Battery Test Engineer - Robotics

About 1X

We’re building humanoid robots that work in home - doing the chores, handling the tasks, and giving people their time back. Simple, but it’s not.

To do this right, we have to solve robotics, AI, manufacturing - at the same time, at scale, in a form factor that has to be safe enough to live with your family. If you’re inspired by this, you’ll thrive here. We’ve been at this since 2014 and we’re at the point where the hard problems are behind us and the hard work is in front of us.

NEO is our flagship - a home robot designed to move, learn, and operate in the real world alongside real people. We’re not demoing it - we’re shipping it. We’re excited to meet you, if this excites you.

If you’ve spent your career working on problems that matter and want to see them actually reach the world - this is that moment. We’re scaling, we’re hiring with intention, and we need people who want to build something that will genuinely change how humans spend their time - safely creating abundance for all.

The Energy Systems Engineering team develops the battery systems that power NEO throughout its daily operation. From cell characterization and battery management algorithms to pack design and system-level energy optimization, the team is responsible for delivering safe, reliable, and high-performance energy systems for humanoid robotics.

Battery performance directly impacts robot capability, runtime, reliability, and user experience. This team works closely with hardware, firmware, controls, robotics, and fleet operations teams to ensure our battery systems perform safely and predictably under demanding real-world conditions.

Generate the data that drives battery performance, reliability, and safety.

You will design and execute battery testing programs that characterize cells, modules, packs, and complete robotic battery systems under realistic operating conditions. Your work will provide the foundation for battery algorithms, hardware validation, fleet analysis, and long-term reliability improvements.

As a Battery Test Engineer, you will play a critical role in understanding how batteries behave in the real world and ensuring our energy systems meet the demands of humanoid robotics.

• Develop and execute battery test campaigns that generate high-quality data for performance, aging, safety, and reliability analysis

• Create robotic duty-cycle test profiles that accurately represent real-world operating conditions, including 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 SoC, SoH, fault detection, and protection strategies

• Deliver actionable insights and recommendations that improve battery design, algorithms, safety, and field performance

• Strong understanding of lithium-ion battery behavior, degradation mechanisms, and safety considerations

• Hands-on laboratory experience with battery testing equipment and experimental validation methods

• Strong analytical mindset with the ability to extract meaningful insights from large datasets

• Excellent troubleshooting and root-cause analysis skills

• Strong communication and documentation skills that support cross-functional engineering collaboration

• BS or MS in Electrical Engineering, Mechanical Engineering, Energy Systems, or a related field

• 2+ years of experience in battery testing, validation, reliability engineering, or a related field

• Hands-on experience working with lithium-ion cells, modules, or battery packs

• Experience operating battery cyclers, environmental chambers, and laboratory test equipment

• Experience analyzing test data using Python, MATLAB, or similar technical computing tools

• Comfortable working in laboratory environments and following rigorous safety procedures

• Experience testing batteries for robotics, automotive, aerospace, industrial equipment, or other high-reliability systems

• Familiarity with battery management systems (BMS), SoC/SoH estimation, and battery algorithms

• Experience…