Peak Energy 

Job Title: Senior Cell Modeling & Analytics Engineer

Location: Broomfield, CO or Burlingame, CA

Department: Cell Engineering

Reports To: Cell Applications Engineering Manager

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.   

If you want to define how a new chemistry is tested, validated, and trusted at commercial scale — and to build the lab, fixtures, and methods that make that possible — we encourage you to apply and help us power a more sustainable future. 

About the Role - Senior Cell Modeling & Analytics Engineer

Peak Energy is seeking a Senior Cell Modeling & Analytics Engineer to develop the predictive models and data analytics that drive cell design, performance optimization, and life prediction for sodium-ion cells. The ideal candidate brings a deep understanding of battery failure mechanisms and applies that expertise across thermal and heat-generation modeling, equivalent circuit modeling, physics-based electrochemical modeling, and 3D battery modeling. In this role you will build models that predict battery life, characterize thermal behavior, and optimize performance, and you will analyze large sets of cell performance data to surface trends, anomalies, and optimization opportunities.

The successful candidate combines strong modeling and simulation skills with rigorous data analysis to create models that drive innovation and efficiency across our battery-powered products.

What You'll Do (Responsibilities)

• Develop, validate, and refine battery life models to predict cell life and performance under various operating conditions. 

• Develop thermal and heat-generation models at the cell level to characterize temperature distribution, heat rejection, and thermal behavior under operating and abuse conditions, and to inform cell and system thermal design. 

• Build and parameterize equivalent circuit models (ECMs) for cell performance prediction, state estimation (SOC/SOH), and integration into system-level and BMS simulations. 

• Develop physics-based models (e.g., electrochemical / pseudo-2D / Doyle-Fuller-Newman) to capture the underlying transport, kinetics, and degradation mechanisms that govern cell behavior and guide design decisions. 

• Build 3D battery models to simulate spatially resolved electrochemical, thermal, and mechanical behavior across cell geometries and formats. 

• Analyze large sets of battery performance data to identify trends, anomalies, and optimization opportunities and assess model accuracy. 

• Collaborate with cross-functional teams, including cell engineers and ESS engineers, to integrate battery data and models into broader product-level models and enhance battery performance in the ESS product. 

• Build and implement algorithms for advanced data analysis, using tools like Python. 

• Create and maintain comprehensive reports, visualizations, and dashboards to communicate findings and recommendations. 

• Assist in root-cause analysis on battery failures and contribute to improving product design and performance. 

• Continuously research advancements in battery technologies, modeling methods, and data science methodologies to improve current processes. 

What You'll Bring (Qualifications)

• Bachelor's or Master's degree in Engineering, Chemistry, Materials Science, Data Science, Computer Science, or a related field. 

• Minimum of 5 years of hands-on experience in battery modeling and battery data analysis. 

• Deep understanding of lithium-ion and/or sodium-ion battery technologies, including their failure mechanisms. 

• Hands-on experience with cell modeling approaches spanning thermal / heat-generation modeling, equivalent circuit modeling, and physics-based electrochemical modeling. 

• Proficiency in programming languages such as Python, with experience in data manipulation, physical modeling, statistical modeling, and machine learning. 

• Experience working with large datasets, performing statistical analysis, and using data visualization tools. 

• Strong problem-solving skills and the ability to interpret and analyze complex datasets. 

Preferred Qualifications

• PhD degree in Engineering, Chemistry, Materials Science, Data Science, Computer Science, or a related field. 

• Experience in the simulation of battery materials, electrodes, and cells. 

• Knowledge of electrochemical models and battery simulation tools (e.g., COMSOL, GT-AutoLion, PyBaMM, Simulink). 

• Experience developing 3D battery models for coupled electrochemical-thermal-mechanical simulation. 

• Experience in advanced battery data analysis, such as dQ/dV fitting and EIS modeling. 

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 $140,000 - $175,000, 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.