Senior Mechanical Engineer

About the Company

Endurance is building the world's first modular subsea geothermal power plants, converting vast thermal resources under the ocean into gigawatts of baseload power. Backed by top-tier venture capital, our founding team includes veterans from SpaceX, Helion, and Robinhood.

Responsibilities

• Architect and design critical mechanical systems from concept through offshore deployment
• Perform first-principles analysis of loads, thermal behavior, sealing strategies, and failure modes
• Design pressure-tolerant hardware, structural systems, and thermal interfaces for subsea environments
• Develop robust sealing and corrosion mitigation strategies for long-duration saltwater exposure
• Create detailed 3D CAD models, drawings, and tolerance stacks for complex hardware
• Build and test prototypes to validate mechanical performance and uncover failure modes
• Design and execute qualification tests including pressure testing, fatigue testing, and thermal cycling
• Investigate hardware failures and implement permanent design improvements
• Collaborate with electrical, drilling, and subsea systems teams to ensure clean system integration
• Participate in sea trials and field deployments to validate hardware performance

Requirements

• 6+ years designing and delivering complex mechanical systems in demanding environments
• Demonstrated ownership of hardware from early concept through testing and deployment
• Strong first-principles understanding of mechanics, materials, thermal systems, and failure modes
• Deep proficiency in 3D CAD and mechanical design of complex assemblies
• Experience designing hardware for harsh environments (subsea, aerospace, automotive, energy, or robotics)
• Proven ability to debug mechanical failures through testing and root-cause analysis
• Comfort working hands-on with hardware in a lab or shop environment

Benefits

• Competitive salary ($150k-$250k) and equity packages
• Global fieldwork at deployment sites like Hawaii, Iceland, Japan, and the Azores
• Vision, Dental, and Health insurance coverage
• Company-sponsored recreational dive certification