Supplier Development Engineer

About Amprius!

Amprius Technologies, Inc. is a leading manufacturer of high-energy, high-power lithium-ion batteries, delivering the industry's highest commercially available energy density. Headquartered in Fremont, California, Amprius maintains an advanced R&D lab and a MWh-scale manufacturing facility dedicated to silicon anode and cell production. For more information about the company, please visit

Amprius Technologies is seeking an experienced Supplier Development Engineer that will be instrumental in ensuring the quality, capability, and reliability of our lithium-ion battery cell and component suppliers. This role involves deep collaboration with both internal engineering/quality teams and external supplier partners to develop, implement, and maintain world-class manufacturing processes and quality systems.

• Drive the selection, qualification, and ongoing development of suppliers for new battery cell chemistries and components
• Conduct on-site audits at potential and existing supplier facilities to assess manufacturing processes, quality management systems, and technical capabilities
• Lead the development and approval of APQP/PPAP packages to ensure components meet strict specifications
• Implement continuous improvement programs at supplier sites, utilizing tools such as Six Sigma, Lean Manufacturing, and SPC (Statistical Process Control)

• Lead supplier capacity analysis to drive in-depth, collaborative studies with key suppliers to identify bottlenecks, measure utilization, and establish clear scaling strategies.
• Validate long term capacity expansion plans to ensure manufacturing strategies align with demand forecasts, technology roadmaps, and quality requirements.
• Oversee manufacturing scale-up and qualification processes. Monitor pilot runs, execute successful ramp-ups, and ensure quality metrics are met before mass production
• Develop and implement robust manufacturing risk mitigation strategies with suppliers

• Work closely with Design Engineering to influence product design for manufacturability (DFM) and quality
• Serve as the primary technical liaison between Amprius and the supplier's engineering and quality teams
• Facilitate joint problem-solving activities using 8D methodology to quickly address and permanently resolve quality issues
• Prepare and present detailed reports on supplier performance, risk assessments, and development progress to internal stakeholders

• B.S. in Electrical Engineering, Chemical Engineering, Materials Science, or a related technical field
• 5+ years of experience in supplier development, quality engineering, or manufacturing engineering within the Lithium-Ion Battery sector (cell or pack level)

• Fremont, CA:
  This is an on-site job. Reliable commute or planning to relocate before starting work is required
• Work performed in an office environment and requires the ability to operate standard office equipment and keyboards

Ability to travel internationally up to 40% of the time to supplier sites in South Korea, United States, and Europe.

• Demonstrated expertise in quality tools (e.g., FMEA, MSA, SPC, DoE) and auditing standards (e.g., VDA, ISO 9001/IATF 16949). Experience with ISO 9001 and AS9100 quality standards
• Deep understanding of cell manufacturing processes (electrode coating, cell assembly, formation) or key battery components (anode/cathode materials, separators, electrolytes)
• Excellent communication, presentation, and interpersonal skills, with the ability to influence cross-functional teams and external partners
• Fluency in Korean is a plus, given the global supply chain
• Ability to travel internationally up to 40% of the time to supplier sites in South Korea, US, and Europe

• Comprehensive compensation package includes base salary + RSUs. Salary range for this role is $120,000 to $190,000. Base salary will be determined based on knowledge, experience, and education
• Health benefits include medical, dental and vision coverage. Medical options of HMO and PPO plans
• Em…