Battery Mechanical Engineer

magniX USA Inc; Everett (WA); On-site; USD 160,000 - 190,000; Full time

Benefits offered by this job

100% company-paid premiums for medical

4 weeks paid vacation

401K with 9.5% company contribution

Company paid Life Insurance & AD&D

Disability insurance

Catered lunches & quarterly events

Job summary

magniX USA Inc. is seeking a Battery Mechanical Engineer in Everett, WA to lead the design and integration of lithium-ion battery packs for electric and hybrid-electric aerospace applications. The role blends hands-on design with technical leadership to guide partners and suppliers.

The candidate will develop mechanical packaging concepts, perform CAD modeling, and ensure compliance with aerospace structural, thermal, and safety requirements, including thermal runaway containment and testing.

Qualifications

• Bachelor’s degree in Engineering as required.
• 5+ years of experience with EV lithium battery pack design.
• Experience with high voltage (400V+) and large packs (50kWh+).

Responsibilities

• Develop mechanical and structural packaging concepts for lithium-ion battery packs.
• CAD modeling of modules, pack enclosures, mounting systems, and installation interfaces.
• Ensure designs meet aerospace structural, thermal, vibration, and safety requirements.
• Define and execute test plans for battery module mechanical testing and thermal runaway containment.

Skills

EV battery design experience

Battery pack integration

Education

Bachelor’s degree in Electrical, Mechanical, or Chemical Engineering

Tools

SolidWorks

Job description

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

Battery Mechanical Engineer

Full Time Technical Everett, WA, US

8 days ago Requisition ID: 1117

Salary Range: $160,000.00 To $190,000.00 Annually

About the role:As a Battery Mechanical Engineer at magniX, you will lead and contribute to the design, specification, and integration of advanced lithium-ion battery packs for electric and hybrid-electric aerospace applications. This role blends hands-on conceptual design with the technical leadership required to guide partners and suppliers through detailed development and industrialization.

Primary Responsibilities:

• Develop lithium-ion battery pack mechanical and structural packaging concepts in collaboration with magniX engineers and external suppliers.
• Perform CAD modeling of modules, pack enclosures, mounting systems, and aircraft installation interfaces.
• Ensure designs meet aerospace structural, thermal, vibration, and safety requirements.
• Thermal runaway containment strategy design and development
• Define and execute test plans for battery module mechanical testing, including thermal runaway propagation and containment, structural performance, and environmental testing.
• Define battery pack requirements from the system level down to individual components, considering aircraft integration, safety, and certification needs.
• Provide technical oversight and guidance to partners and suppliers responsible for detailed pack design and manufacturing development.
• Review design artifacts, analyses, engineering changes, and qualification plans to ensure alignment with magniX requirements.
• Contribute to program planning activities related to battery pack development, verification, production readiness, and industrialization.
• Participate in development of certification strategies and means of compliance for high-voltage battery systems.

Required Qualifications:

• Bachelor’s degree in Electrical, Mechanical, or Chemical Engineering
• 5 years of experience with EV lithium battery pack design
• Experience with high voltage and large size battery packs (400V+ and 50kWh+)

Preferred Qualifications:

• Experience with specification and procurement of battery pack components and material
• Experience with qualification strategy development and testing of battery packs, including thermal runaway containment
• Proficient in CAD design tools (preferably Solidworks)

Location:Applicants must be willing and able to commute to magniX's location in Everett, Washington.

• 100% company-paid premiums for medical, dental, and vision insurance (for employees & dependents).
• 4 weeks paid vacation + 1-week annual end-of-year shutdown, sick time, and 11 paid holidays.
• 401K retirement plan with industry leading 9.5% company contribution.
• Company paid Life insurance, AD&D, Short-Term and Long-Term disability insurance
• Catered lunches and quarterly company fun-day events!