Mechanical Design Engineer (Fusion Energy)

Location: Fremont, California, United States

Salary: $138,100–$207,100 USD annually, plus equity and benefits.

Company

hirify.global develops pulser-driven inertial fusion systems and components intended to deliver abundant, affordable, clean energy.

What you will do

• Design and analyze large vacuum seals for water-to-air, air-to-high-vacuum, and water-to-high-vacuum transitions.
• Lead experimental design, testing, and risk-reduction activities with internal teams, suppliers, and academic partners.
• Research novel sealing techniques and define, execute, and evaluate test campaigns.
• Perform FMEA and tolerance stack-up analyses to improve seal reliability and system safety.
• Present technical work, support system-level integration, and provide subject-matter expertise on sealing strategies.
• Document sealing processes and validation data, mentor junior engineers, and coordinate component purchasing with suppliers.

Requirements

• Bachelor’s or master’s degree in mechanical engineering, aerospace engineering, or a related field, or equivalent experience.
• 5+ years of mechanical design experience focused on vacuum seals and systems.
• Experience with rough, high, and ultra-high vacuum environments.
• Strong proficiency in CAD, FEM, and engineering analysis tools.
• Expertise in tolerance analysis, FMEA, seal design, and mechanical integration.

Nice to have

• Experience designing and assembling high-vacuum systems.
• Experience using Creo.
• Experience with high-voltage electrical work.
• Experience implementing instrumentation, controls, and software.

Culture & Benefits

• Equity plan.
• 6% employer 401(k) matching.
• Paid sick leave, vacation, and family leave.
• Medical, dental, and vision insurance.
• Multidisciplinary work across the fusion, hard-tech, scientific, and operational fields.