Battery Cell Test Engineer II

About Rivian Rivian is on a mission to keep the world adventurous forever. This goes for the emissions-free Electric Adventure Vehicles we build, and the curious, courageous souls we seek to attract. As a company, we constantly challenge what's possible, never simply accepting what has always been done. We reframe old problems, seek new solutions and operate comfortably in areas that are unknown.

Our backgrounds are diverse, but our team shares a love of the outdoors and a desire to protect it for future generations. Responsibilities Execute lithium-ion battery cell tests including electrical, mechanical, and electrochemical testing. Define SOP, prioritize tests, track and communicate test status to different groups of cell engineers and scientists. Write test scripts and set up program to run tests automatically with different cyclers and chambers.

Collaborate with data engineers to process data, maintain cell testing database and develop automated data post-processing and report generation scripts. Analyze and present test results to cell engineers and scientists and support cross functional teams with test report if needed. Contribute to automating the entire testing process from test requests to delivery of test results report. Work closely with test engineers and technicians to plan and execute long/medium/short-term priorities.

Develop and implement lab KPIs, using scripts, to analyze lab operation and improve productivity. Design test fixture to improve testing capability and accuracy and extract representative and meaningful data. Collaborate with equipment vendors to source and integrate external systems to Rivian cell testing lab. Maintain lab space and equipment, perform equipment calibration and troubleshooting as needed. Qualifications Must have: MS degree in an engineering discipline with experience in testing of lithium-ion battery cells/packs.

Good understanding of cell performances metrics and how to evaluate them with testing and other analysis. Good understanding of electrochemical processes in various lithium-ion chemistries. Experience in python and SQL database, capable to write scripts. Excellent attention to detail and critical thinking. Problem solving skills, outside of the box thinking and proactivity. Desire to work in fast-paced environment and willing to make an extra effort to get the job done.

Passionate about research/work in lithium-ion batteries, especially for EV application. Excellent communication and presentation skills. Nice to have:
Familiar with CAN, module/pack testing. Familiar with cell teardown, CT scan and other lithium-ion battery analysis methodologies and tools. Pay Disclosure The salary range for this role is USD 85, for California based applicants. This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting. An employee's position within the salary range will be based on several factors including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, geographic location, shift, and organizational needs.

The successful candidate may be eligible for annual performance bonus and equity awards. We offer a comprehensive package of benefits for full-time and part-time employees, their spouse or domestic partner, and children up to age 26, including but not limited to paid vacation, paid sick leave, and a competitive portfolio of insurance benefits including life, medical, dental, vision, short-term disability insurance, and long-term disability insurance to eligible employees.

You may also have the opportunity to participate in Rivian's 401(k) Plan and Employee Stock Purchase Program if you meet certain eligibility requirements. Full-time employee coverage is effective on their first day of employment. Part-time employee coverage is effective the first of the month following 90 days of employment. More information about benefits is available at  You can apply for this role through  (or through inte if you are a current employee).

This job is not expected to be closed any sooner than May 20, 2026. Equal Opportunity Rivian is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, ancestry, sex, sexual orientation, gender, gender expression, gender identity, genetic information or characteristics, physical or mental disability, marital/domestic partner status, age, military/veteran status, medical condition, or any other characteristic protected by law.

Rivian is committed to ensuring that our hiring process is accessible for persons with disabilities. If you have a disability or limitation, such as those covered by the Americans with Disabilities Act, that requires accommodations to assist you in the search and application process, please email us at candi…