Senior Firmware Engineer

At Eko, we’re dedicated to providing healthcare professionals with industry leading digital tools to hear and understand their patients’ hearts and lungs. With our platform, clinicians can detect cardiopulmonary disease with higher accuracy, diagnose with more confidence, manage treatment effectively, and ultimately give their patients the best care possible.

With over $165M in funding from partners like 3M and the Mayo Clinic, Eko has become one of the fastest growing digital health companies, doubling our customer base in the last year to over 500,000 clinicians across 4,000 U.S. hospitals. We’ve built a tremendously talented, diverse, and mission driven team and are proud to be certified as a Great Place to Work®.

Together we are committed to investing in each other and our mission to ensure all patients have access to high quality care.

We’re seeking an exceptional firmware engineer to join our core engineering team and help us build lifesaving technology at the intersection of hardware and software. You’ll collaborate daily with mechanical, electrical, acoustic, and UX engineers. You’ll architect and maintain the firmware that serves as the nervous system of our devices, coordinating signal processing, power management, wireless communication, and user interaction within embedded constraints.

You’ll collaborate directly with a small firmware team on architectural decisions for both shipping products and next-generation prototypes. This hands‑on technical role requires quickly mastering our existing codebase to extract learnings while building new systems, writing production code, and shaping product direction through technical exploration.

As a hybrid role with required onsite presence on Tue/Wed/Thu.

• Design develop and test embedded firmware for next‑generation digital stethoscopes
• Maintain and enhance firmware for currently shipping products
• Quickly learn existing codebases and extract learnings for future development
• Collaborate with other firmware developers on architectural decisions, code standards, and system design for a cohesive product portfolio
• Architect real‑time systems using FreeRTOS and other embedded operating systems
• Optimize firmware for code size, RAM usage, and execution efficiency based on system constraints
• Develop and maintain device drivers for peripherals including audio amplifiers, PMICs, displays, sensors, and communication interfaces
• Implement Bluetooth Low Energy communication stacks and custom characteristics
• Transform loosely‑defined product concepts into working prototypes, iterating rapidly with the product team to refine specifications
• Collaborate with electrical engineers on component selection, schematic review, and system architecture decisions
• Conduct code reviews, establish firmware best practices
• Navigate medical device regulatory requirements and contribute to design control documentation

• 10+ years of embedded firmware development experience
• Deep expertise in C/C++ for embedded systems
• Proven experience with FreeRTOS, Zephyr, or similar embedded RTOS environments
• Strong understanding of embedded system optimization: code size, RAM footprint, and CPU cycle management
• Experience developing bare‑metal drivers for I2C, SPI, UART, I2S, and other communication protocols
• Solid knowledge of Bluetooth Low Energy (BLE) stack implementation and custom GATT service development
• Experience with ARM Cortex-M microcontrollers (or similar embedded architectures)
• Proficiency with embedded debugging tools (JTAG/SWD debuggers, logic analyzers, oscilloscopes)
• Understanding of power management strategies for battery‑operated devices
• Experience working from electrical schematics and datasheets to implement hardware interfaces

• Experience in medical device development (FDA regulated environments, IEC 62304, design controls)
• Background in consumer electronics or consumer medical devices
• Knowledge of digital signal processing (DSP) implementation on embedded platforms
• Experience with audio signal processing or acoustic measurement systems
• Fami…