Mechanical Engineer - AI Rack Scale Systems

About the role

MatX is building next-generation AI compute infrastructure for large-scale LLM training and inference. We are looking for a hands-on Mechanical Engineer to design, develop, and validate mechanical systems for our rack-scale AI platform from compute trays and rack enclosures to fully liquid-cooled infrastructure.

What You'll Do Here

• Develop AI compute trays, rack enclosures, and mechanical assemblies in accordance with OCP Rack specifications
• Produce 3D models and 2D drawings at the component, sub-assembly, and assembly levels, and maintain the mechanical BOM, drawing packages, and GD&T documentation throughout the NPI stages
• Design and integrate liquid cooling hardware including cold plates, manifolds, quick-disconnect fittings, and CDU-to-rack interfaces
• Support the mechanical integration of compute trays into rack systems across power, liquid cooling, cabling, and connector interfaces
• Carry out tolerance stack-up analysis at multiple levels, from package through rack, to confirm proper fit and straightforward assembly
• Take a hands-on role in EVT, DVT, and PVT prototype builds, bring-up, and debug
• Apply DFM/DFA principles and contribute to design reviews with JDM/ODM manufacturing partners

Who You Are

• 5+ years of mechanical engineering experience in server, data center, or AI compute hardware
• Experience designing rack-scale hardware — compute trays, rack enclosures, or server platforms
• Familiarity with OCP Open Rack standards
• Experience with liquid cooling systems — cold plates, manifolds, or CDU interfaces
• Proficiency in 3D CAD (SolidWorks or equivalent) and GD&T
• Familiarity with sheet metal, extrusion, casting, and machining manufacturing processes

Bonus Points

• Experience with high-power AI accelerator platforms
• Hands-on cold plate manufacturing experience
• Experience working with JDM/ODM partners
• Knowledge of liquid cooling reliability standards and leak testing methodologies

Compensation

The US base salary for this full-time position is determined based on a variety of factors including role, experience, location, job-related skills, and relevant education and training. Career length is only a guideline for compensation.

• Early Career – $160,000 – $275,000 + equity
• Mid Career – $175,000 – $400,000 + equity
• Senior Career – $250,000 – $600,000 + equity

What We Offer

• Time off: 4 weeks PTO (accrued) + 12 company Holidays + up to 3 weeks remote work
• Health: Company-subsidized Medical (Kaiser or Anthem) for employees & dependents, Guardian Dental and Vision insurances for employee & dependents, and life insurance (employee only), plus HSA and FSA offerings via Lively
• Financial Wellbeing: Choose from Roth IRA/401K (or both) retirement plans with up to 5% company contribution to 401K (even if you don't contribute). Also, 100% company-paid life insurance (up to $300K) and long-term disability insurances
• Professional Development: $1,500 Professional Development Budget (per year)
• Team Meals: MatX provides onsite team lunch & dinner Monday–Friday, with your choice of ordering via WeBox, Specialty’s or via our reimbursement system
• Commute on Us: Commute on our company Uber account, or reimburse your train rides. Either way, we pay 100% for your daily commute
• MatX E[x]tras: $50/month to use on the perk you value most
• Cell & Internet Reimbursement: $35/month for cellular and $40/month for Wi‑Fi
• Mental Wellbeing: 100% paid mental health benefit via SpringHealth and Guardian EAP
• Support to Parents: Up to 12 weeks paid parental leave regardless of path to parenthood, 10 weeks pregnancy disability leave, flexible return-to-work hours, and Benepass reproductive health & parental benefit
• AI Resources: Up to $20K/month plus a dedicated internal AI Tooling Team to support your productivity