Performance Engineer Intern Jobs in California (NOW HIRING)

Peak Energy 

Job Title: Systems Integration and Test Engineering Intern 

Location: Burlingame, CA 

Department: ESS Engineering 

Reports To: Senior Manager, Test Engineering 

Position Type: Internship (Winter 2027 Term) 

About Peak Energy 

Peak Energy is the first American venture to advance globally proven Sodium-Ion battery systems as the storage standard for the new era of renewable energy on a resilient grid. 

Sodium-Ion is cheap, readily available and safe, making it the leading contender in a rapidly evolving market. 

Our leadership team is powered by decades of expertise in scaling gigawatt-level innovation at world-class companies such as Tesla, Northvolt, Apple, Powin, Enovix, Zipline, Solid Power, and Fluence. We are backed by strategic investment and product partners such as TDK Ventures and Eclipse Ventures. 

We are a team of engineers, operators, entrepreneurs, and partners driven by a shared ambition to set the new performance standard for renewable energy and grid resilience. 

About the Role - Systems Integration and Test Engineering Intern 

This intern will support integration testing and functional verification of Peak Energy's energy storage systems, working across BMS, inverters, and other systems from batteries to power electronics. 

As Peak Energy scales its ESS testing infrastructure, this role helps build out the benchtop and HIL test capabilities needed to validate systems ahead of production. 

You'll work closely with firmware, design, and simulation teams, gaining exposure to the full test lifecycle - from procedure development to execution to reporting. 

This role suits a hands-on, curious engineer who's eager to learn by doing and comfortable navigating ambiguity in a fast-moving startup environment. 

What You'll Do (Responsibilities) 

• Support functional testing of BMS, inverters, and other systems across Peak Energy's energy storage product 

• Help design, set up, and run benchtop and HIL test setups for validation of the BMS 

• Develop and execute test scripts to support test automation efforts 

• Assist in developing test plans and procedures across electrical and mechanical systems 

• Interface with design, simulation, and manufacturing engineering partners to inform design decisions 

• Help analyze test data and document findings for engineering teams 

• Support troubleshooting and diagnosis of issues identified during testing 

• Participate in a culture of rapid prototyping and testing 

What You'll Bring (Qualifications) 

• Pursuing a Bachelor's or Master's degree in Electrical Engineering, Computer Engineering, or a closely related field 

• Experience interfacing with microcontrollers and writing scripts for functional testing 

• Basic familiarity with electromechanical test setups 

• Proficiency in Python or similar 

• Strong analytical and problem-solving skills 

• Comfortable working hands-on with hardware and lab equipment 

• Passion for renewable energy, sustainability, and driving positive environmental impact through technology innovation 

• Eligible to work in the U.S. 

Preferred Qualifications 

• Exposure to high voltage battery and power electronics systems 

• Familiarity with battery management systems (BMS) architecture 

• Coursework or project experience with hardware-in-the-loop (HIL) test systems 

Peak Energy is committed to building a diverse and inclusive workforce. We strongly encourage women, people of color, and individuals from underrepresented groups to apply. We value skills, potential, and perspective over specific credentials. If you're excited about this role but your experience doesn't look perfect on paper, we still want to hear from you. 

Our Core Values 

• Speed Through Focus - Move fast but understand why. Focus on the goal, don't sacrifice quality. 

• Mission Over Self - It's about the greater good; confident humility. Take ownership and accountability. 

• Face the Brutal Truth - Transparency, honesty, big picture curiosity. Fearless decision making. 

• Be a Good Person - Kindness, collaboration and teamwork. 

Compensation & Benefits 

The hourly rate for this role is $35/hr. Join us to thrive in a supportive environment while making a meaningful impact in the energy sector! 

At Peak Energy Technologies Inc., we believe that a diverse and inclusive workplace makes us a more capable, innovative, and competitive company. We welcome people who represent diversity in their backgrounds, ethnicities, cultures, and experiences. Peak Energy Technologies Inc. is an equal opportunity employer, aiming to reach our company's full potential by cultivating an inclusive workforce. We do not discriminate on the basis of race, color, ancestry, religion, national origin, sexual orientation, citizenship, marital or family status, disability, gender identity or expression, veteran status, or any other legally protected status.