Principal Embedded Software Engineer

Company Description

At Butterfly Network, we’re leading a digital revolution in medical imaging, transforming an industry that has long relied on bulky, analog systems. With our proprietary Ultrasound-on-Chip™ technology, we’re democratizing healthcare by shifting ultrasound from the expensive, stationary systems of the past to the connected, mobile, and software-enabled platforms of today.  In 2018, we launched the world’s first handheld, whole-body ultrasound, Butterfly iQ – followed by iQ+ in 2020 and iQ3 in 2024, each more powerful than the last.

Our innovation doesn’t stop at hardware. Butterfly combines our advanced device with intelligent software, AI, services, and education to drive adoption of affordable, accessible imaging. Our technology is proving to help clinicians, clinics, and hospitals enhance care, cut costs, and expand imaging access. We’ve been recognized by Prix Galien USA, Fierce 50, TIME’s Best Inventions, Fast Company’s World Changing Ideas, among other awards.

We’re a team of bold thinkers, problem-solvers, and innovators ready to shape the future of medical imaging. Let’s build something extraordinary together!

Job Description

As an experienced Device Software Engineer at Butterfly, you will work at the intersection of cutting-edge ASIC hardware and the software that brings it to life — designing and developing the bare-metal firmware, device drivers, and embedded platform that powers our ultrasound imaging product line. From early-stage SoC bring-up and pre-silicon emulation through to production-ready imaging pipelines, you will own critical work across the full hardware-software stack. You will partner directly with our ASIC hardware and architecture teams to co-design software-hardware interfaces, develop hardware imaging pipelines, and build the Python tooling that drives ASIC configuration and validates system reliability. We are seeking a talented, driven, hands-on problem-solver who is equally comfortable with a logic analyzer and a CI pipeline. The ideal candidate is passionate about building rock-solid, low-level software that unlocks the performance of real-time imaging systems — and is excited to be a technical leader that the team and broader organization turns to for guidance.

As part of our team, your core responsibilities will be:

• Partner with our hardware, imaging, and mobile software teams to define and develop our next-generation embedded software architecture
• Design performant imaging sequencing control software, safety monitoring systems, and real-time data processing pipelines
• Design, develop, and test bare-metal firmware and low-level device drivers in C/C++ for custom ASICs based on RISC-V or similar processor architectures
• Lead early-stage SoC bring-up, debugging, and validation using both pre-silicon emulation environments and post-silicon hardware platforms
• Collaborate closely with ASIC hardware and architecture teams to define software-hardware interfaces and co-design critical system features
• Develop and maintain hardware imaging pipelines and interfaces (e.g., Cypress FX3 or similar platforms) to support the ongoing evolution of the Apollo ultrasound system
• Develop robust Python tools and scripts to drive ASIC configuration, validate hardware/firmware reliability, and execute ultrasound imaging sequences using both physical and mock (modeled) hardware
• Support hardware bringup by utilizing modern debugging techniques and tools
• Create automated, end-to-end tests and integrate them reliably into our hardware-in-the-loop CI pipeline
• Act as a thought leader to drive new technology, architectures, process, and infrastructure, and act as a mentor for fellow team members
• Perform a broad variety of tasks in support of the role and responsibilities