Senior Test Engineer, Energy Storage Systems

Join Our Team as a Senior Test EngineerAt Peak Energy, we are at the forefront of innovation in energy storage solutions. We are seeking a dedicated Senior Test Engineer to spearhead our testing and functional verification initiatives for our cutting-edge energy storage systems, ranging from batteries to power electronics.In this role, you will collaborate c…

About the Role:We are seeking a dedicated Staff Test Engineer to enhance our testing and functional verification initiatives for our cutting-edge energy storage systems, encompassing everything from battery technology to power electronics. This pivotal position will involve close collaboration with design and simulation teams to assess risks, develop testing protocols, execute tests, and report findings critically. By conducting thorough risk assessments, tests, and data analysis, you will significantly influence the design trajectory of our products. Ideal candidates are proactive, eager to learn, and uphold high standards of excellence.

About the Role:We are seeking a passionate and driven Test Engineer Intern to spearhead our testing and functional verification initiatives for our innovative energy storage systems, which encompass both battery technologies and power electronics. In this role, you will collaborate closely with our design and simulation teams to grasp their requirements, develop testing procedures, execute tests, and ultimately compile comprehensive reports on test outcomes. Your testing efforts will significantly influence the product design direction. We are looking for a proactive individual who is eager to learn and upholds high standards in their work.Candidates must be available to start their internship in Fall 2026.

About the Company:Peak Energy is pioneering the adoption of Sodium-Ion battery systems in the U.S., setting a global standard for energy storage in the new renewable energy era. Our innovative approach prioritizes affordability, safety, and accessibility, positioning Sodium-Ion as the market leader in a rapidly evolving landscape.Our leadership team boasts decades of experience in scaling innovative energy solutions at renowned companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are supported by strategic investors and partners including TDK Ventures and Eclipse Ventures.We are a diverse team of engineers, operators, and entrepreneurs united by a common goal: to redefine performance benchmarks for renewable energy and enhance grid resilience.

Job Title: Lead Functional Systems Engineer for Energy Storage Solutions Location: Burlingame, CA Department: ESS Engineering Reports to: CTO Position Type: Full Time About Peak Energy: Peak Energy is pioneering the advancement of Sodium-Ion battery systems as the future standard for renewable energy storage on resilient grids. Our technology is not only cost-effective and readily available, but it also prioritizes safety, positioning us as leaders in a rapidly evolving sector. Our executive team brings decades of experience from industry giants such as Tesla, Northvolt, SunPower, Fluence, and Enovix, and we are supported by strategic investors, including TDK Ventures and Eclipse Ventures. About the Role: We are looking for a dynamic Functional Systems Lead to take charge of the system-level architecture, requirements, and integration across our embedded software, electrical systems, and controls for innovative energy storage products. This role is pivotal at the intersection of embedded systems, electrical engineering, and system modeling, ensuring our offerings are safe, reliable, and efficient from the cell to the grid. In this position, you will be responsible for defining functional requirements, system behavior, and safety architecture while collaborating closely with embedded, hardware, and modeling teams. You may also oversee the development of embedded software for critical safety functions. This is a hands-on leadership role well-suited for a candidate who excels in ambiguous situations and desires to influence both product and engineering trajectories.

About This Position Peak Energy is actively seeking a skilled Systems Engineer to be instrumental in the design and implementation of our innovative battery energy storage systems. This pivotal role encompasses all facets of product development, including design, modeling, integration, testing, manufacturing, and field operations. As a Systems Engineer, you will ensure that both the design and the finalized product align with the company’s standards and customer expectations. This position demands a collaborative spirit, robust technical acumen, and exceptional interpersonal skills, all of which contribute to the overall success of our product offerings. The ideal candidate will possess a solid grounding in battery technologies and engineering principles, outstanding communication abilities, and a strong commitment to Peak’s mission of promoting sustainable energy solutions.

Join Our Team!Peak Energy is on the lookout for a talented and motivated Embedded Software Engineer to be a key player in our Energy Storage Systems (ESS) team. In this role, you will contribute to the innovation and development of our cutting-edge gigawatt-scale sodium ion energy storage system, driving advancements in sustainable energy technology.

About the RolePeak Energy is seeking a passionate Mechanical Design Intern to join our Energy Storage Systems (ESS) team. In this role, you will contribute to the mechanical design of our innovative utility-scale sodium-ion energy storage systems. You will collaborate with cross-functional teams in design, analysis, manufacturing, and testing to bring your ideas to life. We are looking for an enthusiastic individual who is eager to learn and engage in hands-on projects.Key Responsibilities:Contribute to the design of essential components, focusing on areas such as module enclosures, adhesives, plastic parts design, high current conductors, and communication harnessing.Collaborate closely with thermal and structural analysts as well as other design teams to ensure informed design decisions.Engage in the iterative design process, testing, and refining mechanical systems to enhance performance and reliability.Assist in the documentation and presentation of design concepts and solutions.

Position OverviewJoin Peak Energy as a Senior Staff Reliability Engineer, where you will play an integral role in enhancing the reliability of our Energy Storage Systems (ESS) hardware, specifically focusing on high-voltage electronics, devices, and power conversion systems. In this pivotal position, you'll collaborate across various departments to ensure industry-leading reliability throughout the entire product life cycle, from initial concept through to field deployment. Your expertise in reliability engineering will be applied in a dynamic, hands-on environment, enabling you to make significant contributions across design architecture, testing, manufacturing, and field operations.Core ResponsibilitiesTake ownership of the reliability of subsystems for current and upcoming products, emphasizing high-voltage electronics and power conversion technologies.Develop and execute comprehensive reliability testing programs, including Design Verification (DV), Production Validation (PV), and Operational Readiness Testing (ORT), leading Failure Mode and Effects Analysis (DFMEA), defining mission profiles, analyzing test acceleration, and specifying test requirements.Create and enhance custom Python tools for reliability analysis and modeling, automating workflows for life prediction, test design, and data management.

About the RoleWe are excited to invite applications for the position of Manufacturing Shift Lead. In this pivotal role, you will oversee the daily production operations of our Energy Storage Systems. Your responsibilities will include coordinating technicians during shifts, ensuring adherence to manufacturing processes, and delivering safe, top-quality output according to production plans.The Shift Lead position is a working leadership role. You will be actively present on the production floor, hands-on as needed, and accountable for executing tasks effectively. Responsibilities include labor and resource allocation, monitoring performance against production plans, and serving as the first line of escalation for any quality, safety, or throughput issues. This role is essential as Peak Energy transitions from pilot builds to scalable, repeatable energy storage systems manufacturing.

About the Company:Peak Energy is a pioneering American enterprise focused on deploying globally recognized Sodium-Ion battery systems as the future of energy storage, designed to support a resilient renewable energy grid.Sodium-Ion technology is affordable, abundantly available, and exceptionally safe, making it a leading choice in the dynamic energy market.Our leadership team boasts decades of experience in scaling innovative gigawatt solutions at renowned companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are supported by strategic investments from partners like TDK Ventures and Eclipse Ventures.We are a dedicated team of engineers, operators, entrepreneurs, and collaborators, united by a common goal to redefine the performance benchmarks for renewable energy and grid stability.About the Job:Peak Energy is searching for a Staff Thermal Analyst specializing in Energy Storage Systems (ESS) to contribute to the advancement of our gigawatt-scale energy storage solutions. This role will involve making key thermal design decisions spanning architecture, optimization, and validation. The successful candidate will collaborate with design and manufacturing partners, as well as external stakeholders, to facilitate engineering trade-offs and provide expert guidance. A solid foundational knowledge paired with a proactive and solution-oriented mindset is essential for success in this role.

Join Our Team as an Embedded Software Engineer Peak Energy is on the lookout for a talented Embedded Software Engineer to enhance our Energy Storage Systems (ESS) team. You will play a pivotal role in developing our innovative gigawatt-scale sodium-ion energy storage solutions. This is an exciting opportunity to contribute to cutting-edge technology in a dynamic industry.

About the Job Join Peak Energy as a Project Finance Manager, where you will play a critical role in shaping our investment strategies and financial models. In this hands-on position, you will be responsible for developing project-level financial models that are instrumental in guiding investment decisions, financing negotiations, and evaluating partnership economics across our diverse portfolio. You will collaborate closely with our Chief Strategy Officer and CEO, ensuring that your work is presented to institutional investors, strategic partners, tax credit buyers, and lenders. This position is designed for high-impact contributions, directly influencing our capital allocation and strategic direction. You will be part of a seasoned team with extensive expertise in energy storage, project development, and finance. We offer competitive compensation that reflects your experience and includes equity participation in a pioneering company at the forefront of the energy storage revolution and sodium-ion battery commercialization.

About the Internship:Join Peak Energy as an Electrical Engineering Intern for the summer of 2026! In this exciting role, you will contribute to the design, development, and validation of innovative electrical systems within our cutting-edge energy storage platforms, which encompass battery systems, power electronics, and control hardware. Collaborate closely with cross-functional teams, including design, firmware, and testing, to gain a comprehensive understanding of system requirements, assist in hardware development, support lab validation, and drive engineering enhancements.This internship offers a unique opportunity to engage in hands-on engineering work, directly impacting product development and influencing design decisions. We seek motivated individuals who are eager to learn, maintain high standards, and thrive in a collaborative environment.

About the Job:Peak Energy is looking for a skilled and detail-oriented Senior Manufacturing Design Engineer to join our innovative engineering team. In this critical role, you will lead the design, development, and optimization of manufacturing equipment and tooling to facilitate efficient production processes. Your focus will be on equipment design, driving the introduction of new machinery, automation systems, and enhancements to our production lines. You will work collaboratively with cross-functional teams to ensure that your designs meet production requirements, adhere to safety standards, and achieve operational efficiency.

Join Peak Energy as an Engineering Finance Analyst!At Peak Energy, we are dedicated to accelerating the transition to clean and reliable energy through innovative energy storage solutions. As an Engineering Finance Analyst, you will collaborate with our engineering, manufacturing, and supply chain teams to drive cost initiatives as we scale our manufacturing operations. Your expertise will help establish cost targets, develop and manage internal cost models, and support capital planning while contributing to our product roadmap.This role reports directly to the Vice President of Finance and marks the first engineering finance position in our growing team.

Peak Energy is building Sodium-Ion battery technology designed for grid-scale energy storage. The company aims to deliver batteries that are safe, affordable, and accessible. The leadership team brings experience from organizations such as Tesla, Northvolt, SunPower, Fluence, and Enovix. Investors and partners include TDK Ventures and Eclipse Ventures. Role overview This Manufacturing Equipment Engineer position is based in Burlingame, CA and reports to the Manufacturing Equipment Engineering Manager. The role sits within the Manufacturing Engineering department and is a full-time opportunity. What you will do Lead the design, deployment, and optimization of manufacturing equipment for both current operations and future facility expansions. Oversee the setup of production lines at the Sacramento site, managing projects from concept and Design for Manufacturability (DFM) through vendor engagement, installation, commissioning, and validation. Design and implement advanced manufacturing equipment and tools to support efficient, scalable production processes. Introduce new machinery and automation systems, and drive improvements to existing production lines to meet production goals and safety standards. Ensure all equipment meets operational efficiency targets and regulatory requirements. Serve as the main point of contact for equipment-related projects, collaborating with process, quality, design, and manufacturing teams. Contribute directly to building production capacity toward the company’s target of 1 GWh for Energy Storage Systems by 2027.

About Peak Energy Peak Energy develops Sodium-Ion battery systems for renewable energy storage. As the first American company to promote these systems globally, Peak Energy focuses on making energy storage affordable, widely available, and safe. The leadership team brings experience from Tesla, Northvolt, and SunPower, and the company is backed by investors including TDK Ventures and Eclipse Ventures. Engineers, operators, and entrepreneurs at Peak Energy work together to improve grid resilience and renewable energy performance. Role Overview The Senior Manufacturing Quality Engineer will take the lead in building quality engineering practices at Peak Energy’s Burlingame, California location. This role sets up foundational quality systems, implements PFMEA and in-process quality controls, and manages supplier and incoming component quality. Collaboration with engineering, operations, and leadership teams is central to defining standards and processes that ensure the safety and reliability of battery systems for customer deployment.

About the Role:As a Techno-Economic Product Manager at Peak Energy, you will play a crucial role in shaping the future of renewable energy storage solutions. You will lead cross-functional projects focused on advancing Sodium-Ion battery technology, collaborating with engineers, product developers, and stakeholders to drive innovation. Your expertise will help in formulating strategies for product development, market analysis, and customer engagement.Key Responsibilities:Conduct techno-economic analyses to evaluate product feasibility and market potential.Collaborate with the engineering team to refine product specifications and ensure alignment with market needs.Engage with customers and partners to gather feedback and insights for product enhancements.Monitor industry trends and competitor activities to inform strategic decisions.

Core Values at Peak Energy:Speed Through Focus: Execute priorities swiftly while minimizing distractions.Mission Over Self: Elevate the company's mission and collective success above personal interests.Face the Brutal Truth: Embrace honesty to facilitate informed decision-making.Be a Good Person: Foster a respectful and ethical workplace.About Peak Energy:Peak Energy is pioneering the deployment of Sodium-Ion battery systems, establishing them as the benchmark for renewable energy storage in the evolving energy landscape. Our Sodium-Ion technology is not only cost-effective and abundant but also positions itself as a frontrunner in a rapidly changing market.Our leadership team comprises seasoned professionals with extensive experience in scaling innovative solutions at leading companies such as Tesla, Northvolt, SunPower, Fluence, and Enovix. We are supported by strategic investors including TDK Ventures and Eclipse Ventures.