SlipstreamJobs tracks this role from the company's public career site. Apply directly on the employer's site.
Salary: USD 126,000 - 181,000 / annual
1X is building humanoid robots designed to operate safely in homes, handling chores and tasks. NEO is their flagship robot currently shipping to customers. The Battery team develops the energy storage systems powering NEO, working across battery cells, pack architecture, mechanical integration, electrical systems, battery management, thermal management, charging, safety, validation, and manufacturing.
In this role, you will own critical elements of NEO's battery system from architecture and component selection through design, prototyping, characterization, validation, and production. You'll develop compact, lightweight, safe, and reliable battery solutions capable of supporting the dynamic power requirements of a humanoid robot operating daily around people. Working hands-on with cells, modules, packs, test systems, and complete robots, you'll use data from laboratory testing and real-world operation to continuously improve performance, safety, lifetime, and manufacturability.
Key responsibilities include:
- Design and release production-ready battery systems meeting energy, power, weight, volume, thermal, safety, reliability, cost, and manufacturability requirements
- Develop battery pack architectures integrating cells, busbars, interconnects, sensing, protection, BMS hardware, thermal management, enclosures, and structural interfaces
- Define and validate cell and pack performance requirements across charge, discharge, peak power, temperature, aging, and real-world robot duty cycles
- Improve battery energy density, power capability, thermal performance, cycle life, reliability, and serviceability through iterative engineering and testing
- Develop characterization and validation methods for cells, modules, packs, charging systems, and battery safety
- Identify battery failure modes through testing and data analysis and drive design improvements
- Support battery hardware through prototype builds, design validation, NPI, supplier qualification, and production ramp
- Partner closely with Electrical, Embedded Software, Mechanical, Controls, Reliability, Manufacturing, and Supply Chain teams
You should be a builder who moves fast, owns work completely, and is deeply connected to hardware and data. Successful engineers on the Battery team balance energy, power, weight, volume, thermal performance, safety, lifetime, manufacturability, cost, and serviceability. You'll be comfortable moving from battery architecture and first-principles analysis to instrumenting cells, building packs, analyzing cycling data, diagnosing failures, and implementing design revisions. You work effectively across electrical, mechanical, software, and manufacturing boundaries.
REQUIREMENTS:
- Bachelor's degree in Mechanical Engineering, Electrical Engineering, Chemical Engineering, Materials Science, or 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, including cells, interconnects, sensing, protection, thermal management, and mechanical packaging
- Experience defining and executing battery characterization and validation testing
- Experience analyzing battery performance data and using test results 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
PREFERRED SKILLS:
- Experience developing battery systems for robotics, electric vehicles, consumer electronics, aerospace, drones, or other high-performance mobile products
- Experience with cylindrical, pouch, or prismatic lithium-ion cells and cell selection and qualification
- Experience with Battery Management Systems (BMS), including cell monitoring, state estimation, protection strategies, and fault handling
- Experience with battery thermal management, thermal modeling, cooling strategies, and temperature sensing
- Experience with high-current electrical design, busbars, connectors, fusing, contactors, and battery protection hardware
- Experience developing battery test fixtures, cycler-based characterization, life-cycle testing, abuse testing, or reliability validation systems
- Experience with cell aging, cycle-life modeling, State of Charge (SOC), State of Health (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 with rapid design iteration and frequent prototype builds
- Experience supporting battery systems through NPI, qualification, reliability testing, and high-volume production ramp
