Founding Product Designer

Sekai

2d•Remote

About The Position

Sekai is building the TikTok for mini apps — an AI-driven consumer platform where people create, remix, share, and play interactive content instantly. We are a Series A company backed by Khosla, a16z, Mayfield, and A, with $30M raised to date. We are remote-first across all positions and are looking for ambitious, AI-native builders who want to help shape the next generation of consumer social products. We are looking for our first design hire: a Founding Product Designer who can own the user experience end-to-end and raise the quality bar of the product. This is not a supporting design role. We want someone who can act as a true UX owner — someone who can identify what feels broken or confusing, define better product experiences from first principles, and help shape the product DNA, visual language, and design system of the company. The right person has strong product taste, excellent UX judgment, solid visual craft, and is highly AI-native. Mandarin Chinese is required for this role.

Requirements

2+ years of product design experience, ideally in consumer or mobile-first products
Strong UX judgment and product sense
Strong visual design skills and high taste level
Ability to design from scratch and bring structure to ambiguous problems
Strong systems thinking and experience building reusable patterns or design systems
High ownership and comfort working in a fast-moving startup
Comfortable working closely with engineers
Highly AI-native and comfortable using modern tools in daily workflow
Mandarin Chinese is required

Nice To Haves

Experience with consumer social, creator, gaming, or AI products
Frontend or engineering background
Ability to prototype in code or implement light frontend work
Experience as an early or founding designer at a startup

Responsibilities

Own end-to-end design across key product surfaces on mobile and web
Drive UX for major product flows and make clear product experience decisions
Improve the overall quality, clarity, and polish of the product
Define and evolve product DNA, visual language, interaction patterns, and design systems
Work closely with founders, product, and engineering to shape and ship new experiences
Use modern AI and design tools to explore, prototype, and iterate quickly