Mechanical Engineer

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.