Senior Mechanical Engineer - Test Infrastructure (Nuclear Fusion)

Location: San Leandro, CA, United States

Salary: $138,100–$263,800 USD per year

Company

hirify.global is developing pulser-driven inertial fusion systems and components intended to provide abundant, affordable, clean energy.

What you will do

• Lead end-to-end mechanical design, 3D CAD modeling, and detail engineering for complex high-performance components and assemblies.
• Perform hand calculations, first-principles design, finite element analysis, and structural and thermal assessments.
• Translate physics requirements, spatial constraints, and boundary conditions into engineering models and hardware specifications.
• Conduct tolerance stack-up analyses and assess part variances against strict design interface requirements.
• Apply DFM and DFA principles to optimize performance, weight, cost, and lead times.
• Collaborate with physics, systems engineering, system integration, and manufacturing teams to resolve trade-offs and mitigate technical risk.

Requirements

• Bachelor’s degree in Mechanical Engineering.
• 5+ years of hands-on experience in mechanical design and structural or thermal analysis for complex hardware systems.
• Advanced proficiency with 3D CAD software such as Creo or SolidWorks.
• Practical experience with FEA software such as ANSYS, Abaqus, or Creo Simulate, including stress, fatigue, thermal, and structural-integrity evaluation.
• Strong knowledge of GD&T under ASME Y14.5, tolerance stack-up analysis, material selection, and advanced manufacturing techniques.
• Strong engineering fundamentals, problem-solving ability, and written and verbal communication skills with experience in cross-functional technical leadership.

Nice to have

• Master’s degree or PhD in Mechanical Engineering.

Culture & Benefits

• Equity plan.
• 6% employer 401(k) matching.
• Paid time off, including sick leave, vacation, and paid family leave.
• Medical, dental, and vision insurance.
• Diverse and equal-opportunity work environment.