Mechanical Engineer - SoC to Rack Integration

Majestic Labs • Los Altos, CA

5d

About The Position

Majestic Labs is a fast-moving, US-Israeli AI startup building next-generation infrastructure for the world’s most demanding AI workloads. Our mission is to accelerate the future of intelligence and make it ubiquitously accessible by delivering full stack custom AI servers optimized for large-scale inference and training. We are seeking a Principal Mechanical Engineer to lead the hardware definition of our next-generation AI infrastructure. This is a high-impact individual contributor role where you will serve as the primary technical authority for the physical architecture of advanced server platforms. You will bridge the critical gap between ultra-high-power silicon packaging, liquid-cooled node design, and massive-scale rack deployments.

Requirements

• B.S. or M.S. in Mechanical Engineering.
• 12+ years in design and validation (MDVT) of modular electromechanical chassis and rack level systems in data centers for HPC/AI/Enterprise segment.
• Proven track record of owning at least one full product lifecycle — from concept through high-volume manufacturing (HVM).
• Expert-level understanding of metal fabrication processes including milling, casting, and sheet metal, and how they impact thermal performance and structural integrity.
• Technical knowledge of fluid dynamics, wetted material compatibility, and the mechanical nuances of drip-free connector integration.
• Proficiency in FEA tools for structural and vibration analysis.
• Demonstrated ability to drive technical alignment across engineering teams.

Nice To Haves

• Direct experience with AI/GPU-based architectures and ultra-high-density power delivery systems.
• Deep familiarity with Open Compute Project (OCP) or ORV3 standards.
• Experience with blind-mate liquid and power interfaces.

Responsibilities

• Lead the end-to-end mechanical definition of server blades, high-density chassis, and rack-level enclosures.
• Architect the integration of sliding rails, blind-mate connectors, precision standoffs, and high-load extraction handles.
• Define mechanical paths for ultra-high-density power delivery busbars and complex cable management systems.
• Own mechanical integration of liquid cooling systems, providing design feedback on cold plate layouts, manifold distribution, and QD/leak-mitigation compatibility.
• Support hybrid air/liquid cooling solutions for 1kW+ nodes, collaborating with thermal specialists on CFD-informed design decisions.
• Optimize designs for high-volume manufacturing using precision milling, die casting, and complex sheet metal fabrication.
• Ensure system integrity against transportation shock and vibration and extreme thermal and humidity cycling.
• Implement Design for Cost (DfC) and Design for Assembly (DFA) principles to ensure seamless serviceability and global deployment readiness.

Benefits

• We seek smart, curious, self-driven individuals who enjoy creative problem-solving and continuous learning.
• Majestic Labs is an equal opportunity employer deeply committed to diversity of background and thought.
• If you are ready to dare greatly, learn from mistakes, engage in vigorous debates, and help create a step-function shift in human technical capability-we want to meet you!

What This Job Offers

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