Staff Firmware Engineer, Android

Company: Tonal Systems, Inc.
Location: San Francisco
Posted on: May 24, 2025

Job Description:

Who We AreTonal is the world's first all-in-one home gym with a simply stunning design. It has completely revolutionized the fitness journey, with adaptive weight and coaching cues powered by advanced A.I. technology. We've united a diverse team of experts and decades of research to reinvent strength training, making it more efficient, more effective and more engaging. With this in mind, we want to bring that same innovative approach to the workplace. At Tonal, we continue our shift of emphasis by growing our instrumental team. We collectively weave our knowledge and creativity, as we redefine the future of fitness, and Power Progress for our members.OverviewAs part of the Hardware department at Tonal, the Firmware team helps build our intelligent fitness system from the ground up. We enjoy the opportunity to create a great product and to expand our technical breadth in the process. The Firmware team works across several embedded domains from wirelessly connected sensors to high powered motor control. We leverage embedded processors running anything from bare metal to Android to create a device that delivers an exceptional and seamless user experience. We are looking for a seasoned AOSP or Linux Firmware Engineer to join the team and help take our product platform to the next level.Who You Are

• 10+ years firmware development experience with a strong foundation in embedded systems
• Extensive hands-on experience in AOSP development for Android 6, Android 10, and Android 13+.
• Deep understanding of the Android Framework, system services, HAL (Hardware Abstraction Layer), and system boot processes across different Android versions.
• Experience modifying and optimizing AOSP components, including SystemUI, Power Management, MediaCodec, SurfaceFlinger, and AudioFlinger.
• Strong expertise in C/C++ and Java for Android system-level development.
• Proficiency in Python, Bash, and Makefiles for automation and build scripting.
• Hands-on experience with different chipset platforms (Snapdragon, MediaTek, Rockchip, or similar).
• Experience working directly with ODMs, chipset vendors, and sensor manufacturers to integrate and optimize drivers.
• Expertise with the AOSP build system, including customizing system images and working with Gerrit/code review tools.
• Strong debugging skills using adb, logcat, perf, strace, systrace, and other low-level debugging tools.
• Ability to architect, develop, and deliver AOSP-based features from initial concept through production.
• Preferable additional experiences:
  • Optimizing AOSP components for performance, power efficiency, and memory usage on Android 6, 10, and 13+.
  • Development of device drivers for sensors, cameras, microphones, or other peripherals in an AOSP environment.What You Will Do
    • Architect, develop, and customize the AOSP platform for Android 6, Android 10, and Android 13+ across our embedded systems.
    • Modify, optimize, and maintain Android system components, including framework services, HALs, kernel drivers, and system apps.
    • Develop and maintain Android APKs written in C/C++ and Java, ensuring seamless integration with AOSP services.
    • Work closely with firmware and hardware teams to integrate and optimize sensors, cameras, microphones, and other peripherals across Android versions.
    • Collaborate with ODMs and chipset vendors to enhance system performance and resolve platform issues.
    • Customize Android's power management, system services, and boot process to fit product requirements.
    • Support manufacturing teams by improving and troubleshooting AOSP-based test applications used on production lines.
    • Ensure best practices in AOSP development, testing, and deployment across Android 6, 10, and 13+.
    • Provide technical leadership on AOSP-related challenges, ensuring high product quality and stability.
    • Enjoy using the product, provide feedback, and help make it even better!At Tonal, we believe that the unique and varied lived experiences of our teammates contribute to our overall strength. We don't just appreciate differences, we celebrate them, and we always seek people that represent a wide variety of backgrounds. We're dedicated to adding new perspectives to the team and designing employee experiences that contribute to your growth as much as you do to ours. If your experience aligns with what we're looking for (even if you don't check every single box), send us your application. We would love to hear from you!Tonal is committed to meeting the diverse needs of people with disabilities in a timely manner that is consistent with the principles of independence, dignity, integration, and equality of opportunity. Should you have any accommodation requests, please reach out to us via our confidential email, accessibility@tonal.com. All requests will be addressed and responded to in accordance with Tonal's Accessibility Policy and local legislation.
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Keywords: Tonal Systems, Inc., Rancho Cordova , Staff Firmware Engineer, Android, Engineering , San Francisco, California