Hello, I’m
Diana Hart

Senior Product Leader Building Platforms That Scale to Millions

I build digital platforms that simplify complex systems, deliver measurable outcomes, and scale to millions of users. My work spans fintech, AI-driven insights, developer ecosystems, and enterprise healthcare systems. I specialize in translating ambiguous problems into clear strategies, designing intuitive user experiences, and driving cross-functional execution from concept to launch.
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Platform Scale & Impact

7.5+ Years

Product Leadership in Fintech, AI & Enterprise Systems

2,500+ Solutions

Powering Visa’s AI-driven developer support systems

5,000,000+ Developers

Use Google Maps Platform APIs (Industry Estimate)

Why work with me?

I bring a unique combination of platform thinking, user-centered design, data-driven decision making, and enterprise-scale execution. I lead with clarity, influence, and strong cross-functional collaboration—ensuring teams align around strategy and ship meaningful products quickly and consistently.
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I'm a Professional Product Strategist & Senior Product Leader

I’m a senior product leader with experience across fintech, AI, developer platforms, and enterprise healthcare systems. I specialize in building scalable digital products, improving complex workflows, and leading cross-functional teams. My work focuses on high-impact execution, platform strategy, and user-centric innovation across both enterprise and consumer environments.
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Selected Product Case Studies

A curated selection of high-impact product initiatives across fintech, healthcare, and AI.

Modernizing API developer experience for global fintech adoption

Led a multi-year modernization of the Visa Developer Platform, redesigning sandbox environments, onboarding flows, and documentation used by millions of developers globally to improve API usability, reliability, and partner integration at scale.
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Transforming healthcare workflows with intuitive digital tooling

Redesigned critical Epic EMR workflows across multi-specialty care teams, reducing clinical friction, improving documentation efficiency, and streamlining patient workflows in high-volume healthcare environments.
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AI Behavioral Insights Platform (Concept & Prototype)

Designed and prototyped a 0→1 AI-driven behavioral insights platform that interprets multimodal user signals (voice, text, behavioral patterns) to anticipate needs, surface insights, and reduce user friction.
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View All Works

Expertise Pillars

I drive end-to-end product strategy across fintech, AI, and platform ecosystems—simplifying complex problems and delivering scalable, user-centered solutions.
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Product Strategy & Vision

Defining long-term product direction, growth strategy, and cross-functional alignment for large-scale digital platforms

AI/ML & Intelligent Systems

Applying AI/ML to user experiences, automation workflows, behavioral insights, and platform intelligence.

0→1 Innovation & Scaling

Leading product discovery, MVP development, pilots, and multi-phase scaling from concept through adoption.

Fintech & Payments

Leading global payment APIs, transaction flows, developer experiences, and secure financial products at scale.

Developer Platforms & APIs

Building and scaling APIs, SDK ecosystems, sandboxes, and self-serve developer onboarding.

Cross-Functional Leadership

Partnering with engineering, design, data, compliance, operations, and executives to deliver measurable outcomes.

Let’s Talk Product Strategy & Impact

I bring experience across fintech, platforms, AI, and enterprise systems—focused on building user-centered products that scale and deliver measurable results.
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Experience

A track record of leading product strategy, platform development, and cross-functional execution across global fintech and technology organizations.

01

Visa — Product Manager, Consumer Payments & Platform Products

(Oct 2024 – Present | Global scale)
Impact
Led product strategy and execution across consumer payments and platform products at global scale
Expanded platform capabilities to enable seamless partner and developer adoption
Drove cross-functional alignment across Engineering, UX, Data Science, Legal, Privacy, and Compliance to ship complex initiatives

02

Visa — Product Manager, Visa Developer Platform

(Sep 2021 – Sep 2024 | Global developer ecosystem)
Impact
Defined and executed the North Star vision for Visa’s global developer ecosystem
Modernized developer platform and sandbox environments used by partners worldwide
Improved developer experience and cross-product UX consistency while accelerating platform adoption

03

Product Manager — Epic EMR Innovation (Healthcare)

(Apr 2020 – Jan 2021 | 24 hospitals, 200+ clinics across Northern California)
Impact
Led product strategy and execution for large-scale EMR workflow modernization across inpatient and outpatient care
Improved system reliability, usability, and clinician efficiency across mission-critical clinical workflows
Translated complex clinical, operational, and regulatory requirements into scalable digital product solutions

04

Google / YouTube — Product Manager (via Advantage Technical)

(Oct 2012 - Jun 2013 | Global consumer and developer platforms)
Impact
Supported market expansion initiatives for Google Shopping Express
Launched a global developer feature for the Google Places API
Improved content integrity, metadata governance, and safety across YouTube platforms

Early Career & Consulting Experience

Prysm Systems — Product & Strategy
Nordstrom & LVMH — Consulting Engagements
InnoMedia — Research & Engineering
CSC / PayPal — Network Engineering
Foundational experience in engineering, consulting, and systems design.

What I do?

I help companies define product strategy, build scalable platforms, and create user-centered experiences that drive measurable business impact.
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Product Leadership for Complex Systems

Leading end-to-end product lifecycles from discovery through launch, focusing on clarity, measurable outcomes, and user-centered decision-making.

Platform & Ecosystem Strategy

Building durable platform foundations, API ecosystems, partner integrations, and scalable services.

AI-Enhanced Experiences

Designing intelligent features powered by AI/ML models, behavioral predictions, and context-awareness.

Enterprise & B2C Execution

Delivering solutions across engineering, design, data science, operations, legal, and compliance teams in complex environments.

Companies that use the platforms I’ve helped build

 I’ve led product initiatives that power real-world experiences for millions of users. The platforms and APIs I’ve built at enterprise scale are trusted by teams at leading companies across fintech, entertainment, transportation, and technology.

Ecosystems & Global Networks Supported

Integrations and platforms supported through large-scale payment and product ecosystems.

Areas of Focus

Platform & API Product Strategy
AI-Driven Features & Insights
Developer Experience (DX & Tooling)
User-Centered Design & Research
Payments, Fintech, and Risk
Cross-Functional Leadership
Experimentation & Data-Driven Roadmaps

Leadership Endorsements

Perspectives from leaders I’ve partnered with across product, engineering, and strategy.
Diana scaled an API portfolio of 85+ services processing billions of calls annually, driving measurable improvements in developer experience, platform reliability, and adoption.
Jiri Medlen, Ph.D.
 Sr. Staff Software Engineer, Visa
Diana played a key role in helping Visa’s clients successfully build and launch on the Visa Developer Platform. She consistently unblocked product access, resolved integration issues, and guided teams from Sandbox to Certification—ultimately reducing client time-to-market. Her ability to support customers while driving internal prioritization made a meaningful impact on the platform.
Nikhil Nadkar
Director, Solutions Management, Visa
Diana is a forward-thinking product leader who consistently aligns teams around complex challenges and delivers impactful, scalable products. Her ability to operate at both strategic and execution levels sets her apart.
Sreeni Garlapati
SVP Software Solutions & CIO
Diana brings a rare combination of strategic vision, execution excellence, and cross-functional leadership. She drives innovation while maintaining a clear focus on outcomes and scale.
Barron Lau
Founder

Get in Touch

If you’d like to connect about product leadership roles, collaborations, advising, or speaking opportunities, feel free to reach out using the form below.
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Email:
hello@dianahart.co
Location:
Bay Area, CA
Connect on LinkedIn:
Diana Hart
Senior Product Leader | Platforms, Payments & AI
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