Research that moves AIhealthhardwaresoftware forward.

Senior Mixed-Methods UX Researcher at Google. I research across ecosystems of software and hardware, and have led products from 0→1, including a 13M+ user launch of the Google Health app, FDA regulated software development at Samsung, and ML healthcare solutions at Verily.

Rakh Hargett, Senior UX Researcher
Rakh Hargett
Senior Mixed-Methods UX Researcher
6+ Years
Mixed-Methods UXR
13 Million+
Users — Google Health app GA launch
SAMSUNG
verily health

Selected work

Case studies

Selected UXR projects across agentic AI, health, software, hardware, and regulated industries.

2024–2026

Fitbit → Google Health: Research supporting an agentic AI product transition & 13 Million+ user launch

End-to-end UX research spanning rebranding, AI Health Coach, contextual personalization, agentic memory, information architecture, conversational quality evaluation, and a tiered launch to millions.

0→LaunchAgentic AIConversational qualityMobileWearableData Viz
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Google Health app overview
Samsung Health app on Galaxy Watch and phone
SAMSUNG 2025

FDA Regulated Software Development: human factors for medical device mobile and wearable applications

Spearheaded formative human factors research for SaMD, authoring the Human Factors Validation Protocol, and integrating UX risk mitigation for clinical populations, while cutting time-to-market by 2 months with Agile frameworks.

SaMDHuman factorsFDA regulatoryMobileWearable
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2024

Rebranding Fitbit: Google's first cross-device Material Design study

Cross functional UXR, unblocking Director-level support for the Fitbit + Pixel rebrand with statistical validation across mobile and smartwatch for Material Design adoption.

Design systemsQuant researchMobileWearableSemantics
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Google Health app — four screens showing Today, Fitness, Sleep, and Health tabs
AI computer vision pose estimation research
2022–2023

0→1 AI Mobile and Web App: novel HCI & computer vision research from discovery to 100k-user launch

Led all research for a novel computer vision AI application incubated inside Google Research, building UXR infrastructure from scratch, leading foundational and usability research, a 700-person Fitbit cohort, achieving a 40% improvement in AI model accuracy.

Computer vision AI0→1 launchMobileWebWearableIncubator Research
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verily health 2021–2022

B2B ML Solutions: UXR for complex hospital solutions & clinical discovery

3 foundational UXR studies and 50+ user interviews for a Verily + Highmark Health + Google Cloud joint venture — identifying key clinical intervention windows, multi-user flows,  and shaping ML data architecture for the Living Health model.

B2B researchAI/MLWebUser Flow DiagramsClinical Discovery
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Highmark Health, Verily and Google Cloud logos
5 Users? — usability testing methodology
Thought Leadership 2024

Do you only need to test with 5 users? Understanding the math behind qualitative usability testing.

A deep dive into the statistical foundations of the "5 users" rule — where it comes from, when it holds, and when it doesn't. Written for practitioners who want to make defensible sampling decisions rather than just cite Nielsen.

MethodologySample sizeQuant foundationsUsability testing
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Career

Experience

Oct 2025 – Present
via Akraya · San Francisco, CA
Agentic AIHealthConversational UIMobileWearable13M+ Users
Senior Mixed-Methods UX Researcher
Leading end-to-end research for the Fitbit to Google Health rebrand and AI Health Coach app development from 0→1 product incubation through internal testing, public preview, and 13 Million+ user GA launch.
  • Researched the full product arc from Fitbit rebrand validation through Today page IA, Health Coach personalization, agentic memory CUJs, and GA launch — directly shaping product decisions at each phase
  • Developed conversational quality codebook and co-built autorater evaluation pipelines for AI subagents, establishing CSAT and adoption KPI benchmarks for the 13M+ user GA launch
  • Led safety and risk concept testing for new regulated health features, evaluating user trust thresholds and AI agent behavior across sensitive health contexts
  • Designed and analyzed tiered launch feedback across internal → public preview → GA, triangulating signals across build versions, UI changes, and subagent behavior to maintain research velocity at sprint cadence
Apr – Oct 2025
via Pyramid · Mountain View, CA
SaMDFDAHuman FactorsWearableMobile
Senior Mixed-Methods UX Researcher
Led UXR for Software as a Medical Device — navigating FDA regulatory approval for mobile and wearable health devices in a clinical population context.
  • Authored the Human Factors Validation Protocol — defining the safety and usability testing framework for FDA Pre-submission on a medical-grade wearable
  • Spearheaded formative human factors research integrating UI/UX with risk mitigation for clinical populations, reducing time-to-market by 2 months
  • Developed novel UX research methodologies and cross-functional workshops that aligned engineering, clinical, and regulatory stakeholders on user safety requirements
  • Established SaMD-specific research frameworks applicable to future FDA regulatory submissions across the product line
Jun 2024 – Apr 2025
via Akraya · San Francisco, CA
Material Design SystemsMobileWearableQuant
Senior Mixed-Methods UX Researcher
Mixed-methods UXR across Google Health and Home, Fitbit, Pixel Watch, health mobile apps, and the cross-device Material Design rebrand that preceded the Google Health app launch.
  • Led Google's first quantitative mobile + smartwatch design systems study — unblocked Director-level sign-off on the Fitbit rebrand by providing statistically validated evidence across n=206 participants
  • Conducted n=16 moderated IDIs on color semantics and Material Design mental models, directly informing the visual system adopted across both mobile and watch platforms
  • Improved rapid research timelines by 30% through AI workflow integration — enabling concurrent studies across health dashboards, IA, and AI features without sacrificing rigor
  • Drove UXR for information architecture, Today page stream design, health visualization dashboards, and cross-device consistency at a pace aligned to sprint cadence
Apr 2022 – Mar 2023
Mountain View, CA · Google Research
Computer VisionAI0→1MobileWebWearable
UX Researcher, Google Research
Founded the UXR practice for an AI fitness app incubated inside Google Research, novel computer vision and 3D movement modeling technology with no established UX precedent.
  • Built the UXR practice from zero — 3 foundational studies establishing user journeys, personas, competitive landscape, and design principles before a single pixel was shipped
  • Led 40+ moderated lab and field studies across hardware/software integrations — de-risking camera-based exercise tracking systems through iterative usability and concept testing
  • Managed a 700-participant Fitbit wearable cohort for HIPAA-compliant AI model evaluation — research directly contributed to a 40% improvement in AI movement accuracy and transparency
  • Drove the product from 0 to 100k-user internal Google launch across 5 research phases over 10 months — intake through synthesis at a sustained sprint cadence
Aug 2021 – Jan 2022
Mountain View, CA
HealthMLB2BClinical DiscoveryAI/ML
UX Researcher
B2B UXR for a Verily + Highmark Health + Google Cloud joint venture, guiding ML data architecture decisions for the Living Health population health model.
  • Delivered 3 foundational studies and 50+ user interviews that identified key clinical intervention windows — findings directly shaped ML data collection priorities and database architecture
  • Produced validated user journey maps and clinical decision trees adopted as the behavioral framework for the ML model's training data strategy
  • Fulfilled Statement of Work for a multi-million dollar B2B contract ahead of schedule — establishing Verily's internal UXR credibility with Highmark Health stakeholders
Feb – Aug 2021
Mountain View, CA
Comms0→1Digital StrategyIntranet
Internal Communications Manager
Orchestrated a digital communication strategy for Verily Health Platforms, improving synchronized product development across 250+ team members and 6+ companies.
  • Developed and launched a health tech intranet site on a 5-month timeline, enabling collaboration across 6+ companies and 250+ employees for multiple cross-functional 0→1 product launches
  • Supported management of a UX educational video series helping employees understand complex healthcare systems, user segmentation, and value propositions
Mar 2023 – Jan 2024
Asia · 5+ countries
Travel
International Travel & Cultural Immersion
A deliberate career pause to travel 5+ countries across Asia — enhancing cultural sensitivity and cross-cultural communication skills directly applicable to designing inclusive experiences for diverse global populations.
Apr 2014 – Feb 2021
Mountain View, CA · 7 Years
Digital HealthProgram Mgmt
Health & Performance Team, Google
Managed digital health programs and initiatives for Google's internal workforce, streamlining healthcare services and driving data-informed improvements for 150,000+ employees across Google's global footprint.
  • Utilized surveys, data analysis, and A/B testing to optimize program delivery and user engagement — resulting in a 15% increase in online viewership
  • Led a team of 50+ employees across cross-functional health and wellness programs
  • 7 years at Google building deep institutional knowledge of product culture, health domain expertise, and the employee-as-user perspective that continues to inform research work today
AI fluency

Research, augmented by AI

I treat AI tools as research infrastructure — not shortcuts.

Synthesis acceleration
Faster signal extraction from complex data
At Google, I refined AI analysis processes to extract signals from complex in-product data streams — improving team-wide efficiency and feature prioritization velocity.
Dovetail AIClaudeNotion AI
Conversational AI evaluation
Co-building tools to benchmark AI agents
Co-developed AI tools to automate conversational evaluation across AI subagents at Google Health — establishing KPI benchmarks for product adoption and CSAT at launch.
Custom eval toolingPrompt engineering
Workflow efficiency
30% faster research timelines
Developed AI implementation into UXR workflows at Google — improving rapid research timelines by 30% across a team running concurrent studies on health, wearables, and AI features.
ChatGPTClaudeGemini
This portfolio
Built with AI, authored by me
This site was designed and built in collaboration with Claude. Every credential and word of copy reflects my real work — AI handled the scaffolding, I provided the substance.
Claude SonnetNetlify

What I bring

Capabilities

Research across ecosystems — mobile, web, wearable, and the AI layers connecting them.

🔗
Ecosystem research
I research how users move across mobile apps, smartwatches, web, and AI agents — surfacing the seams and handoffs single-surface studies miss.
🔍
Foundational & Usability
Diary studies, contextual inquiry, semi-structured interviews, and iterative usability testing. I build the research foundation that gives teams confidence from 0→1 through launch.
🧪
Human Factors
Formative and summative usability testing, human factors validation protocols for regulated medical devices (SaMD/FDA), and concept testing across lab and remote formats.
📊
Quantitative fluency
Survey design, statistical analysis, regression modeling, A/B testing, behavioral data. SQL and Python. Comfortable running lean quant studies independently.
🤖
AI-assisted research
Active use of AI tools in synthesis, discussion guide pressure-testing, and stakeholder communication. 30% faster research timelines at Google through AI workflow integration.
🏥
Regulated health domains
Deep experience with HIPAA, SaMD, FDA Pre-submission, and clinical population research. Authored Human Factors Validation Protocol for Samsung's regulatory submission.

About

Rakh Hargett

Two decades working in health and wellness. 12 years at Google. A background in psychology, behavior change, ergonomics, and product development, and a career-long mission to improve the human experience through research that actually drives product direction.

My work lives at genuinely hard intersections: novel AI products with no established mental models, FDA-regulated medical devices where a missed insight has critical implications, health data visualizations where design choices affect whether someone understands their own body. I've developed a specific edge in researching across hardware-software ecosystems, understanding not just single-product UX but the handoffs and mental models users maintain across mobile, web, and wearable simultaneously (with contextual adaptation).

M.S. in User-Centered Design at Brandeis University (Research & Analytics track, expected 2026).

Outside of work: tea service, woodworking, dog training, and meditation. 

Genuinely interested in the intersection of AI and UX as a philosophical question about how tools change how we think, and the ethical implications of decisions.

Get in touch Download CV
Research methods
  • Semi-structured & longitudinal interviews
  • Diary & experience sampling studies
  • Formative & summative usability testing
  • Human factors validation
  • Concept & prototype testing
  • Survey design & statistical analysis
  • Workshop facilitation
Tools
  • Qualtrics, Dscout, UserTesting
  • Figma, Miro, Mural, FigJam
  • SQL, Python, Google Analytics
  • Claude, ChatGPT, Gemini, Dovetail AI
Education
  • M.S. User-Centered Design, Brandeis (exp. 2026)
  • B.A. Psychology, Warren Wilson College
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