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Anton Castro

Sr. Product Designer & Builder in San Francisco

Designing products for high-stakes work, where the real challenge is building trust. Four 0→1s across healthcare, fintech, and govtech.

Currently building agentic systems at State Affairs

Curated work

Built

The Custoria iOS app: AI camera scan, an identified item, and the vault

Custoria Labs · 0→1 · B2C · iOS

Founding a digital vault for what people value most

Co-founded, designed end to end, and built the iOS app in Swift. Now on the App Store.

Download on theApp Store

Writing

Notes on designing AI-native products: agentic systems, trust, and design that ships in code.

Read on Substack ↗

About

U.S. Navy engineer turned designer. BFA in Human-Computer Interaction, MBA in Design Strategy. I lead with the story, build momentum with working prototypes, and ship.

Experience

  1. Sr. Interaction Designer · Policy Intelligence

    Led the company's first AI product, 360° Views and AI Chat, into its first enterprise contracts.

    • 0→1
    • Enterprise AI
    • Product Strategy
    • Feb 2026 – Present
  2. Co-founder & Founding Designer

    A digital vault for the things people value most, designed end to end and built in Swift; now on the App Store.

    • Founder
    • Swift
    • Security UX
    • Oct 2025 – Present
  3. Product Designer · AI & Growth

    Scaled AI clinical documentation from one product to four: +65% engagement, through the $139M Commure acquisition.

    • Agentic AI
    • Design Systems
    • Healthcare
    • Oct 2023 – Nov 2024
  4. Conversational AI Experience Designer

    Founding designer on Liv, the AI assistant for millions of homeowners; cut onboarding time 75%.

    • Conversational AI
    • B2B2C
    • Sep 2022 – Aug 2023
  5. Product Designer

    120+ interaction demos anchoring the Twitch, Discord, and YouTube partnerships.

    • Prototyping
    • Partnerships
    • Jun 2021 – May 2022
  6. 2019

    Intuit & Electronic Arts

    Product Design Internships

    Intuit: +22% QuickBooks conversion via ML personalization. EA: NBA Live's My Player Mode.

    • ML Personalization
    • Games
    • 2019 – 2020

IRL

Experiences that help me develop “taste”