Senior Composites Mechanical Engineer

Joby Aviation•Santa Cruz, CA

10d•$104,800 - $181,000

About The Position

The Hydrogen Storage team is seeking a highly capable, hands-on Mechanical Engineer to support the development of cryogenic liquid hydrogen storage systems. This is a core individual contributor position for an engineer who enjoys working at the intersection of system-level requirements and detailed mechanical design, and who is motivated to take true ownership of critical hardware. This role will have primary ownership of the vacuum shell for the cryogenic tank system, including structural design, thermal considerations, sealing strategy, test planning, engineering decision-making, drawing release, and overall project execution. The ideal candidate is a strong mechanical generalist with experience or interest in cryogenic systems and a demonstrated ability to optimize solutions at the system level through thoughtful, detail-level engineering execution. You are comfortable moving between first-principles thinking, hand calculations, CAD design, supplier interaction, and hands-on hardware development in a fast-paced aerospace environment. We are looking for an engaged, creative, and fundamentally solid mechanical engineer with excellent cultural fit for a highly collaborative, design-build-test team.

Requirements

Bachelor’s or Master’s degree in Mechanical Engineering, Aerospace Engineering, or a related field.
3 to 7 years of mechanical engineering experience in aerospace, energy, cryogenics, or other high-performance hardware environments.
Strong fundamentals in solid mechanics, heat transfer, and materials behavior.
Demonstrated ability to perform first-principles hand calculations and use basic FEA or thermal analysis tools.
Experience with 3D CAD and engineering drawing creation and release.
Familiarity with precision machining, fabrication processes, and tolerance stack-ups.
Working knowledge of composite structures and materials, with willingness to learn composite layup definition and drawing practices as applied to 3DX environments.
Excellent problem-solving skills and comfort working in an iterative hardware development environment.
Strong communication skills and ability to collaborate across disciplines.

Nice To Haves

Experience with cryogenic systems or liquid hydrogen applications.
Exposure to vacuum systems or vacuum-insulated structures.
Experience with high-performance seals and leak-tight assemblies.
Familiarity with cryogenic-compatible materials and thermal contraction considerations.
Experience supporting hardware testing and development builds in a fast-paced, hands-on environment.

Responsibilities

Own the design and development of the cryogenic tank vacuum shell, including structural layout, interfaces, sealing features, and manufacturability considerations.
Develop and execute test plans to validate vacuum shell performance, including structural, thermal, and leak-tightness verification.
Take responsibility for engineering decisions, trade studies, and documentation associated with the vacuum shell and related hardware.
Generate and release detailed CAD models, drawings, and configuration-controlled documentation.
Translate system-level performance, mass, thermal, and safety requirements into robust mechanical designs.
Perform hand calculations and simple simulations to evaluate strength, stiffness, modal behavior, buckling, and thermal expansion.
Support material selection for cryogenic applications, including evaluation of high-performance alloys, composites, and sealing materials.
Contribute broadly to other mechanical design efforts across the hydrogen storage system as part of the design-build-test cycle.
Engage directly in hardware builds, troubleshooting, and development testing, rolling up sleeves to help get hardware designed, built, and tested.
Collaborate cross-functionally with structures, thermal, propulsion, manufacturing, and test teams to deliver integrated solutions.