Principal Engineer, Physical Design Verification

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

Qualifications

Baseline skills/experiences/attributes:

• BS/MS/PhD in EE/CE or equivalent practical tapeout experience.
• 8–12+ years (typical Principal level) in physical verification (PV) signoff for digital SoCs/ASICs with multiple successful tapeouts.
• Strong hands-on expertise in DRC/LVS/DFM closure, including hierarchical LVS debugging, connectivity issues (opens/shorts), and waiver governance.
• Proven ability to drive signoff end-to-end: methodology definition, closure execution, and tapeout release gating/documentation.
• Proficiency with major PV tool stacks (e.g., Calibre-class flows) and strong understanding of PDK/rule deck intent and rule-debug workflow.
• Solid understanding of how physical implementation choices (P&R/CTS/routing/ECOs) impact PV outcomes, schedule risk, and manufacturability.
• Strong scripting/automation skills (Python/Tcl/shell) for reproducible flows, regression scaling, and metrics/dashboards.
• Demonstrated cross-functional execution with PD/STA/power/IP owners to drive closure and make pragmatic signoff tradeoffs.
• Experience supporting block-to-top signoff integration and ensuring third-party IP meets tapeout-quality acceptance criteria.

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

• Advanced node experience (28nm or smaller) and associated DFM complexity.
• Experience in regulated / high-reliability products where traceability and signoff rigor are critical.
• Familiarity with reliability/power integrity signoff concepts (EM/IR fundamentals) and coordination across signoff streams.
• Experience interfacing with foundry/PDK vendors on rule updates, interpretations, and signoff collateral alignment.

Values

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.

Location

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. 

Benefits and Perks

• 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.
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