# Sr. Mechanical Engineer

**Company:** [Fourier](https://hotfix.jobs/companies/fourier-audio)
**Location:** Mountain View, CA
**Role:** Hardware Engineering
**Salary:** $150k – $210k/yr
**Experience:** 6+ years
**Skills:** Solidworks, 3D Cad, FEA, GD&T, DFM, Dfa, Thermal Management, P&Id, Plm, Asme Y14.5
**Posted:** 2026-05-27

> Lead mechanical design, integration, and validation of commercial hydrogen electrolyzer systems. Own CAD, thermal/structural analysis, DFM/DFA, and cross-functional coordination with electrical and manufacturing teams.

## Job Description

## Responsibilities
- Lead concept development, design trades, and down-select decisions for all mechanical subsystems from water purification through post-production H₂ purification
- Own 3D CAD design of complex parts and assemblies using SolidWorks or equivalent — including sheet metal, plastics, insulation systems, sealing methods, connectors, and fasteners
- Review and develop process flow diagrams, P&IDs, and mechanical design documentation
- Perform first-principles hand calculations for sizing and performance of fluid, thermal, and structural systems
- Collaborate closely with electrical and electronics engineering teams to integrate HV power electronics and LV control, sensing, and communications systems into mechanical enclosures
- Design packaging solutions for HV electrical assemblies — including bus bars, power modules, and high-current connectors — ensuring proper insulation, creepage/clearance compliance, and thermal management
- Design and validate cooling technologies (heat exchangers, forced-air systems) for thermal management of electrolyzer stacks, power electronics, and ancillary electrical components
- Ensure enclosure designs meet relevant electrical safety standards (UL, IEC, NFPA) for HV systems
- Define and manage interface control documents (ICDs) between mechanical and electrical subsystems
- Partner actively with manufacturing engineering to embed DFM and DFA principles from the earliest concept phase through production release
- Create and maintain full Balance-of-Plant (BoP) documentation including Bills of Materials, P&IDs, and fluid system specifications
- Hands-on experience or strong familiarity with gas (hydrogen, nitrogen, oxygen) and water piping systems, including pressure ratings, material compatibility, and leak testing protocols
- Develop test plans and lead laboratory test and validation activities to confirm product reliability, safety, and performance
- Create and maintain PLM documentation including Bills of Materials, engineering drawings, design calculations, and FMEAs

## Requirements
- B.S. in Mechanical Engineering or equivalent; 6+ years of relevant experience in commercial product design and development
- First-principles understanding of statics, mechanics, materials science, heat transfer, thermodynamics, and fluid dynamics
- Extensive experience taking mechanical designs from concept through production, including prototype builds and manufacturing release
- Proven experience in DFM/DFA — working hand-in-hand with manufacturing partners
- Demonstrated experience packaging and integrating electromechanical systems involving both HV and LV electrical components
- Proficiency in 3D CAD (SolidWorks strongly preferred) and Thermal & Structural FEA tools
- Strong hands-on aptitude — comfortable in the lab, on the shop floor, and at the test rig
- Experience creating GD&T-compliant 2D fabrication drawings (ASME Y14.5)

## Nice-to-Haves
- Advanced degree (M.S. or Ph.D.) in Mechanical Engineering or closely related field
- Experience with PEM electrolysis, fuel cell systems, or related electrochemical systems
- Hands-on experience with hydrogen, oxygen, nitrogen, or other high-purity gas systems — including pressure management, material selection (316L SS, PTFE, PEEK), and leak testing
- Experience with water purification technologies (deionization, ultrafiltration, reverse osmosis) and post-production gas purification
- Multi-physics and CFD simulation experience (ANSYS Fluent, COMSOL, or similar)
- Familiarity with electrical safety standards relevant to HV systems: UL 508A, IEC 60204, NFPA 70E
- Experience with PLM systems for BOM and drawing management

## Compensation & Benefits
- Fully paid Medical, Dental, and Vision coverage
- Competitive salary and equity compensation commensurate with experience
- 401k Retirement Plan
- Paid sick days and vacation
- In-office lunches

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