Description
Job Title: Test Engineer, ESS
Location: This role will be based in Sacramento, CA. During the first 3–6 months, the position will be based in our Burlingame, CA headquarters for onboarding before transitioning permanently to Sacramento.
Department: ESS Engineering
Reports To: Senior Manager, Test Engineering
Position Type: Full-time
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, ESS
We are looking for a Test Engineer to support our testing and functional verification efforts for our energy storage systems, from battery to power electronics. This role works closely with design and simulation teams to understand risks, develop procedures, set up and run tests, and report on findings that directly inform the design direction of our products.
You will interface tightly with design, simulation, and manufacturing engineering partners across a fast-moving, early-stage energy company. This role sits at the intersection of technical rigor and rapid iteration, with a direct impact on product safety, reliability, and performance.
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. We are open to all levels.
What You'll Do
- Lead and conduct comprehensive testing of functional, thermal, electrical (HV/LV), and mechanical systems across our energy storage products
- Develop test strategies, plans, and procedures to evaluate key risks against performance, reliability, abuse/safety, and functional requirements
- Spearhead the design and acquisition of testing equipment and 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
- Bachelor's degree in Mechanical Engineering, Electrical Engineering, Aerospace Engineering, or a related field
- 1–4+ years of experience in test engineering, preferably within battery storage or renewable energy sectors; includes relevant internships and student group projects
- 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 salary range for this role is $150,000–$215,000, with actual pay varying based on work location, experience, and skills. 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 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.
Similar jobs
Est. 177,500 USD
Job Title: Test Engineer, ESS Location: Burlingame, CA Department: Engineering Reports To: Senior Manager, Test Engineering Position Type: Full-time About Peak Energy Peak Energy is the first American venture to advance…
Est. 182,500 USD
Job Title: Lead Test Engineer, ESS Location: This role will be based in Sacramento, CA. During the first 3–6 months, the position will be based in our Burlingame, CA headquarters for onboarding before transitioning perma…
Est. 72,880 USD
Intern Location: Burlingame, CA Department: Engineering Reports To: Senior Manager, Test Engineering Position Type: Internship (Winter 2027) About Peak Energy Peak Energy is the first American venture to advance globally…
Est. 120,000 USD
About the Company: 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, rea…
Est. 205,000 USD
Job Title: Staff Reliability Engineer Location: Burlingame, CA Department: ESS Engineering Reports To: Staff Reliability Engineer Position Type: Full-time About Peak Energy Peak Energy is the first American venture to ad…
Est. 62,400 USD
About the Job Peak Energy is looking for a Mechanical Design Intern to join our Energy Storage Systems (ESS) team and work on mechanical designs of our utility scale sodium-ion energy storage systems (ESS). You will be s…
Est. 72,880 USD
About the Job Peak Energy is looking for a Mechanical Design Intern to join our Energy Storage Systems (ESS) team and work on mechanical designs of our utility scale sodium-ion energy storage systems (ESS). You will be s…
Est. 60,000 USD
About the Company: 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, rea…
Est. 95,000 USD
Job Title: Controls and Automation Engineer Location: Burlingame, CA Department: Manufacturing Engineering Position Type: Full Time Compensation: About the Company Peak Energy is the first American venture to advance glo…
Est. 124,000 USD
Peak Energy Job Title: Systems Integration and Test Engineer Location: Burlingame, CA Department: ESS Engineering Reports To: Senior Manager, Test Engineering Position Type: Full-time About the Company: Peak Energy is th…
Est. 145,000 USD
Peak Energy Job Title: Project Development Manager Location: Burlingame, CA Department: Commercial (Projects) Reports to: Director of Development Position Type: Full Time About Peak Energy Peak Energy is the first Americ…
Est. 124,000 USD
Peak Energy Job Title: Manufacturing Software Engineer Location: Burlingame, CA or Sacramento, CA Department: Manufacturing Engineering Reports To: Software Engineering Manager Position Type: Full-time About Peak Energy…
Est. 217,500 USD
Peak Energy Job Title: Controller Location: Broomfield, CO Department: Finance Reports To: VP of Finance Position Type: Full-Time About Peak Energy Peak Energy is the first American venture to advance globally proven Sod…
Est. 115,000 USD
Peak Energy Job Title: Sales Engineer Location: Burlingame, CA (Preferred) or Broomfield, CO Department: Commercial (Projects Team) Reports to: Director of Project Engineering Position Type: Full-time About the Company P…
Est. 207,500 USD
Job Title: Commercial Counsel Location: Burlingame, CA Department: Legal Reports to: VP of Legal Position Type: Full Time About Peak Energy Peak Energy is the first American venture to advance globally proven Sodium-Ion…
Est. 185,000 USD
Peak Energy Role: Senior Director of Manufacturing Location Burlingame, CA (with significant time at Sacramento, CA manufacturing facility) Department Manufacturing Reports To VP of Manufacturing Position Type Full-time…
Est. 120,000 USD
Peak Energy Job Title: Project Engineer Location: Burlingame, CA or Broomfield, CO Department: Commercial (Projects Team) Reports to: Chief Strategy Officer Position Type: Full-time About the Company Peak Energy is the f…
Est. 144,000 USD
Peak Energy Job Title: Senior Cell Validation & Reliability Engineer Location: Burlingame, California Department: Cell Engineering Reports To: Cell Applications Engineering Manager Position Type: Full-time About Peak…
Est. 80,000 USD
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…
Est. 175,000 USD
Job Title: Sr. Staff Technical Program Manager, ESS Location: San Francisco Bay area, CA Department: ESS Engineering Reports to: CTO Position Type: Full-time About the Company Peak Energy is the first American venture to…
ON.energy is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resil…
Est. 95,000 USD
ON.energy is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resil…
Est. 140,000 USD
Peak Energy Job Title: Staff Power Systems Engineer Location: Burlingame, CA Department: Energy Storage System (ESS) Engineering Reports To: Senior Systems Engineer Position Type: Full-time About Peak Energy Peak Energy…
Est. 120,000 USD
Do you want to work with high-caliber professionals in a dynamic and growing company? Are you entrepreneurial, hard-working, and collegial? Join us at SB Energy, a leading infrastructure company backed by SoftBank Group…
Est. 110,000 USD
ON.energy is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resil…
Est. 175,000 USD
Do you want to work with high-caliber professionals in a dynamic and growing company? Are you entrepreneurial, hard-working, and collegial? Join us at SB Energy, a leading infrastructure company backed by SoftBank Group…
Est. 140,000 USD
ON.energy is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resil…
Est. 144,000 USD
ON.energy is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resil…
Est. 250,000 USD
Peak Energy Job Title: Head of Hardware Location: Burlingame, CA Department: ESS Engineering Reports To: CTO Position Type: Full-time About Peak Energy Peak Energy is the first American venture to advance globally proven…
Est. 167,500 USD
What The Role Is Reporting to the Sr. Manager of BESS Engineering, the Principal Battery Energy Storage System (BESS) Engineer (or Battery Energy Storage System Manager) is responsible for preliminary engineering, fire s…