Some people say I look like Napoleon

But I don’t see it.

Old World Vulture opening for MogwaiPhoenix Concert Theatre, Toronto · April 26, 2011Watch on YouTube

Mike Costanzo in a black hat and plaid shirt, looking straight out with a slight smile.
But I don’t see it.
Old World Vulture opening for MogwaiPhoenix Concert Theatre, Toronto · April 26, 2011Watch on YouTube

2004–2012

Creative collaboration

I started in bands: making websites, posters, booking shows, selling tickets, building an audience together. Songs, then albums, were the first products I shipped. I learned early that making something exceptional takes more than an idea. It takes a team that believes in it, pushes each other to make it better, and keeps raising the bar.

2012–2020

Building a design practice

At Rangle, I built the UX and product design practice from zero, hiring 15+ people as the company grew from 13 to 150+. I was a designer who could code, obsessed with the craft. Together, we developed the practices and standards that helped teams ship excellent client work, one product at a time.

2018–2023

Reconnecting teams to users

At startups like Onist and My Pain Sensei, I saw that teams can ship features and still lose sight of the people they serve. I brought product and engineering closer to users through continuous discovery. I learned that reconnecting the team to the problem makes strategy and execution clearer for everyone.

2023–now

Leading AI teams

Since 2023, I've led teams building AI products: first a personalized shopping experience for Nike, then a dozen GenAI products for clients in banking, insurance, and accounting. The technology changes constantly but the process doesn't: learn by making, moving quickly, and staying close to the customer.

Today

Still hands-on

I still run discovery and prototype in Claude Code and Cursor. Staying close to the work helps me coach teams through uncertainty, test ideas sooner, and close the gaps between product and engineering. The aim is to build a team that can keep moving after the prototype—and products people trust.

  1. 01 / 03 · 1 experiments

    Experiments

  2. CounterpartA contractor texts an order. AI handles the clear-cut lines and brings the tricky ones to a human. See how the review threshold works.

    Counterpart

    Section
    Experiments
    Type
    Live demo
    Year
    2026
    Open

    A contractor texts an order. AI handles the clear-cut lines and brings the tricky ones to a human. See how the review threshold works.

  3. 02 / 03 · 4 pieces

    Ideas

  4. The Big BottomThe next AI opportunity may be the customers everyone overlooked. Explore how agentic operations can make previously uneconomic markets viable.

    The Big Bottom

    Section
    Ideas
    Type
    Essay
    Year
    2026
    Read it

    The next AI opportunity may be the customers everyone overlooked. Explore how agentic operations can make previously uneconomic markets viable.

  5. Avoiding the Design System Death SpiralA component library can grow while its value shrinks. Lessons from years of building design systems on spotting the spiral and keeping a system useful.

    Avoiding the Design System Death Spiral

    Section
    Ideas
    Type
    Talk
    Year
    2024
    Read it

    A component library can grow while its value shrinks. Lessons from years of building design systems on spotting the spiral and keeping a system useful.

  6. Lean DiscoveryWhat if the next feature solves the wrong problem? A practical approach to mapping customer pain and testing solutions before committing to a build.

    Lean Discovery

    Section
    Ideas
    Type
    Article
    Year
    2023
    Read it

    What if the next feature solves the wrong problem? A practical approach to mapping customer pain and testing solutions before committing to a build.

  7. How Steve Jobs REALLY helped Apple get back to basicsOne Steve Jobs quote became an excuse to ignore customers. Revisit what he actually meant, and what Apple’s return to basics can teach product teams.

    How Steve Jobs REALLY helped Apple get back to basics

    Section
    Ideas
    Type
    Article
    Year
    2022
    Read it

    One Steve Jobs quote became an excuse to ignore customers. Revisit what he actually meant, and what Apple’s return to basics can teach product teams.

  8. 03 / 03 · 3 case studies

    Case studies

  9. Nike KitPrototyped in under 30 days, this personalized AI shopping assistant won executive buy-in and expanded Rangle’s work with Nike.

    Nike Kit

    Section
    Case studies
    Type
    Case study
    Year
    2023
    Open

    Pushing the boundaries of personalized shopping with a Gen-AI-enabled POC for one of the world's leading brands.

  10. MovebuddyFrom a stalled product to 5,000+ booked moves. How customer discovery, instant quotes, and a trust-first strategy brought a moving marketplace to life.

    Movebuddy

    Section
    Case studies
    Type
    Case study
    Year
    2023
    Open

    How to find product-market fit quickly, and take the stress out of moving.

  11. My Pain SenseiA patient-focused product pivot preceded a $30M acquisition within 18 months. See how research reshaped a tracking tool into a chronic-pain management program.

    My Pain Sensei

    Section
    Case studies
    Type
    Case study
    Year
    2018–2020
    Open

    Turning a failing product into a successful exit in less than 2 years.

Highlights

Smaller pieces, over the years

Smaller projects, experiments, and details from over the years. Select an image or video to explore the project.