Lead UX Designer, BillionToOne
$179.5-211.2k
We offer a total compensation package of $317,881 per year
2-3 days a week in office (Menlo Park, CA)
Precision diagnostics for disease detection
Open for applications
Precision diagnostics for disease detection
501-1000 employees
Open for applications
$179.5-211.2k
We offer a total compensation package of $317,881 per year
2-3 days a week in office (Menlo Park, CA)
501-1000 employees
Company mission
To make molecular diagnostics more accurate, efficient, and accessible.
Role
Who you are
- 7–10 years of professional experience in UX, product design, or service design
- 3+ years in leadership roles with demonstrated ability to own design strategy and guide team members
- Proven track record designing in healthcare, biotech, or similarly complex regulated environments
- An exceptional portfolio demonstrating systems-level thinking, strategic leadership, and user-centered problem solving from research through final execution
- Experience in both B2B and B2C healthcare product contexts preferred
- Background working with AI-powered product experiences a plus
- Track record of partnering with product management on prioritization and phased delivery approaches
- Expert-level skills in design and prototyping tools: Figma, Sketch, Miro, or similar platforms
- Deep understanding of user research methodologies, from generative research to usability testing
- Mastery of information architecture, interaction design principles, and UX best practices
- Strong grasp of accessibility standards (WCAG) and healthcare regulatory requirements (HIPAA, FDA)
- Experience creating and maintaining design systems at scale
What the job involves
- We're seeking an exceptional Lead UX Designer to own the end-to-end experience strategy and execution for our prenatal diagnostic platform, Unity
- This role sits at the intersection of cutting-edge genomics and human-centered design - leading the translation of complex molecular diagnostics into seamless, trustworthy experiences that empower clinicians, patients, and operational teams
- As a key member of our product team, you'll lead design from strategic insights through final production, applying systems thinking to design across an interconnected healthcare ecosystem that spans lab processes, electronic health records, provider networks, and patient touchpoints
- You'll bridge scientific complexity and clinical reality while guiding design team members and elevating the craft of the entire organization
- This is a hybrid position (2-3 days per week at our Menlo Park facilities.)
- Own the complete UX vision and strategy for Unity's patient and provider platforms, from research insights through final implementation
- Partner with product leadership to shape roadmaps, define priorities, and determine phased approaches that balance user needs, technical feasibility, and business goals
- Apply systems thinking to visualize and simplify complex relationships between patients, providers, lab processes, payer requirements, and data systems
- Transform scientific complexity into intuitive digital experiences that build trust and understanding
- Translate product strategy into actionable design initiatives that connect user journeys with clinical workflow realities
- Lead the complete design process from discovery and research through wireframing, prototyping, user testing, and final production-ready deliverables
- Create and maintain high-quality design artifacts: user flows, journey maps, wireframes, prototypes, and design system components that capture the full patient and clinician experience
- Own in-product microcopy and content strategy, ensuring every word builds clarity, confidence, and trust
- Drive the evolution of Unity's design system, promoting consistency, scalability, and craft in partnership with branding and marketing teams
- Ensure accessibility, regulatory compliance, and ethical considerations are integrated into every design decision
- Lead user research initiatives to uncover insights that drive product strategy and design decisions
- Advocate for evidence-based design grounded in rigorous user research and testing methodologies
- Synthesize insights from clinicians, patients, and operational teams to identify unmet needs and design opportunities
- Champion the user perspective in cross-functional discussions, balancing clinical requirements, technical constraints, and business objectives
- Oversee and mentor junior designers and UX contractors, providing clear direction, constructive feedback, and opportunities for growth
- Build a culture of design excellence, systems thinking, and user advocacy within the design team and across the organization
- Partner with engineers to ensure the experiential quality of what ships matches design intent and maintains high craft standards
- Present and defend design decisions to stakeholders across product, clinical, and executive leadership
- Collaborate with product managers, engineers, clinicians, and genetic counseling teams to align design work with broader organizational goals
- Identify opportunities and drive initiatives independently while maintaining strategic alignment across teams
Our take
BillionToOne is a precision diagnostics company. Its proprietary molecular counting platform (Quantitative Counting Templates) accurately counts DNA molecules at the single-count level, which has the ability to significantly improve disease detection. While initially focused on prenatal screening and oncological liquid biopsies, the company’s QTC technology is highly scalable and has the ability to make vast improvements to a range of disease detection verticals.
The company’s funding efforts - most notably a 2025 IPO - will enable it to focus on further development and commercialisation of its noninvasive prenatal screening test and oncology products. However, it will need to maintain a strategic outlook, prioritising areas with higher testing frequencies to maximise patient benefit and balance test development costs.
BillionToOne has an important role to play in improving healthcare equity. As more promising peer-reviewed research studies are conducted and providers have increased confidence in the company’s tests, BillionToOne has significant growth potential.
Freddie
Company Specialist at Welcome to the Jungle
Insights
32% employee growth in 12 months
Company
Funding (last 2 of 5 rounds)
Jan 2026
$30m
SERIES C
Dec 2022
$5m
SERIES B
Total funding: $73.3m
Company benefits
- Suite of benefit plans
- Paid Medical, Pregnancy, Parental and Family Leaves
- Retirement savings program with Company contribution
- Generous equity package
- Free daily on-site lunches provided from top eateries
- Latest and greatest hardware (laptop, lab equipment, facilities)
- Free on-site EV charging (compatible with all EVs, including Tesla!)
- Working with a team of ‘rockstars’ who bring out the best in everyone
- The ability to indirectly or directly change the lives of hundreds of thousand patients
- Open, transparent culture that includes weekly Town Hall meetings
Company HQ
Menlo Park, CA
Leadership
Oguzhan Atay, PhD
(Co-Founder & CEO)Former Graduate Fellow at Stanford University (Department of Biology). They also spent time as a Researcher at the University of Oxford.
David Tsao
(Co-Founder & CTO)Former Technical Staff Member at Groupon and Software Engineer at Adku. They also worked as an Engineering Intern at Northrop Grumman Aerospace Systems.
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