a fast-moving team rethinking what’s possible in AI infrastructure. We offer a collaborative culture, deep technical challenges, and the opportunity to shape the mechanics behind the world’s most advanced computing systems