Firmware Engineer II

Hinge Health•San Francisco, CA

About The Position

Hinge Health is seeking a Firmware Engineer to join our Hardware Engineering team. In this role, you will play a key part in designing and developing our next-generation hardware products. As a junior-to-mid-level engineer, you will work on diverse projects, driving firmware / embedded software for highly integrated medical devices. You will work cross-functionally with electrical, mechanical, and manufacturing teams to bring products from concept through production. The ideal candidate is excited about solving real problems with hardware – your work will have a direct impact on reducing pain and improving the lives of our millions of members. In joining our HW group within the broader R&D organization, you will be part of a highly capable, motivated, small team where your contributions and ideas truly matter.

Requirements

2+ years of professional experience in Firmware or Embedded Software, writing code for consumer electronics, medical devices, or other highly integrated embedded hardware
Strong expertise with C in a firmware / embedded systems context
Proficient with low-level drivers (ADC, PWM, etc.) and communication protocols (I2C, SPI, UART, etc.)
Proficient in Python for creating tools for firmware testing and task automation
Experience developing in a team environment using version control (Git) and with embedded development tools and workflows (setting up build systems, J-Link, debugging)
Familiarity with Electrical Engineering design – You can read datasheets and schematics, or deep dive with an EE to do a pin/peripheral allocation for an MCU
Competency with standard lab equipment such as oscilloscopes, logic analyzers, multimeters, and power supplies

Nice To Haves

Experience working in medical device development or, alternatively, within another highly regulated industry (aerospace, automotive, etc.)
Experience developing firmware with the help of AI, both as a copilot and in agentic mode
Experience developing with an RTOS, especially Zephyr
Experience with Nordic nRF5x SoCs and the Nordic Connect SDK
Experience with Bluetooth LE
Experience with bootloaders, firmware update, and managing memory maps
Familiarity with DevOps for embedded – CI pipelines (GitHub Actions, GitLab CI) and automated testing with hardware-in-the-loop (HIL) setups

Responsibilities

Develop firmware for highly integrated embedded devices that are loved by our members and make a real positive impact
Work at all stages of the product development process, from exploration and prototyping to detailed design, testing, and ramping to mass production
Collaborate closely with electrical, mechanical, and senior firmware engineers on system architecture and integration
Ensure design quality and meeting medical device regulatory requirements with clear documentation and robust testing
Support DevOps for embedded software, including automation of building and testing code
Keep abreast of the latest developments in AI and leverage the tools in a way that makes sense for firmware