Mechanical Design Engineer - Package

Mixx Technologies • San Jose, CA

83d

About The Position

Mixx Technologies is seeking a highly skilled Mechanical Engineer to design, analyze, and validate precision components and assemblies for advanced photonics and packaging solutions. The role focuses on translating engineering requirements into manufacturable designs with micrometer-level accuracy for 2.5D/3D advanced packaging. The successful candidate will bring a strong foundation in mechanical design, finite element analysis (FEA), and tolerance analysis, and be motivated to learn and grow in new areas.

The position is part of a multidisciplinary team developing optical interconnect solutions for hyperscale data centers. It involves close collaboration across optical, electrical, packaging, testing, and manufacturing teams, as well as with vendors and manufacturers. The engineer will also support prototype builds, testing, and failure analysis to improve designs.

Requirements

• Bachelor’s or Master’s degree in Mechanical Engineering or a related field.
• 7+ years of experience in precision mechanical design.
• Product experience with 2.5D/3D advanced packaging.
• Strong expertise with FEA tools such as ANSYS or COMSOL.
• Deep knowledge of micrometer-level tolerances and tolerance stack-up analysis.
• Proficiency in GD&T and ASME Y14.5 standards.
• Hands-on experience with 3D CAD software such as SolidWorks or equivalent.
• Excellent problem-solving skills and ability to work in a fast-paced, collaborative environment.

Nice To Haves

• Experience in optical, semiconductor, photonics, or related industries.
• Experience in photonics packaging, semiconductor equipment, or precision optomechanical systems.
• Knowledge of materials science, including thermal expansion, stress, and fatigue.
• Familiarity with high-volume manufacturing processes and Design for Manufacturability (DFM).

Responsibilities

• Design and develop precision mechanical components and assemblies for advanced optical and electronic systems integrated into 2.5D/3D advanced packaging.
• Perform structural, thermal, and vibration analysis using FEA tools to validate designs under real-world conditions.
• Apply GD&T principles to ensure manufacturability, alignment, and performance at the micron scale.
• Develop and review detailed drawings, CAD models, and tolerance stacks.
• Collaborate with optical, electrical, packaging, testing, and manufacturing teams to integrate mechanical designs into complex systems.
• Partner with vendors and manufacturers to ensure designs meet quality and cost targets.
• Support prototype builds, testing, and failure analysis to drive design improvements.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior