Principal Engineer, Physical Implementation

Butterfly Network, Inc. (NYSE: BFLY) is driving a digital revolution in ultrasound imaging and sensing with its proprietary Ultrasound-on-Chip™ semiconductor technology and software solutions. Butterfly first proved its technology in the point-of-care ultrasound market – commercializing the world’s first single-probe, whole-body portable ultrasound device, which is now on its best-selling, third-generation: Butterfly iQ3™. The Company combines its advanced hardware with cloud software and AI, an enterprise workflow solution (Compass AI™) and other offerings to drive adoption of affordable, accessible ultrasound. Butterfly also enables third-party development of imaging AI apps through Butterfly Garden™, its software development kit and AI partnership initiative. 

In addition to its medical imaging products, Butterfly Embedded™ is the Company’s Ultrasound-on-Chip™ licensing and co-development program designed to enable a new wave of ultrasound-enabled technologies across non-competitive healthcare markets and beyond. Through Butterfly Embedded™, partners can build and scale novel ultrasound applications powered by Butterfly’s proprietary semiconductor chip and software platform. Butterfly’s innovations have been recognized by Prix Galien USA, Fierce 50, TIME’s Best Inventions and Fast Company’s World Changing Ideas, among other achievements.

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

Baseline skills/experiences/attributes:

• BS/MS/PhD in EE/CE or equivalent physical design experience.
• 8–12+ years (typical Principal level) in physical design (PD) with deep knowledge of industry standards and practices in Physical Design, including physically aware synthesis, Floor-planning, DFT insertion, and Place & Route.
• Experience developing and implementing Power-grids and Clock specifications.
• Strong understanding of Physical construction, Integration and Physical Verification.
• Knowledge of SoC Architecture and HDL languages (Verilog) to interface with logic design team for timing fixes.
• Power user of industry standard Physical Design & Synthesis tools such as Genus, Innovus, Tempus.
• Hands-on expertise in DRC/LVS/DFM closure, including hierarchical LVS debugging, connectivity issues (opens/shorts), and waiver governance.
• Experience with reliability/power integrity signoff (EM/IR fundamentals).
• Proven ability to drive end-to-end signoff, including methodology definition, closure execution, and tapeout release documentation.
• Strong scripting skills (Python, Tcl, or shell) for reproducible flows and metrics dashboards.
• Demonstrated ability to work cross-functionally with front-end designers and IP owners to drive closure and support block-to-top signoff integration.

Ideally, you also have these skills/experiences/attributes (but it’s ok if you don’t!):

• Advanced node experience (16nm or smaller) and associated DFM complexity.
• Experience in regulated / high-reliability products where traceability and signoff rigor are critical.
• Experience with multi-voltage, power-gated, and power-retention designs.
• Practical knowledge of hierarchical design, top-down budgeting, and physical convergence.
• Experience integrating internal/external IP and defining requirements in the physical domain.
• Experience interfacing with foundry/PDK vendors regarding rule updates and signoff collateral alignment.

Innovation is what we do. Our values are how we make it happen. Butterflies are and believe in…

• Patient-Centric Innovators: Our mission is THE mission.
• Empowered to Impact: Every voice matters.
• One Team, One Goal: Unity fuels progress.
• Growth Champions: We embrace challenges.
• Action-Oriented Achievers: We follow through, every time.

Butterfly offers a hybrid work model for most positions, with team members spending two or more days a week in the office. While flexibility is key, we value in-person connections that spark creativity and teamwork. Our offices are designed for collaboration, with comfortable workspaces, stocked kitchens, and opportunities to connect with peers.

This is a hybrid position and will be based out of our office in either the Greater SF Bay Area or Burlington, MA. 

• Comprehensive health insurance, encompassing dental and vision coverage, is provided to all our employees. As a health-tech company, we prioritize the well-being of our teams. We also contribute to Health Savings Account (HSA) accounts for all enrolled employees on an annual basis.
• Comprehensive Employee Assistance Program - we provide access to tools and resources to support your emotional health and day-to-day needs.
• 401k plan and match - we facilitate your retirement goals.
• Eligible employees will have the opportunity to participate in Employee Stock Purchase Plan (ESPP)
• Unlimited Paid Time Off + 10 Holiday Days a Year - recharge and come back ready to make an impact
• Parental Leave - we aim to provide our employees with time to bond with their growing family, along with additional support for primary caregivers to help transition back to work 
• Competitive salaried compensation - we value our employees and show it 
• Equity - we want every employee to be a stakeholder
• The opportunity to build a revolutionary healthcare product and save millions of lives! 

Our estimated salary for this role located in Burlington, MA is $200,000 along with bonus, equity, and comprehensive benefits. Compensation is determined based on skills, qualifications, experience, and market demand. 

Our estimated salary for this role located in the SF Bay Area is $240,000 along with bonus, equity, and comprehensive benefits. Compensation is determined based on skills, qualifications, experience, and market demand. 

For this role, we are only considering candidates who are legally authorized to work in the United States and who do not now or in the future require sponsorship for employment visa status.

Butterfly Network does not accept agency resumes.

Butterfly Network is an E-Verify Company. 

Butterfly Network is an equal opportunity employer.  Regardless of race, traits associated with race, color, ancestry, religion, gender, national origin, sexual orientation, age, citizenship, marital status, disability or Veteran status. All your information will be kept confidential according to EEO guidelines.

Butterfly requires security adherence responsibilities from all employees. These include:  adhering to all company security policies and procedures, utilizing provided company assets securely, and completing all required security awareness training programs. Safeguarding company data and systems from unauthorized access, modification, or destruction, contributing to the overall security posture of the organization. Immediately reporting any suspected or actual security incidents, including phishing attempts, malware infections, or unauthorized access, following the established incident response procedure

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