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, the first to earn UN 38.3 certification for automotive-sized solid-state cells, and the first to deliver B-samples of automotive-sized solid-state batteries to major OEMs. 

The Opportunity

Factorial is looking for an All-Solid-State Battery Anode Wet & SE Slurry Coating Process Engineer responsible for the wet slurry coating process and equipment development for anode and sulfide-based solid electrolyte (SE) applications. We leverage cutting-edge wet electrode manufacturing to revolutionize all-solid-state battery performance, cost, and scalability. This role requires experience in close cooperation with internal teams and external partners. This candidate will be involved from the beginning of process optimization for R&D projects, pilot line scale-up, and through to low/high-volume production. The candidate must demonstrate excellent written and verbal communication skills to facilitate efficient communication between various departments/vendors.

Duties and Responsibilities 

Duties and responsibilities include, but are not limited to: 

All-Solid-State Battery Anode Wet & SE Slurry Coating Process Development

• Lead R&D efforts to design, optimize, and scale wet slurry coating processes for ASSB anode and sulfide SE applications.
• Develop novel slurry formulations and coating strategies to enhance electrode-electrolyte interfacial compatibility, ionic transport efficiency, and cycling stability.
• Establish critical process parameters (e.g., slurry dispersion, viscosity control, coating speed, drying profiles) to meet all-solid-state battery performance specifications.
• Address key wet coating challenges specific to ASSB: solvent selection, slurry sedimentation, SE-solvent compatibility, and interfacial side reaction control.

Quality & Yield Improvement

• Identify root causes of wet coating defects (e.g., pinholes, thickness non-uniformity, cracks, lithium dendrite penetration) and implement corrective actions.
• Utilize statistical analysis (SPC, DOE) to drive yield improvements and reduce process variability.
• Collaborate with PD/QA to define testing protocols and quality standards for wet-processed all-solid-state electrodes.

Production Efficiency & Scalability

• Optimize manufacturing workflows to increase throughput and reduce unit production costs.
• Design experiments to validate process scalability from lab to pilot line to mass production.
• Troubleshoot equipment/process issues to minimize downtime.

Next-Generation Equipment Development

• Partner with equipment vendors to conceptualize, prototype, and validate next-gen wet coating electrode machinery.
• Define technical specifications for new equipment (e.g., vacuum-integrated drying systems, solvent recovery units).
• Drive innovation in automation, in-line monitoring, and Industry 4.0 integration.

Must Have Qualifications

Technical Expertise:

• 3+ years of hands-on experience in wet electrode coating manufacturing for lithium-ion batteries, sulfide electrolyte system experience highly preferred.
• Deep knowledge of wet process steps: slurry preparation (dispersion, deaeration), precision coating (doctor blade/slot-die), vacuum drying, calendaring, and lamination.
• Proficiency in material characterization (SEM, XRD, adhesion testing) and data analysis tools (JMP, Minitab).

Process & Quality Tools:

• Mastery of DOE, SPC, FMEA, and Six Sigma methodologies.
• Experience scaling processes from R&D to high-volume production.

Equipment & Innovation:

• Proven ability to collaborate with equipment suppliers on custom solutions.
• Familiarity with ASSB-specific process challenges (moisture control, interfacial stability, mechanical pressure sensitivity).

Education & Collaboration:

• Master's in chemical/Materials/Mechanical Engineering or related field.
• Strong cross-functional skills to work with R&D, production, and supply chain teams.

Nice to Have Qualifications

Preferred Qualifications:

• Hands-on experience with sulfide solid electrolyte systems or halide electrolyte systems.
• In-depth understanding of binder systems (PVDF, CMC/SBR) and conductive additives behavior in wet coating processes.

Job's mission

As a Senior Engineer II, Process Engineering (PECVD) at ASM Korea, you will play a key role in developing, optimizing, and supporting advanced PECVD processes for leading semiconductor customers.
This role is based in Korea, with primary responsibility for supporting Japan-based customers and projects, requiring strong execution capability, deep process understanding, and excellent communication skills in a global environment. You will work closely with customers, field, and global R&D teams to enable high‑volume manufacturing and next‑generation device applications.

What you will be working on

• Develop, optimize, and support PECVD processes for dielectric and functional thin films (including SiO, SiC) for logic, memory, analog, power, and MEMS applications.
• Design, execute, and analyze complex experiments using DOE and RSM, and interpret advanced process and materials characterization results.
• Drive process transfer, customer demonstrations, and high‑volume manufacturing (HVM) support.
• Troubleshoot process and equipment issues through hands‑on engagement and structured problem‑solving methodologies.
• Collaborate with global R&D, field service, and marketing teams to define customer requirements and deliver robust process solutions.
• Produce and present technical documentation, internal reports, and customer-facing materials, ensuring clarity and execution readiness.

What we are looking for

• Master’s degree or PhD in Chemical Engineering, Materials Science, Electrical Engineering, Physics, or related field.
• Hands‑on experience with PECVD or related thin film deposition technologies (e.g., ALD, PEALD, CVD, Epitaxy).
• Strong understanding of thin film materials and semiconductor process integration.
• Experience with materials characterization techniques such as XPS, SIMS, SEM, TEM, AFM, XRD, ellipsometry, or equivalent.
• Ability to work independently in complex, execution‑driven environments and manage multiple technical priorities.
• Fluent English communication skills required for daily collaboration with global and Japan-based stakeholders.
• Willingness to travel to Japan as required to support projects.

What sets you apart

• PhD degree preferred, especially with research or industry experience in PECVD process development.
• Direct experience with SiO and/or SiC film development for advanced device applications.
• Strong background in high‑volume manufacturing (HVM) support and customer‑facing process execution.
• Ability to bridge process technology, equipment behavior, and customer requirements effectively.
• Japanese language proficiency is a strong plus.
• Demonstrated ability to author technical papers, contribute to intellectual property, or present to technical audiences.

Job's mission

As a Principal / Senior Process Engineer, you will play a key role in advancing ASM’s semiconductor process technologies. You’ll leverage your expertise in thin-film deposition and materials characterization to develop innovative solutions for next-generation devices. Your work will directly influence product performance and enable breakthroughs in logic, memory, and power applications.

What you will be working on

• Research, develop, and optimize semiconductor processes focused on Advanced Packaging including depositions (ALD, PECVD, PVD, ECP) and surface preparation.
• Design and conduct complex experiments using DOE and RSM methodologies; interpret and analyze experimental data.
• Develop new films or processes for emerging packaging applications like W2W/D2W Hybrid bonding and perform advanced materials characterization.
• Provide mentorship to Process Engineers and lead technical problem-solving sessions using scientific methods and tools such as Ishikawa diagrams.
• Collaborate with customers and marketing teams to define requirements and execute demonstrations.
• Troubleshoot equipment issues through hands-on engagement and ensure successful product transfer to customers.
• Draft technical papers, generate Intellectual Property, and present findings to professional audiences.
• Travel up to 10% to support remote sites and customer engagements.
• May supervise process engineering technicians and provide input on performance evaluations.

What we are looking for

• Bachelor's, Master’s or PhD in Chemical Engineering, Materials Science, Electrical Engineering, or Physics.
• Direct experience working on D2W/W2W Hybrid bonding including surface preparation steps
• Minimum 10 years of combined education, research, and work experience in thin-film deposition (ALD, CVD, PECVD) and advanced packaging processes.
• Proficiency in materials characterization techniques (XPS, SIMS, RBS, AFM, XRR, XRD, TEM, SEM, ellipsometry).
• Knowledge of electrical characterization techniques for CMOS devices.
• Ability to manage complex process development projects, including schedules, budgets, and personnel.

What sets you apart

• Expertise in integration advanced packaging process flows like CoWoS, SoIC, InFO.
• Experience in contributing Process and equipment qualification data towards a full Semiconductor equipment PLC process
• Experience with advanced metrology/Inspection characterization techniques
• Strong communication skills to convey technical concepts clearly.

Job's mission

What you will be working on

• Researching, developing, and optimizing thin film deposition processes, with a focus on metal and dielectric films using PEALD and related technologies.
• Designing and executing complex experiments using Design of Experiments (DOE) and Response Surface Methodology (RSM), and interpreting experimental results.
• Developing new film materials and processes for emerging semiconductor applications based on strong chemistry and materials science fundamentals.
• Actively troubleshooting process and equipment issues through hands-on engagement.
• Participating in and driving structured technical problem-solving using scientific methodologies and industry tools.
• Collaborating with customers and central marketing to define requirements and execute customer demonstrations.
• Supporting product transfer to customers by delivering demonstrations, training field service teams, creating technical documentation, and traveling to customer sites (up to 10%).
• Authoring technical papers and contributing to intellectual property (IP) generation related to process and technology development.

What we are looking for

• PhD in Chemical Engineering, Materials Science, Electrical Engineering, Physics, or a related field or MS degree with 2+ years of relevant industry experience.
• Hands-on experience with PEALD, ALD, PECVD, CVD, Epitaxy, or other thin film deposition technologies.
• Strong understanding of thin film deposition principles and semiconductor process development.
• Experience designing and characterizing deposition processes using first principles and experimental design techniques.
• Ability to independently manage complex process development activities.
• Excellent communication skills in English and Korean, with the ability to clearly explain complex technical concepts.

What sets you apart

• Knowledge of electrical characterization techniques for CMOS devices.
• Experience integrating metal and/or dielectric films into FEOL and BEOL process flows.
• Hands-on experience with materials characterization techniques such as XPS, SIMS, AFM, XRD, TEM, SEM, Raman, or ellipsometry.
• Experience authoring technical publications and/or patents in the semiconductor industry.
• Strong collaboration skills with customers, field teams, and cross-functional stakeholders.

The Community You Will Join

It takes an entire team united behind something big. Together, we work hard, we laugh a lot, we brainstorm nonstop, and are passionate about the company and our values.

The Difference You Will Make

The Senior Marketing Manager, Korea will report to the Senior Marketing Lead, China & Korea and be based in Seoul. They will be responsible for supporting and implementing marketing programs to establish a strong brand voice and drive profitable growth, working collaboratively with cross-functional teams such as PR/communications, growth marketing, design, product marketing, public policy, legal and country leadership to bring marketing campaigns to life. In addition to exceptional discipline expertise and being highly detail-oriented, the successful candidate will demonstrate a natural disposition to hosting in their daily activities and a passion for creativity and design.

A Typical Day: 

• Partnering with the Senior Marketing Lead, develop local Korea marketing plans for greatest business and brand impact, in accordance with consumer understanding, seasonality, maximized earned media, community engagement, and brand health metrics.
• Execute cross-regional marketing initiatives. Demonstrate the ability to influence stakeholders in complex projects with tight timelines.
• Collaborate across functions, markets and regions, to develop highly effective, creatively excellent integrated marketing campaigns, including but not limited to: advertising, social, digital and experiential conception, development and production, media strategy, execution, optimization, and program reporting, ensuring all marketing activities feel local and personal.
• Lead the management of local agency partners, fostering best-in-class and highly productive agency partnerships.
• Enable and support localization, ensuring all marketing activities are locally relevant and personal, leveraging as possible existing strategies, content and plans for improved productivity.
• Manage analytics and reporting for brand health and marketing activities working closely with global and regional marketing, internal media teams, FP&A and marketing analytic teams.
• Organize and manage regular routines across disciplines. Ensure seamless flow of information between global, regional & local teams.
• Conduct and disseminate regular AARs (after action reviews) on projects including results, lessons learned and best practices to global, regional and local internal and external partners.
• Manage and track brand marketing budgets and ensure effective budget use, meeting or exceeding efficiency targets.
• Work with Korea & global finance and operations on budget forecasting and actualizing; ensuring timely SOWs and contracts with partners at all times; provide regular activity updates and reconciliations.

Your Experience

• 8+ years of relevant work experience at a start-up, agency or client-side marketing, with preference in the consumer internet space of travel, design, technology, or lifestyle brands.
• Strong understanding of and experience working closely with product and/or growth marketing.
• An integrated marketing mindset, passion for creative excellence in storytelling through multiple media types, both visual and written, with solid experience in brand and creative strategy, off- and online media, including social, paid media, SEM, measurement & analytics, project and agency management.
• Experience working in a regional team as part of a global organization and collaborating across geographies.
• Collaborative in approach, empathetic in nature, and steadfast in intention. 
• Appetite for a fast-paced environment and desire to constantly reassess and optimize.
• Excellent written and oral communication, a keen visual sense, attention to detail.
• Ability to work within tight deadlines, adjust quickly to changes in priorities, and balance short-term needs with long-term strategic initiatives. Ability to simplify is key!
• Passion for Airbnb, travel, creative and possessing an entrepreneurial spirit and strong problem solving skills.

Our Commitment to Inclusion & Belonging:

We are committed to working with the broadest talent pool possible. We believe diverse ideas foster innovation and engagement, enabling us to attract creatively-led people and develop the best products, services, and solutions. All qualified individuals are encouraged to apply.