Senior Firmware Engineer I - Batteries

Axon; Scottsdale (AZ); On-site; USD 120,000 - 180,000; Full time

Job summary

Axon is seeking a Platform & Firmware Engineer focused on battery safety and fuel gauging. You will work on complex SoC/PMIC firmware for Axon's battery-powered devices, using C, C++, Rust, and Python.

You’ll contribute to USB-C power management, automated testing, and fleet-wide battery metrics with AI-assisted analysis. Preferred locations include Scottsdale, AZ or Seattle, WA, with opportunities to collaborate across teams.

Qualifications

• Experience writing firmware for battery safety logic.
• Experience with fuel-gauging logic and multi-battery configurations.
• Proficient in C/C++ and Python for firmware development.
• Golang experience is a bonus.

Responsibilities

• Implement firmware for Battery Safety logic and fuel-gauging across devices.
• Develop and verify firmware for accelerated charging with thermal considerations.
• Engineer de-rating strategies to meet state-of-health targets.
• Work on eLinux user-space daemons for power management on SoC PMICs.
• Develop USB-C subsystem firmware and moisture-detection related features.
• Create fleet-wide battery metrics with Splunk dashboards and AI-assisted anomaly detection.

Skills

C language

C++ language

Rust

Python

Battery safety

Battery fuel gauge

Tools

Yocto

Splunk

AI tooling

Job description

Join Axon and be a Force for Good.

At Axon, we're on a mission to Protect Life. We're explorers, pursuing society's most critical safety and justice issues with our ecosystem of devices and cloud software. Like our products, we work better together. We connect with candor and care, seeking out diverse perspectives from our customers, communities and each other.

Life at Axon is fast-paced, challenging and meaningful. Here, you'll take ownership and drive real change. Constantly grow as you work hard for a mission that matters at a company where you matter.

Your Impact

Contribute to AIoT Device-level Firmware Infrastructure as part of the Platform & Firmware development team and advance Axon's mission to Protect Life. The Platform Firmware supports all of Axon's Camera-based products, Robotics, key ownership of the Cellular LTE Link, Automated Test Systems for organizational Engineering Excellence, and is always at the fore-front of Innovation with Hardware Engineering for new programs.

The first priority of your impact is to be a member of the Platform & Firmware Battery sub-team with a critical eye towards Battery Safety & Thermals, Battery Health, Battery Charging, Runtime Profiling, Fleet-wide Metrics and all advanced Battery Firmware logic across Axon's products. Also, innovating and instrumenting Automated Testing fixtures to protect new releases from regressions across many permutations. With few exceptions, the majority of Axon's products are Battery-powered and we put significant emphasis on Battery Traits.

Our team builds with AI in the loop. We use AI coding and data-analysis tools every day to compress routine work, and spend the time saved on what demands an expert: battery safety logic, bench validation and root-cause decisions. You own the correctness of everything you ship, however it was written.

The types of firmware development environments where our most challenging battery work lies is on complex System-on-Chips (SoC), Power Management Integrated Circuits (PMIC), USB-C intricacies, and working with the vendors who own the Battery Fuel Gauges. Our team prefers to work in C, C++, Rust, Python and Yocto. Golang experience is a bonus.

Where You'll Work

Location: Preferred locale is Scottsdale, AZ or Seattle, WA.

[Candidates near Boston, MA; Brussels, Belgium; Tampere, Finland; or Greater Romania may also be considered upon request]

What You'll Do

• Implementation and verification of Firmware for Battery Safety logic
• Implementation and verification of Firmware for Battery Fuel-Gauging logic, including when working with multiple batteries that work together to create a composite Fuel Gauge 0 - 100% value
• Implementation and verification of Firmware for Accelerated Battery Charging with Thermal considerations
• Implementation and verification of Firmware for De-rating Batteries to achieve State of Health RMA targets
• Implementation and verification of Firmware for eLinux User-space daemons that override Power Management and leverage Qualcomm System-on-Chip PMICs
• Implementation and verification of Firmware patches for USB-C sub-systems where power is routed through when customizations are required for battery charging and related topics (e.g., moisture detection)
• Implement fleet-wide battery metrics across 500K+ devices with Splunk dashboards and alerting, using AI-assisted analysis to spot degradation trends and anomalies faster than manual review allows