About the Job
Empowering a Sustainable Future
Factorial develops breakthrough solid-state battery technology to enable safe, scalable, and high-performance cells for electric vehicles. Our portfolio of solid-state innovations includes the segment-leading FEST® (Factorial Electrolyte System Technology), which has been scaled in 100+Ah cells, works at room temperature, and is compatible with existing lithium-ion battery manufacturing equipment. With strong OEM backing, including joint development agreements with Mercedes-Benz, Stellantis, and Hyundai Motor Company, a world-class team of scientists, engineers, and business professionals, and cutting-edge R&D facilities, Factorial is pushing the boundaries of battery technology.
The Opportunity:Factorial is looking for a Senior/Staff/Principal Battery Engineer who will be responsible for EV large cell development with new lithium-ion battery technology for next generation cell technology. The successful candidate will take cell engineering and development role to join its team in Woburn, Massachusetts. This role requires extensive experience in lithium-ion cell product and process development engineering with large cell level for EV battery application (not material development, not module/system engineer, not ESS). Should be EV battery cell design and development. This role includes technical support for operation and R&D team, with technical cell level analysis. This candidate will also possess pilot scale sample process development to collaborate with R&D projects. In addition, this role will be closely involved in market research and must demonstrate excellent written and verbal communications skills to facilitate exchanges between various departments within the company in product design. This position will report to Sr. Director, Cell Engineering division
In this role, you will:
- Key member for next generation lithium ion battery and pouch cell level product
- Design, validate, and analyze lithium ion battery product for its application in high energy density lithium batteries
- Key member for large size next Gen cell fabrication process development to optimize product quality
- Provide engineering support to project teams to resolve quality issues
- Collaboration and communication with customer directly for cell development in terms of product and process and production either. Discuss with supplier for each technical information and performance
We are looking for people with:
- Bachelor or Master’s degree or higher in Materials Science, Chemical Engineering, or related fields
- 5+ years’ industrial experience in lithium ion battery cell development for EV application (major battery or OEM company)
- Proven track of success in lithium ion battery cell development project for EV application
- Proficient in the lithium ion battery cell process for pilot scale and sample fabrication
- Experience maintaining effective technical relationships with suppliers, customer and internal (and external) departments
- Willingness to execute on multiple tasks in a fast-paced start-up environment
- Ability to work within project teams and customer with dedication and technical excellence
Some of our competitive benefits include:
- Medical, dental, and vision insurance
- Generous paid time off
- 401(k) plan that includes employer matching funds
- Education assistance plan
- Short-term and long-term disability coverage
Work Location:
805 Middlesex Turnpike, Billerica, MA 01821
Factorial Energy is an equal opportunity employer that values diversity at all levels. All qualified applicants, regardless of personal characteristics, are encouraged to apply.
To request a reasonable accommodation to complete an application, job interview, and/or to otherwise participate in the hiring process, please contact recruitment@factorialenergy.com
About the Company

Factorial Energy
<p>Factorial is a dynamic venture-backed company dedicated to creating a sustainable future. With a passionate team of engineers and business professionals, Factorial is developing breakthrough solid-state batteries to offer longer range per charge and increased safety. The company entered joint development agreements with Mercedes-Benz, Stellantis, and Hyundai Motor Company and was recently featured in The Boston Globe and The New York Times.</p>
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