Test Engineer - Energy Storage Systems

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Engineering Full Time Professional Everett, WA, US

Salary Range: $ To $ Annually

About magniX:Based in the beautiful Pacific Northwest, magniX builds solutions for the electric age, applying its aerospace-grade batteries, power electronics, power distribution, electric engines, and software to mission-critical applications across data centers, energy storage, defense, mobility, space, and aerospace. Built on an 800-volt architecture, magniX technology delivers industry-leading energy density, cycle life, and safety, and magniX electric engines have powered more than 200 flights across six different airframes, where the company remains the industry leader.

As magniX extends its aerospace-grade standards into new markets, we are building a commercial organization to match, and are now ready to take our technology and products to market. Be part of a passionate team that is ushering in the electric age.

About the Role
:
Join magniX as an Test Engineer, Energey Storage Systems and play a pivotal role in advancing electric aviation through cutting‑edge lithium‑ion battery technology. As a member of the magniX test team, you’ll lead testing programs for Energy Storage Systems, from individual cell characterization to full‑scale integrated battery systems, supporting the development of next‑generation electric aircraft propulsion.

Primary Responsibilities
:

• Commission and operate battery laboratories and high‑power electrical test systems for development testing, design verification, and failure mode analysis
• Execute test programs spanning individual cells, battery modules, and complete integrated systems on test rigs and aircraft platforms
• Develop test methods and instrumentation for battery cell and Energy Storage System (ESS) testing, including designing, installing, and maintaining the data acquisition systems
• Define test strategies and requirements with the program management, simulation, design, and integration teams, and plan the test resources needed to deliver them
• Develop data processing tools using LabVIEW, HBM Perception, and/or Python for measurement, control, and analysis
• Create and maintain test documentation including test instructions, plans, reports, and datasets within our quality management framework
• Support ESS integration into flying test platforms and participate in flight test operations
• Provide on‑site technical support at customer locations and work occasional rotating shifts as program needs require
• Support other magniX test programs beyond ESS as part of the test team

Required Qualifications
:

• Bachelor's degree or higher in Engineering (Mechanical, Chemical, Electrical, Materials Science, or related discipline). Master’s is preferred.
• 5+ years of hands‑on battery testing experience, including cell characterization, module testing, and system‑level validation, or equivalent specialization through graduate education. Lithium‑ion experience is strongly desired.
• Experience with battery cyclers (Maccor, Arbin, NEWARE or similar) and potentiostat systems (Bio Logic or similar)
• High‑voltage DC systems proficiency with experience in HVDC sources and supporting electrical equipment

Preferred Qualifications:

• Electrochemical characterization expertise including dQ/dV analysis and electrochemical impedance spectroscopy (EIS)
• Battery safety, abuse testing, and failure mode analysis experience, such as UN38.3 compliance tests and DO-311A safety tests
• FAA certification experience with aircraft systems and components
• Advanced LabVIEW proficiency with additional skills in MATLAB and Python highly valued
• Hands‑on…