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The Core Team

Research and Design, Partner, Co-founder

Steve McPhilliamy

Giselle McPhilliamy

Steve McPhilliamy

Steve has over 25 years of experience in product innovation and organizational growth within the realms of medical and consumer technology. Throughout his career, he has had the opportunity to collaborate with academic institutions, government agencies, industry leaders, and philanthropic organizations. In early 2025, he established Design Stack, which combines high-performing design teams with AI-driven innovation to create human-centered design solutions that drive innovative client outcomes.

Research and Design, Partner, Co-founder

Antonio Belton

Giselle McPhilliamy

Steve McPhilliamy

Antonio is a design leader with over 25 years of experience guiding AI driven innovation across med-tech, life sciences, consumer goods, electronics, appliances, and industrial equipment. He has expertise that spans human-centered design, contextual and ethnographic research, design strategy, visual brand language, UI/UX integration, prototyping, and product innovation in structural packaging.

Design lead, Product designer

Chad Davis

Giselle McPhilliamy

Giselle McPhilliamy

Chad, an Industrial Design Leader with over 25 years of experience, has successfully created groundbreaking products, systems, services, and user experiences through AI driven innovation. He prioritizes human-centered design in the process, translating research findings into actionable insights that lead to product innovation. Chad collaborates with engineering and marketing teams to ensure that the deliverables are realistic, cost-effective, and manufacturable.

Computer Science, Machine Learning, Human Centered Design

Giselle McPhilliamy

Giselle McPhilliamy

Giselle McPhilliamy

Giselle is a machine learning engineer who is passionate about AI driven innovation. She graduated with highest honors from Georgia Tech, earning a degree in Computer Science with a minor in Biology, and is currently completing her master’s in Machine Learning. With a strong focus on human-centered design, she has gained experience in multiple software and machine learning AI development roles. Additionally, she has a research background developing transformer-based models for predictive health applications in cancer genomics, contributing to product innovation in the field.

About Us

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A team of experienced product developers

With over seventy-five years of collective design and development experience, we specialize in medical devices, drug delivery systems, and consumer products. Our team leverages AI-driven innovation, all grounded in a human-centered design approach to drive product innovation.

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Based in Chicago

Our team supports AI driven innovation and product innovation for startups to Fortune 500 companies. We seek out new projects that are entrepreneurial in nature, leveraging human-centered design, technologies that can have an impact, and ideas that can improve lives.

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Unique combination of AI + Design

We focus on human-centered design and development, leveraging AI driven innovation to create solutions at an innovative pace. While our proven development process remains consistent, we are harnessing our proprietary AI system to enhance product innovation and drive results more rapidly.

Product Development Services at Design Stack

Please reach us at sales@design-stack.net if you cannot find an answer to your question.

Traditional user-needs research relies on interviews, ethnography, and surveys—but AI is redefining how we uncover opportunity areas. Systems like Henry can now scan thousands of data sources—forums, patents, complaint databases, and clinical studies—to reveal unmet needs and usability gaps before the first interview is even scheduled.


This doesn’t replace human insight—it amplifies it. When AI-driven synthesis becomes the foundation, researchers can spend their time refining, contextualizing, and shaping the insights that truly matter.



Expanding a single patent into a strategic cluster within the same technology category can make the difference between a short-term lead and long-term market dominance.

With Henry, our AI intelligence system, teams can identify where and how to build that depth:

  • Mapping related inventions and prior art to reveal defensible white space
  • Pinpointing claim extensions that close competitor gaps
  • Linking scientific, clinical, and design data to uncover adjacent IP opportunities
  • Guiding the next filings that reinforce your core innovation themes


Modern Human Factors (HF) isn’t “AI instead of testing”—it’s AI before and between testing to focus risk where it matters.

Why AI HF support is sound (and aligned with FDA thinking):

  • HF remains mandatory; the inputs are evolving. FDA’s HF guidance requires a rigorous, risk-based process; it does not prescribe only lab studies as inputs. Literature, complaint data, and adverse-event analyses are all valid evidence streams feeding formative work. AI just helps scale those inputs. 
  • Real-world evidence is encouraged. FDA explicitly supports using real-world data (e.g., MAUDE, user reports) to identify risks and inform development decisions. AI/NLP makes that synthesis faster and broader, not looser. 
  • AI in device development has guardrails. FDA’s AI/ML action plan and Good Machine Learning Practice (GMLP) lay out principles for data quality, transparency, and validation—exactly the controls that prevent “hallucination” from driving decisions. 
  • Signal detection is stronger, not weaker. Peer-reviewed work shows NLP can mine adverse-event narratives to surface use errors and failure modes earlier—improving where human testing should target. 

Bottom line: AI-driven formative synthesis prioritizes subsequent formative/usability testing—it doesn’t replace it. The result is smarter Formative 2 and a clearer trace from real-world signals → risk analysis → targeted human studies → safer designs. That’s exactly the direction regulators, HF standards, and leading teams are moving.

At Design Stack, Henry pairs large-scale evidence synthesis with expert HF judgment so teams test what matters most—faster, with greater confidence.


We believe in small teams that drive towards targeted outcomes, we do not rely on a solo project manager or single program leads. The strategic team members act collectively on fast paced processing and utilize digital tools to confirm decisions with our clients and keep all parties engaged and aligned. 


Our team is focused on the integration of AI and product development to solve client needs. Many of our clients are startups that run in stealth mode until they are ready for a product release.  You will not find us on social media marketing campaigns  and we do not hire agencies to promote our services. Our growth and client list  is based on word of mouth and strong relationships, not hype or bots. If additional expertise is required for the program, we work with various development partners contingent upon the specific needs for each project.


Startups are different than big companies and because of that we structure our process to support the needs of the group.  We established a development path that provides an option based on both parties' interests, to roll a percentage of the fees into equity at a specific time in the program. To learn more about our portfolio of startup companies and our process drop us a email. 


Design-stack’s AI system collaborates iteratively with our core design team to expand ideas, identify user needs, identify technology and design trends, map out competitive market product solutions, forecast on next-generation concepts, and identify gaps in intellectual property. While Henry may not be adept at generating new concepts without human input, the system’s highly iterative nature necessitates the expertise of an experienced product development team to interpret Henry’s findings. The synergistic collaboration between the design team and AI has yielded unique and novel solutions that seamlessly incorporate a multitude of inputs at an unprecedented rapid pace.  


In product development, understanding user needs is everything — but gathering those insights can be slow, fragmented, and biased by what we think users want.

That’s where Henry AI changes the game.


Henry scrapes web data, including chat groups, forums, and user communities, to uncover the real conversations happening around a product or category. It doesn’t just collect data — it interprets it through multiple lenses:

- User Needs: Identifies pain points, unmet expectations, and emotional drivers.

- Performance & Usability: Detects recurring complaints, workflow issues, or missing features.

- Market Signals: Tracks emerging expectations and competitor differentiators.


What makes Henry unique is the ability to adjust the influence of different data categories — weighting technical feedback, emotional sentiment, or market trends differently to match the development stage.


The result: a faster, data-driven path to uncovering true user needs — transforming web noise into actionable design direction. By automatically collecting, filtering, and summarizing qualitative data from diverse sources — including user studies, forums, MAUDE reports, and clinical literature it allows the team to identify patterns. 


This is how AI and human-centered design combine to accelerate innovation.
Henry doesn’t replace designers or researchers — it empowers them to focus on what matters most: creating solutions users truly value.


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