1X
Battery Test Engineer
About this role
1X is seeking a Battery Test Engineer to design and execute comprehensive testing programs for lithium-ion battery systems powering their humanoid robot NEO. You'll generate critical performance and reliability data that drives battery algorithms, validation, and real-world operational improvements for a robot designed to safely operate in home environments.
What you'll do
- Design and execute battery testing campaigns across cells, modules, packs, and complete robotic systems under realistic operating conditions
- Create robotic duty-cycle test profiles that simulate real-world transient loads, regenerative events, and continuous operation
- Identify battery degradation mechanisms, failure modes, and performance limitations through structured testing and analysis
- Support validation of battery management systems including state-of-charge, state-of-health, fault detection, and protection strategies
- Analyze large datasets to extract actionable insights and deliver recommendations for battery design and algorithm improvements
- Collaborate cross-functionally with hardware, firmware, controls, and fleet operations teams
What they're looking for
- Lithium-ion battery behavior and degradation mechanisms
- Battery testing equipment operation (cyclers, environmental chambers)
- Data analysis using Python, MATLAB, or similar technical computing tools
- Root-cause analysis and troubleshooting
- Laboratory experimental validation methods
- Battery management systems and SoC/SoH estimation
- Technical documentation and cross-functional communication
- Automated test systems and test workflow scripting
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1X
1X builds humanoid robots for home use, with its NEO robot requiring sophisticated hardware, firmware, and cloud systems. The company is hiring across compliance testing, audio systems, embedded firmware, cloud platform development, and supplier engineering to bring its robots to production and scale.
View all jobs at 1XLikely interview questions
- Walk us through a battery testing campaign you've designed—what were the key parameters you measured, and how did you translate real-world duty cycles into test profiles?
- Describe your hands-on experience with battery cyclers and environmental chambers. What equipment have you used, and what was the most challenging test setup you've implemented?