Sang Han

I design it, then I build it.

Principal product designer with 10+ years at Roblox, Disney, Zynga, Jam City and Cambly. I design AI-powered products and the patterns people use to work with them, and I work across design, interface art, animation and code.

Based in San Diego. Currently making Nightbound.

Experience

  1. Crooked Cats Studio

    Feb 2026 – Present

    Founder and Solo Developer

    Built Nightbound alone in Godot: design, UX, interface art, animation and code. Concept to a live Steam page and public demo in seven months.

  2. Kewl.ai

    Oct 2024 – Dec 2025

    Founding Product Designer

    First design hire at an AI company. Designed and launched Hii5, including its AI-driven features and the interaction patterns people use to work with them. Built the design language from zero.

  3. Roblox

    Jun 2021 – May 2024

    Principal Product Designer

    Owned UX for Roblox Connect, the platform’s real-time social layer, shipping to mobile, console, desktop and web at once for 250K+ daily users. My research drove an API-first architecture that 137+ experiences adopted.

  4. Jam City

    Dec 2019 – Jun 2021

    Lead UI/UX Designer

    Led UI/UX on an HGTV-branded mobile game and built its interface in Unity. Hired and managed two designers.

  5. Cambly

    Mar 2019 – Nov 2019

    Product Designer

    Redesigned onboarding for a platform running 60K+ sessions a day, contributing to 33% user growth.

  6. Zynga

    May 2017 – Mar 2019

    Senior UX Designer

    Designed social and monetization systems for Words With Friends 2. Reworked ad UX for a 3% revenue lift, about $3M a month, without spending player trust.

  7. Disney Interactive

    Oct 2012 – May 2017

    Senior UX Designer

    Led UX on story-driven free-to-play games like Ghosts of Mistwood, and built core UI in Unity for titles that ran live for years.

How I work

Skills

AI
Designing AI features and their interaction patterns, agentic workflows, AI-assisted prototyping
Design
Product and game UX, design systems, interactive prototyping, interface art, UI animation
Games
Concept to launch, onboarding, progression, social and monetization systems, live ops
Build
Godot, Unity, GDScript, C#, Figma, Protopie, Framer
Education
BFA in Visual Storytelling and Storyboarding, Academy of Art University