Test Engineer

Peak Energy•Burlingame, CA

About The Position

Peak Energy is seeking a Test Engineer to support testing and functional verification of energy storage systems, from batteries to power electronics. The role works with design and simulation teams to understand risks, develop procedures, set up and conduct tests, and report findings that inform product design. It partners closely with design, simulation, and manufacturing engineering in a fast-moving, early-stage energy company, contributing directly to product safety, reliability, and performance. The company is open to candidates at all levels. Peak Energy develops sodium-ion battery systems for renewable energy storage and grid resilience. The company describes its technology as affordable, widely available, and safe, and is backed by strategic investment and product partners including TDK Ventures and Eclipse Ventures. The role is based in Burlingame, California, within ESS Engineering, and reports to the Senior Manager, Test Engineering. Compensation is listed as $150,000–$215,000, with actual pay varying by work location, experience, and skills. Benefits include flexible time off, medical, dental, and vision coverage, a 401(k) plan, equity opportunities, and other work perks. Peak Energy emphasizes inclusion, accountability, collaboration, and valuing skills and potential alongside credentials.

Requirements

Bachelor’s degree in Mechanical Engineering, Electrical Engineering, Aerospace Engineering, or a related field.
1–4+ years of test engineering experience; relevant internships and student group projects are included. Experience in battery storage or renewable energy is preferred.
Strong understanding of electromechanical engineering first principles.
Proficiency in data processing and analysis tools.
Strong problem-solving skills, including critical thinking and decisive action.
Strong communication skills and ability to clearly present complex technical information to technical and non-technical stakeholders.
Ability to work collaboratively in a fast-paced, dynamic environment.
Proactive ownership mindset and strong sense of accountability.

Nice To Haves

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.

Responsibilities

Lead and conduct comprehensive functional, thermal, electrical (HV/LV), and mechanical testing across energy storage products.
Develop test strategies, plans, and procedures to evaluate risks against performance, reliability, abuse/safety, and functional requirements.
Lead 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 technical issues during testing.
Conduct root cause analysis on system failures and develop corrective and preventive actions.
Improve testing methodologies and practices.
Work with design, simulation, and manufacturing engineering partners to inform design decisions.
Maintain detailed records of tests, analyses, and corrective actions, and prepare reports and presentations for internal and external stakeholders.
Drive and participate in a culture of rapid prototyping and automation.