Senior Mechanical Systems Engineer, Fluid & Structural

Reaxiomatic; San Diego (CA); On-site; USD 150,000 - 190,000; Full time

Job summary

Reaxiomatic seeks a Staff Mechanical Systems Engineer to own the architecture of a complete fluid/structural subsystem for the company’s first product. The role unites structural, mechanical, and fluid considerations from concept to integration under tight timelines.

Responsibilities include selecting components, guiding analyses, and coordinating with vendors and other engineers to ensure safety, performance, and manufacturability.

Qualifications

• Demonstrated experience rapidly developing and integrating systems involving structural, fluid, and mechanical elements, supported by appropriate engineering analysis.
• Comfort working across both COTS sourcing and new component development, including the analytical evaluation of component performance, limitations, and integration tradeoffs.
• Experience evaluating make-versus-buy decisions through technical and programmatic analysis, including vendor selection, supplier capability assessment, and onboarding of vendors or subcontractors.
• Experience contributing to or leading clean-sheet system development, including early-stage architectural analysis and definition.
• Ability to integrate subsystem design into a larger vehicle or platform architecture while maintaining clear ownership of safety, functional performance, and the supporting analytical basis for design decisions.

Responsibilities

• This role reports to the Founder and CEO and is based onsite in San Diego.
• The engineer serves as the responsible engineer for a major mechanical subsystem on the first product. Responsibilities include defining the initial architecture, performing and guiding key analyses, selecting and integrating components, managing subsystem budget and schedule, and ensuring the system performs as intended. The role does not initially include direct reports but requires coordination with other engineers across the vehicle as well as management of vendors and subcontractors.
• The position combines subsystem technical ownership with programmatic responsibility. The engineer is expected to develop the subsystem in a scrappy and iterative manner while maintaining the level of technical clarity, analytical rigor, and professionalism required to support internal decision-making and external customer confidence.

Skills

Systems integration

COTS vs custom

Make-vs-buy analysis

Architectural analysis

Subsystem ownership

Job description

Reaxiomatic seeks a Staff Mechanical Systems Engineer to own the architecture of a complete fluid/structural subsystem for the company’s first product. The role unites structural, mechanical, and fluid considerations from concept to integration under tight timelines.

Responsibilities include selecting components, guiding analyses, and coordinating with vendors and other engineers to ensure safety, performance, and manufacturability.