Senior / Staff MES System Engineer
Who We Are Factorial Energy is a pioneering U.S.-based solid-state battery company driving the future of energy storage and electrification. Partnered with global leaders including Mercedes-Benz, Stellantis, Hyundai, and Kia, Factorial is at the forefront of developing next-generation e-mobility platforms for commercial, defense, and consumer applications—spanning electric vehicles (EVs), drones, eVTOL aircraft, power tools, marine systems, robotics, and more. The company has achieved multiple industry firsts, including being the first to power a demonstration vehicle with a global OEM (Mercedes- Benz) which achieved over 1,200 km (749 mi) of range, and the first to earn UN 38.3 certification for automotive-sized lithium-metal solid-state cells, the first to deliver B-samples of automotive-sized solid-state batteries to major OEMs. The Opportunity: Factorial Energy is seeking a Senior / Staff MES System Engineer to join our Cheonan, South Korea site. This role takes charge of the full-lifecycle implementation, customization, validation, operation optimization, and mass production iteration of the Manufacturing Execution System (MES) for solid-state & silicon anode pouch cell production lines. The ideal candidate will lead MES requirement analysis, system deployment, equipment data interconnection, process digitization upgrade, and build standardized factory digital management systems to support new product ramp-up, yield improvement, and intelligent manufacturing construction. In this role, you will: Lead MES system requirement analysis, functional design, secondary development, testing, and user training for cell manufacturing processes, covering cell finishing, assembly, testing, and warehouse logistics modules. Realize data interconnection and seamless docking between MES and production equipment, PLC, vision system, testing instrument, ERP, and WMS, ensuring real-time, accurate, and traceable collection of production data, quality data, and equipment data. Conduct MES system FAT/SAT acceptance and IQ/OQ/PQ validation, formulate system operation specifications, data management standards and audit standards to meet automotive battery industry quality compliance requirements. Optimize MES production scheduling, process routing, quality inspection judgment, material scanning, and data reporting logic; solve system bugs and business bottlenecks; and improve production transparency and line operation efficiency. Build standardized digital management systems, including MES operation SOPs, system maintenance specifications, data backup mechanisms, and exception-handling processes, to ensure stable and continuous system operation during mass production ramp-up. Collaborate with cross-functional teams including Manufacturing, Process, Quality, Equipment and IT, as well as external system vendors, to promote new production line MES deployment, function iteration and digital transformation projects. Optimize MES data acqui...