Mechanical Engineer

Factorial Energy is seeking a Mechanical Engineer in South Korea to design cell structures and optimize mechanical designs for solid-state batteries. Collaborate with global leaders in e-mobility and enjoy a dynamic work environment. Benefit from opportunities for professional growth and innovation in the renewable energy sector. Become a Mechanical Engineer with Factorial Energy in South Korea, a leader in solid-state battery technology. In this role, you will design mechanical structures, optimize designs for safety and reliability, and support module-level integration. Collaborate with industry giants like Mercedes-Benz and Hyundai. Enjoy a vibrant work culture and the chance to contribute to groundbreaking energy solutions.

Factorial Energy South Korea On-site Full Time UTC+09:00

Factorial Energy

Company Overview

Name

Factorial Energy

Headquarters

Woburn, Massachusetts, United States

Founded

2013

Size

Approximately 150 employees (source: linkedin.com). Factorial has raised over $65 million and achieved a $1 billion valuation (source: batteryburnbook.com).

What They Do

Factorial Energy specializes in the development of solid-state batteries, which are pivotal for various applications including electric mobility, defense, AI/robotics, aviation, power tools, marine vehicles, consumer electronics, and energy storage systems. Their technology emphasizes high energy density, achieving 350-450 Wh/kg compared to the 200-300 Wh/kg typical of current electric vehicle (EV) cells. Additionally, Factorial's batteries are designed for enhanced safety, fast charging capabilities, and a wide operational temperature range from -30°C to 45°C (source: factorialenergy.com).

The core of their innovation lies in the Factorial Electrolyte System Technology (FEST®), which utilizes a quasi-solid polymer electrolyte combined with an ultrathin lithium-metal anode and a high-capacity cathode. This technology allows for approximately 80% compatibility with existing lithium-ion production lines, facilitating scalability and integration into current manufacturing processes (source: factorialenergy.com).

Complementary technologies such as Solstice™, a sulfide-based all-solid-state electrolyte, and Gammatron™, an AI-driven battery digital twin software, further enhance their offerings. Solstice™ boasts high thermal stability and zero liquid content, while Gammatron™ accelerates R&D in electrolyte development and battery management systems (source: enertherm-engineering.com).

Projects & Track Record

Factorial Energy has achieved significant milestones in battery development, including a series of prototypes that have progressively increased in capacity and complexity. Notable achievements include the validation of 0.6 Ah Li-metal chemistry in 2017, the introduction of a 40 Ah 30-layer graphite anode prototype in 2021, and the unveiling of a 106 Ah automotive B-sample cell at CES 2023. These advancements demonstrate Factorial's commitment to pushing the boundaries of solid-state battery technology (source: factorialenergy.com).

Recent Developments

In October 2023, Factorial Energy inaugurated its $50 million manufacturing facility in Methuen, Massachusetts, which is set to be the largest solid-state battery production line in the U.S. with a capacity of 200 MWh. This facility is expected to significantly enhance their production capabilities and support the scaling of automotive applications (source: waveep.com).

In 2024, the company shipped 106 Ah B-samples to various OEMs and unveiled their Solstice™ technology after a period of stealth development. Additionally, they have been recognized as a leading player in the deep tech sector, ranking #25 among the Top 100 Private Deep Tech Companies (source: factorialenergy.com).

Working There

Factorial Energy is actively hiring across various departments including R&D, manufacturing, sales, and engineering, particularly in response to their recent expansion efforts. The Methuen facility is expected to create over 150 jobs, contributing to the local economy while supporting the company's growth in solid-state battery production. The company culture emphasizes speed and innovation, with a focus on ethical governance and sustainability goals, including a commitment to carbon-neutral production by mid-2030 (source: factorialenergy.com).

Contact

Website · Careers · LinkedIn

Last updated on 2025-12-27 | Report an issue

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.