Battery Systems Engineer

About ALSO.

We’re ALSO, an electric mobility company originally conceived as a part of Rivian. We’re a passionate team of builders, dreamers, doers and innovators, focused on creating entirely new (not to mention, innovative and delightful) vertically integrated, small EVs designed to meet the global mobility challenges of today and tomorrow. Our mission is to inspire everyone to ride ALSO—replacing many local car, truck and SUV miles with ones on vehicles that are more affordable, more enjoyable and 10-50x more efficient.

We're looking for a Battery Systems Engineer (at all levels) to own the battery system architecture and analytical foundation behind our battery systems, helping define not just the battery pack but the broader energy strategy and operating philosophy of the vehicle platform. You'll drive key technical decisions across cell selection, charging strategy, pack architecture, thermal behavior, controls integration, performance, degradation, and operating strategy, directly shaping product direction, vehicle capability, user experience, range, cycle life, cost, and the platform's long-term energy strategy.

This is a highly cross-functional systems role spanning battery engineering, vehicle architecture, controls, thermal systems, and product definition. You should be equally comfortable building models, defining operating concepts, debating architecture tradeoffs, and helping teams converge on the right technical decisions.

What You'll Do

• Own the analytical foundation behind the battery system, leading trade studies across chemistry, pack topology, SOC window, cell selection, and operating limits, and translating engineering decisions into cost, range, performance, and cycle life tradeoffs that drive product and business direction

• Build and advance cell- and pack-level electrical, thermal, and degradation models, developing battery duty cycles from real-world usage data and mission profiles, correlating models against measured data, and using them to set architecture decisions, design targets, and operating limits

• Define how the battery operates, including charging strategy, operational use cases, user-facing behavior, degradation management, and end-of-life operating strategy, ensuring these are reflected in system requirements, controls logic, and vehicle integration

• Own cell evaluation and down-selection, defining characterization test plans, interpreting performance and degradation data, and translating cell behavior into pack-level model inputs, design constraints, and BMS operating envelopes

• Define battery system requirements including protection thresholds, thermal limits, charge/discharge constraints, contactor and fuse sizing, fault detection, and end-of-life criteria, partnering with BMS hardware, firmware, and controls teams to bring the use case context and cell behavior constraints they need to succeed