Test Engineer Intern, ESS (Fall 2026)
Peakenergy · Burlingame, California · Posted Jun 18, 2026
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Job Title: Test Engineer Intern
Location: Burlingame, CA
Department: Engineering
Reports To: Senior Manager, Test Engineering
Position Type: Internship (Fall 2026)
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 Fall 2026.
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 $30/hour. Our competitive benefits package includes:
Flexible time off
Comprehensive medical, dental, and vision coverage
Strong 401(k) plan
Equity opportunities
Many great work perks
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 re…