Battery Mechanical Engineer

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

Benefits offered by this job

Medical, dental, vision insurance (100

4 weeks paid vacation

11 paid holidays

401K with 9.5% company contribution

Life, AD&D, disability insurance

Catered lunches

Quarterly company events

Job summary

magniX is seeking a Battery Mechanical Engineer to lead the design, specification, and integration of advanced lithium-ion battery packs for electric and hybrid‑electric aerospace applications. You will guide partners and suppliers through development and industrialization with hands-on conceptual work and leadership.

The role requires a Bachelor’s in engineering and 5+ years in EV pack design, with experience on 400V+ and 50kWh+ systems, and proficiency in CAD tools such as SolidWorks.

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 capacity packs (400V+ and 50kWh+).

Responsibilities

• Develop mechanical and packaging concepts for lithium-ion battery packs.
• CAD modeling of modules, enclosures, mounting systems, and interfaces.
• Ensure designs meet aerospace structural, thermal, vibration, and safety requirements.
• Design thermal runaway containment strategies.
• Define and execute battery pack test plans for mechanical tests.
• Set pack requirements from system level to components for integration and certification.
• Provide oversight to partners and suppliers on pack design and manufacturing.
• Review artifacts, changes, and qualification plans for magniX alignment.
• Contribute to program planning for battery development and industrialization.

Skills

Battery pack design

EV systems

CAD modeling

Education

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

Tools

SolidWorks

Job description

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.

Compensation & Benefits

• 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!

Salary Range

$160-$190k