Sr. Sales Application Engineer, Battery

Job Title: Sr. Sales Applications Engineer, Battery

Job Type: Exempt, Full-time

Locations: Fremont, CA (On-site)

Reports to VP of Sales

Company Description

Amprius Technologies is a leading manufacturer of high-energy and high-capacity lithium-ion batteries, producing the industry’s highest energy density cells. We develop, design, and manufacture high-performance lithium-ion cells for advanced applications. We have invented and perfected a 100% silicon anode that enables the highest energy density cell commercially available in the industry. For more information, visit the company website at https://amprius.com/about/

Summary

We are seeking a Senior Sales Application Engineer, Battery, to bridge the gap between cutting-edge battery technologies and real-world customer applications. This customer-facing, high-impact role involves close collaboration with R&D, product development, and sales teams to deliver optimized energy solutions across aerospace, electric mobility, defense, and industrial sectors. Ultimately, you will work directly with our customers and provide support for our sales and product development teams as need.

Job Responsibilities

• Serve as the technical lead for customer integration of advanced battery cells and packs, including electrical, thermal, and mechanical system interfaces.
• Support OEMs and Tier 1 clients with battery performance validation, system-level troubleshooting, and application optimization.
• Lead DFMEA and safety assessments, ensuring compliance with safety and performance standards (UL, UN 38.3, SAE, etc.).
• Consult with customer engineering teams to ensure optimal and proper use of battery system design.
• Collaborate with manufacturing and quality teams to support design-for-manufacturability (DFM) and field issue resolution.
• Translate customer requirements into internal engineering specifications and guide product development accordingly.
• Conduct cell and pack-level simulations, lifetime modeling, thermal performance, and system performance projections under various duty cycles.
• Deliver technical documentation, including application notes, integration guides, and customer training materials.
• Participate in industry trade shows, technical conferences, and direct customer engagements as a subject matter expert.

Requirements

• Bachelor’s or Master’s in Electrical Engineering, Chemical Engineering, Mechanical Engineering, or related field.
• 5+ years of experience in battery applications, systems engineering, or electrochemical device integration.
• Expertise in Li-ion battery technology, BMS, and battery pack architectures. Experience with Silicon-anode or next-gen battery cells experience preferred.
• Proficiency in modeling tools such as MATLAB/Simulink, COMSOL, or equivalent simulation platforms.
• Strong knowledge of battery safety protocols, compliance testing, and thermal/electrical management strategies.
• Exceptional communication skills to translate complex technical concepts into customer-facing deliverables.
• Ability to work in fast-paced, cross-functional startup environments and support rapid product iteration cycles.
• Preferred Experience
• Experience working with aviation, UAV, EV, or space-based battery applications.
• Hands-on lab experience with battery cycling, testing platforms, and diagnostic equipment.
• Familiarity with DOE, Six Sigma, or statistical design/validation methodologies.

Physical Demands & Work Location:

• 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 ability to operate standard office equipment and keyboards
• Ability to lift and/or move objects up to 25 pounds.
• May need to wear personal protective equipment (PPE) including, but not limited to, a lab coat, gloves, safety glasses, face mask, respirator and safety shoes.

Travel Requirements:

• Frequent domestic and infrequent international travel.

Benefits

• Comprehensive compensation package includes base salary + generous RSUs. Salary range for this role is $125,000 - $175,000 annually DOE.
• Health benefits include medical, dental, and vision coverage. 100% employer-paid medical plan available. 
• Employer-funded Health Reimbursement Account (HRA). HSA compatible Medical Plan, FSA options.
• Commuter Benefits.
• Life and AD&D, Short & Long-term Disability, Employee Assistance Program, Mental Health support. 
• Voluntary Coverage Package to support your wellness goals.
• Pet Health Insurance (Dogs & Cats).
• Traditional and Roth 401(k). No match.
• Generous Vacation Leave starting with 3 weeks of annual accrual. 10 paid holidays. Sick time off.
• Cell phone reimbursement for $50/month

Amprius Technologies is committed to promoting an equal employment opportunity workplace environment and is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expressions, pregnancy, age, national origin, disability status, genetic information (GINA), protected veteran status, or any characteristic protected by law. The Company’s policy is to recruit, hire, train, promote, and administer all employment-related matters based on an individual’s qualifications, abilities, and efforts without regard to protected status.