Battery Algorithm Engineer

Company Overview

Founded in 2013, Iontra is a deep-tech Colorado-based fabless semiconductor and software solutions company that dramatically improves charge speed, cycle life, capacity utilization, cold weather charging, and safety of all Lithium batteries. The company has offices in Denver, CO, Dallas, Texas, and Bangalore, India. To learn more, visit iontra.com. This is a full-time, hands-on role in a fast-paced startup environment.

Position Summary

The Algorithm R&D Group at Iontra is seeking a Battery Algorithm Engineer with strong expertise in electrochemistry, mathematical modeling, and algorithm development for lithium-ion and emerging battery technologies. This person will design, implement, and optimize charging, discharging, and state-estimation algorithms to advance Iontra’s battery performance capabilities. The role requires hands-on data analysis, modeling, and simulation work, as well as collaboration with software, hardware, and test engineering teams to translate research outcomes into product-ready solutions.

Your work will directly impact Iontra’s mission to deliver safer, faster-charging, and longer-lasting batteries for applications ranging from consumer electronics to electric vehicles and grid storage.

What You’ll Be Doing:

• Further develop lithium-ion battery charging and discharging strategies within the company’s existing algorithm framework and evaluate the impact of various strategies on battery aging.
• Collaborate closely with the embedded systems and software teams to enhance the fuel gauge (SOC/SOH) estimation algorithms within the company’s established framework and integrate these algorithms with charging/discharging strategies into the battery management system (BMS) implemented on chips, to meet customer product requirements.
• Design and executed experiments with Iontra’s battery cyclers (Deimos and Phobos) to validate algorithm performance.
• Optimize the company’s existing cell characterization methods and extract and analyze large sets of test data.
• Work closely with cross-functional teams (Analytics, hardware, embedded software) to bring R&D concepts into production-ready code.
• Contribute technical documentation, patents and design reviews.

You’ll Need These Qualifications:

• MS or PhD in Electrical Engineering, Mechanical Engineering, Chemical Engineering, Applied Physics, or related field.
• 2–5 years of experience in battery modeling, control algorithms, or related areas (academic or industry).
• Strong understanding of battery fundamentals (electrochemistry, degradation mechanisms, thermal behavior).
• Expertise in mathematical modeling and control theory applied to dynamic systems.
• Proficiency in MATLAB and Python for modeling, simulation, and algorithm development.
• Solid foundation in statistics and data analysis for experimental validation.
• Experience implementing and debugging algorithms using test equipment and large datasets.
• Familiarity with machine learning approaches applied to battery performance and lifetime prediction.

Desired Qualifications (or ability to develop)

• Experience with embedded systems (C/C++), real-time control, and firmware integration.
• Knowledge of Kalman Filters, Extended Kalman Filters, Particle Filters or advanced estimation methods.
• Exposure to AWS services (SageMaker, Lambda, Athena, Quicksight) for large-scale data handling.
• Strong communication and teamwork skills, including ability to present technical work to cross-functional teams.

You’ll love this job if you:

• Are driven to be part of a team doing big things to help our planet.
• Aspire to work with a successful veteran startup management team.
• Are a self-starter and always find ways to get your work done and help team members.
• Are an organized, detail-oriented person being very good at time management.
• Are determined and resilient to keep things moving forward at a startup pace.
• Are assertive and able to influence and partner with the team to get things done.
• Enjoy new challenges and change.

Benefits and Compensation:

Salary Range: $140k - $155k (salary is based on education, experience, skillset, and market value).

We offer the following benefits package:

• Health Care Plan (Medical, Dental & Vision)
• Life Insurance (Basic, Voluntary & AD&D)
• Short Term & Long-Term Disability
• Paid Time Off (Vacation, Sick & Holidays)
• 401(k) Retirement Plan plus company match
• Company Shares Plan

Iontra has an equal employment opportunity (EEO) policy that provides that no applicant or staff member will be discriminated against on the basis of gender, race, color, age, religion, marital status, pregnancy, veteran status, national origin, disability, or sexual orientation.