Formation Process Engineer/ Senior Engineer - 3C Battery

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 Formation Process Engineer/ Senior Engineer to join our team in our Cheonan, South Korea location. This person will be responsible for the development, optimization, and mass-production support of formation and grading processes for our Silicon Power Cell line. This role covers the full formation lifecycle — from R&D validation through pilot scale-up to high-volume manufacturing — with a focus on silicon anode-specific formation protocol development, SEI stability, and high-rate capability optimization. The ideal candidate brings deep electrochemical engineering expertise , hands-on formation equipment experience, and a data-driven approach to process improvement and yield stabilization.

In this role, you will:

• Lead development and optimization of formation protocols for Si-based power cells, including pre-formation, standard formation, and step-charge strategies tailored to silicon anode expansion behavior
• Design and validate formation recipes (charge/discharge C-rates, temperature windows, cutoff conditions) to maximize ICE, SEI film uniformity, and suppress lithium plating risk on high-Si anodes
• Establish capacity grading specifications defining key binning parameters including capacity, DCIR, and self-discharge rate
• Develop product-specific formation programs optimized for high-rate power cell requirements
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