Firmware Engineer II

About The Role

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.

What you’ll accomplish

• 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

Basic Qualifications

• 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
• Familiarity with standard lab equipment such as oscilloscopes, logic analyzers, multimeters, and power supplies

Preferred Qualifications

• 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