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Tonal Logo Tonal · IT - Software Development

Staff Firmware Engineer, Android

United States, San Francisco 163000.00 - 225000.00 USD / Year · Job Posted February 18, 2026
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Job Description

As 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.

Job Responsibility

  • 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!

Requirements

  • At least 5 years of 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.

Nice to have

  • 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 we offer

  • Offers Equity
  • health insurance
  • retirement savings benefits
  • life insurance and disability benefits
  • flexible paid time off
  • parental leave
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