Demo

Principal Mechanical Engineer

QuantumScape
San Jose, CA Full Time
POSTED ON 12/12/2025 CLOSED ON 12/21/2025

What are the responsibilities and job description for the Principal Mechanical Engineer position at QuantumScape?

Description: QuantumScape is on a mission to transform energy storage with solid-state lithium-metal battery technology. The company’s next-generation batteries are designed to enable greater energy density, faster charging and enhanced safety to support the transition away from legacy energy sources toward a lower carbon future.

What we need: Join us on our mission as we transform energy storage to enable a more sustainable future. We are looking to add a Principal Mechanical Design Engineer to our Cell Engineering and Manufacturing Development team. This individual will be responsible for designing and scaling QuantumScape’s unique solid-state lithium metal batteries for high volume production. This work includes designing new cell structures, encasings, components, and assembly tools in addition to methodologies to validate the fidelity of these new designs. You must have experience working with electrochemical energy storage devices such as lithium-based batteries or similar technology.


What You’ll do:

  • Lead in the design, development, and implementation of new solid-state Li-metal battery designs for manufacturing scale-up with cross functional teams
  • Utilize thermal and mechanical simulation to drive the detailed mechanical design of cell architecture to meet customer mechanical, thermal, and pack level integration requirements
  • Identify, specify, and set requirements with suppliers for cell components, assembly tools and manufacturing solutions for scale-up
  • Develop methodologies and experiments to validate key cell design performance, reliability, and safety criteria
  • Collaborate with cell build process teams, equipment design teams, safety, quality, metrology, and production teams to execute on critical path projects


Skills You’ll need:

  • BS or higher degree in mechanical engineering, material science, or similar concentration
  • Minimum of 10 years experience with a Bachelor’s degree, or minimum of 8 years experience with a Master’s degree
  • Proven experience driving mechanical design projects across the product life cycle, concept through production experience is preferred.
  • Expertise with at least one major CAD package ex: AutoDesk Inventor, SolidWorks, Catia, etc.
  • Expertise with mechanical & thermal simulation packages ex: ANSYS, ABAQUS, Comsol, etc.
  • Prior experience or knowledge of lithium-ion batteries is preferred


e Time

Principal Mechanical Engineer
Therma -
San Jose, CA
Principal Mechanical Engineer
Muon Space -
San Jose, CA
Principal Mechanical Engineer
muonspace -
San Jose, CA

Salary.com Estimation for Principal Mechanical Engineer in San Jose, CA
$197,913 to $232,737
If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Principal Mechanical Engineer?

Sign up to receive alerts about other jobs on the Principal Mechanical Engineer career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$158,725 - $194,124
Income Estimation: 
$119,658 - $160,028
Income Estimation: 
$197,917 - $247,739
This job has expired.
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at QuantumScape

  • QuantumScape San Jose, CA
  • Job Title: Metallurgy Engineer, Principal Member of Technical Staff Report To: Senior Director, R&D Location : Onsite At QuantumScape, we're transforming t... more
  • 13 Days Ago

  • QuantumScape San Jose, CA
  • Job Title: Principal Cell Development Engineer Report To: Director of Cell Development Location : Onsite About QS: QuantumScape is on a mission to revoluti... more
  • 14 Days Ago

  • QuantumScape San Jose, CA
  • Description: QuantumScape is on a mission to transform energy storage with solid-state lithium-metal battery technology. The company’s next-generation batt... more
  • 14 Days Ago

  • QuantumScape San Jose, CA
  • About QS: QuantumScape (NYSE: QS) is on a mission to revolutionize energy storage to enable a sustainable future. The company’s next-generation solid-state... more
  • 3 Days Ago


Not the job you're looking for? Here are some other Principal Mechanical Engineer jobs in the San Jose, CA area that may be a better fit.

  • Coherent Corp. Santa Clara, CA
  • Job Description Primary Duties & Responsibilities Work with internal customers to define the automated system specifications. Select the main components, s... more
  • 1 Month Ago

  • Advanced Micro Devices, Inc Santa Clara, CA
  • WHAT YOU DO AT AMD CHANGES EVERYTHING We care deeply about transforming lives with AMD technology to enrich our industry, our communities, and the world. O... more
  • 16 Days Ago

AI Assistant is available now!

Feel free to start your new journey!