Senior Manufacturing Engineer, Battery

The role

You will own critical elements of the NEO battery system from architecture and component selection through design, prototyping, validation, and production. You will develop compact, lightweight, and reliable battery solutions for humanoid robots.

What you will do

• Design and release production-ready battery systems
• Develop battery pack architectures integrating cells, busbars, sensing, and thermal management
• Define and validate cell and pack performance requirements
• Improve battery energy density, power, thermal performance, and reliability
• Develop characterization and validation methods for battery components
• Identify battery failure modes through testing and data analysis
• Support battery hardware through prototype builds, NPI, and production ramp
• Partner with Electrical, Mechanical, Software, and Supply Chain teams

Required qualifications

• Bachelor’s degree in Mechanical Engineering, Electrical Engineering, Chemical Engineering, Materials Science, or a related engineering field
• 5+ years of engineering experience developing battery systems, energy storage systems, or complex electromechanical products
• Experience developing fixtures and test equipment
• Experience developing lithium-ion battery packs, modules, cells, or related energy storage systems
• Strong understanding of lithium-ion cell performance, charging and discharging behavior, degradation, thermal behavior, and safety
• Experience with battery pack architecture and integration
• Experience defining and executing battery characterization and validation testing
• Experience analyzing battery performance data to drive engineering decisions
• Experience with battery safety, fault analysis, failure modes, and design mitigation strategies
• Experience supporting hardware from prototype development through design validation and production
• Experience collaborating with electrical, mechanical, embedded software, manufacturing, quality, reliability, and supply chain organizations

Nice to have

• Experience developing battery systems for robotics, electric vehicles, consumer electronics, aerospace, or drones
• Experience with cylindrical, pouch, or prismatic lithium-ion cells and cell selection and qualification
• Experience with Battery Management Systems (BMS)
• Experience with battery thermal management, thermal modeling, and cooling strategies
• Experience with high-current electrical design, busbars, connectors, fusing, and contactors
• Experience developing battery test fixtures, cycler-based characterization, or abuse testing
• Experience with cell aging, cycle-life modeling, SOC, SOH, and performance degradation analysis
• Familiarity with battery safety and transportation standards such as UL, IEC, and UN 38.3
• Experience working directly with cell manufacturers, battery suppliers, and contract manufacturing partners
• Experience operating in fast-paced hardware environments

Benefits

• Comprehensive medical, dental, and vision coverage
• Generous paid time off, company holidays, and parental leave
• 401(k) plan with company match (100% on the first 3% of contributions, 50% on the next 2%)
• Flexible Spending Accounts (FSA) and Health Savings Accounts (HSA) options
• Commuter benefits (transit and parking)
• Short-term and long-term disability, and life insurance
• Employee Assistance Program (EAP) for mental health, financial, and personal support
• Onsite snacks and catered lunches

About the company

1X builds humanoid robots that work in homes to do chores and handle tasks. They solve robotics, AI, and manufacturing to create the NEO flagship robot.