Principal Product Designer

Principal Product Designer, Mosaic Reporting

Cognita Imaging

Level: Lead / Senior / Staff

Type: Full-time

Location: San Francisco Bay Area (in-person), Remote or Hybrid

Cognita’s mission is to increase the world’s access to healthcare. Radiology is (1) the first-line diagnostic specialty, (2) facing a worsening global workforce shortage, and (3) highly digitized, making it uniquely positioned for AI to have an enormous impact. Stage one of Cognita is focused on expanding access to radiology at scale.

Our founding team met at Stanford, where they laid the groundwork for applying comprehensive AI to radiology. Building on that foundation, Cognita develops vision-language models that read radiology studies the way radiologists do, interpreting the full study in clinical context, and generating draft results that make radiologists more efficient and accurate. In partnership with Radiology Partners, the largest radiology practice in the world, Cognita’s models are trained and validated on one of the world’s largest real-world radiology datasets.

About the Role

As the Principal Product Designer for Mosaic Reporting, you will own the radiologist experience of Cognita’s AI-native, real-time radiology reporting product, part of MosaicOS. Powered by Cognita’s proprietary reporting system, Mosaic Reporting is the first new approach to radiology reporting in over a decade. As a radiologist dictates, the system extracts statements from natural speech and places them into the correct section of the report in real time. Findings, impressions, macros, and edits are all driven by natural dictation rather than templated clicking, so the report comes together as the radiologist reads, with their eyes never leaving the image.

You will define how Mosaic Reporting looks, feels, and behaves for radiologists. A central question of the role is how to introduce a new way of working while giving radiologists enough familiarity to stay confident, and how to read their feedback to decide what to build next. Working alongside the Reporting product lead, you will also help shape product strategy and direction, drawing on your understanding of radiologists to inform what we build and in what order.

Mosaic Reporting is already deployed across thousands of radiologists at Radiology Partners and is proven in production. Your work focuses on the next chapter: improving the experience as it rolls out more broadly across Radiology Partners and to external customers, work that sits directly in the critical path of patient care. You’ll be the first design hire dedicated to reporting, and you’ll work closely with radiologists who are using the tool, clinical AI team and engineering team to continuously improve the experience for the radiologists who use it on every study. You’ll report to the Reporting product lead and partner across engineering and clinical teams to take the product from “works at scale” to “built to scale.”

Your Impact

• Own the end-to-end radiologist experience of Mosaic Reporting, developing a deep understanding of user experience and radiologist satisfaction as the product rolls out more broadly.

• Design a system that adapts to the different ways radiologists have learned to interact with technology, rather than forcing a single workflow.

• Balance innovation and familiarity: introduce new interactions while preserving enough of what radiologists already know to keep them confident and efficient.

• Define how we prioritize next steps to improve radiologist satisfaction, identifying the signal in user feedback that should drive design decisions.

• Contribute to product strategy and roadmap alongside the product lead, using insight into radiologist needs to help shape what we build and how we sequence it.

• Plan and conduct user research (surveys, interviews, and usability studies with practicing radiologists) and synthesize findings into design direction.

• Produce mockups, prototypes, and interaction flows in Figma, and partner with engineering to bring them to production.

• Collaborate closely with radiologists and clinicians to understand what it takes to design Mosaic Reporting as a scalable product used by radiologists and patients around the world.

• Create the standardized product manuals, documentation, and design language that will support customers across Radiology Partners and beyond.

• Establish and own the design system and interaction patterns that keep the product consistent as it grows across surfaces, teams, and customers.

What You Bring

• We are not credential-driven. We only look for evidence of exceptional ability.

• Strong experience leading product design for complex, production software, from research through shipped product.

• Mastery of Figma and modern prototyping tools, with a portfolio that demonstrates both craft and systems thinking.

• A track record of running user research (interviews, surveys, usability testing) and turning it into concrete design decisions.

• Fluency in interaction and visual design, information architecture, and design systems.

• The judgment to balance ambitious, novel interactions against the familiarity and reliability that expert users depend on.

• Comfort operating in a fast-moving, ambiguous environment and owning the design of a product end-to-end.

• Strong written and verbal communication, with the ability to articulate design rationale to engineers, clinicians, and leadership.

• Strong ownership mindset and good product judgment.

What Sets You Apart

• Experience designing for clinical, medical, or other expert and high-stakes professional users.

• Experience designing real-time, low-latency, or voice- and dictation-driven interfaces.

• Familiarity with LLM- or AI-powered products and designing for probabilistic, model-driven outputs.

• Experience working in healthcare or other regulated environments, and handling PHI / building to HIPAA requirements.

• Radiology or medical imaging domain knowledge (modalities, reporting workflows, structured reporting).

• Experience building and maintaining design systems and product documentation at scale across global customers.

• Familiarity with React / Next.js and close, hands-on collaboration with frontend engineers.

Our Culture

• We build from first principles. We question assumptions, reason from fundamentals, and execute with speed and clarity, without sacrificing quality.

• We operate as a true meritocracy. Impact matters, rather than optics. Feedback is direct, respect is non-negotiable, and we support each other with the ownership, trust, and resources needed to do the best work of our careers.

• Every decision we make is grounded in supporting clinicians to improve patient outcomes.

The salary range for this full-time position is:

$190,000–$210,000 base, plus competitive equity