Test Engineer Intern, ESS (Summer 2027)

Location: Burlingame, California Department: ESS Engineering

Peak Energy

Role Title: Test Engineer Intern

Location: Burlingame, CA

Department: Engineering

Reports To: Senior Manager, Test Engineering

Position Type: Internship (Summer 2027)

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 – Test Engineer Intern

We are looking for a Test Engineer Intern to support our testing and functional verification efforts for our energy storage systems, from battery to power electronics. This role will work closely with design and simulation teams to understand needs, develop procedures, set up and run tests, and report on findings that directly inform the design direction of our products.

You will interface with design, simulation, and manufacturing engineering partners and gain hands-on experience across a fast-moving, early-stage energy company. Candidates should be available to begin employment in Summer 2027.

The ideal candidate is a self-starter who is hungry for knowledge, holds themselves and others to high standards, and brings a get-it-done attitude to every challenge — big or small.

What You'll Do

Conduct comprehensive testing of functional, high voltage, thermal, and mechanical systems across our energy storage products

Develop test strategies, plans, and procedures to evaluate key risks

Spearhead the design and acquisition of testing infrastructure

Collaborate with engineering teams to ensure design integrity and drive improvements

Analyze complex test data, report findings, and drive system enhancements

Identify, diagnose, and resolve intricate technical issues during testing

Perform root cause analysis on system failures and develop corrective and preventive actions

Drive innovation in testing methodologies and practices

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

Maintain detailed records of tests, analyses, and corrective actions; prepare reports and presentations for internal and external stakeholders

Drive and participate in a culture of rapid prototyping and automation

What You'll Bring

Working towards a Bachelor's degree in Mechanical Engineering, Electrical Engineering, Aerospace Engineering, or a related field

Experience in test engineering, preferably within battery storage or renewable energy sectors

Strong understanding of electromechanical engineering first principles

Proficiency in data processing and analysis tools

Excellent problem-solving skills with the ability to think critically and act decisively

Strong communication skills with the ability to present complex technical information clearly to both technical and non-technical stakeholders

Ability to work collaboratively in a fast-paced, dynamic environment

Proactive ownership mindset with a strong sense of accountability

Preferred Qualifications

Experience with battery systems, energy storage, or power electronics testing

Familiarity with automated test systems or rapid prototyping workflows

Background in reliability, abuse, or environmental stress testing

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 pay for this role is $35/hour.

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.