Mechanical Engineer

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.

Job Description

• Design cell mechanical structures and deliver high-quality 2D/3D production drawings.
• Review mechanical designs for feasibility, manufacturability, and performance robustness.
• Optimize mechanical design to improve safety, yield, productivity, and product reliability.
• Design and qualify jigs, fixtures, and mechanical components (tabs, pouch foils, trays, cans, cover plates, etc.).
• Analyze cell breathing and swelling behavior to manage mechanical expansion risks.
• Perform dimensional stack-up, tolerance analysis, and DFM/DFA to support strong mass production readiness.
• Support module-level mechanical integration with customers and participate in design reviews.
• Troubleshoot mechanical issues, conduct root cause analysis (RCA), and drive corrective and preventive actions.
• Create and maintain BOMs, assembly drawings, mechanical specifications, and design documentation.

Qualifications

• BS/MS in Mechanical Engineering or related discipline.
• 3+ years of mechanical design experience in product development (battery industry preferred).
• Proficiency with 3D CAD software (SolidWorks, CATIA, Creo, etc.).
• Working knowledge of ASME standards and GD&T practices.
• Strong communication and collaboration skills in cross-functional environments.
• Self-motivated with a strong problem-solving mindset and accountability for results.
• English fluency required; proficiency in Korean or Chinese is a plus.