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Founding Product Designer at Sekai

Sekai is reinventing interactive social entertainment with an AI-driven platform for creating and sharing "mini apps," backed by $30M from powerhouses like a16z and Khosla Ventures. As the Founding Product Designer, you’ll define the visual DNA of a new consumer category, working directly with founders to ship immersive experiences to millions. If you are a Mandarin-speaking designer who is AI-native and thrives in fast-paced startup environments, this is your chance to shape the future of social media from the ground up.

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Sekai

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Location

Remote

Compensation

Not Disclosed + Equity

Company

Sekai

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Role overview

As the Founding Product Designer at Sekai, you will define the core user experience and visual language for a new category of AI-driven social entertainment. Working directly with the founders, you’ll own the end-to-end design process across mobile and web surfaces. This high-impact role involves building the design systems that will power the next generation of interactive consumer content.

Sekai is an AI-powered interactive content platform that lets people play, create, remix, and share mini-apps and mini-games instantly. Users can describe an idea and turn it into a playable experience in seconds, then explore an infinite feed of community creations and remix others’ experiences.

What you will do

  • Own end-to-end design across mobile and web, driving UX for major product flows and making critical experience decisions.
  • Define and evolve Sekai’s visual identity, interaction patterns, and scalable design systems to ensure consistent, high-quality user experiences.
  • Leverage modern AI tools within your daily workflow to rapidly explore, prototype, and iterate on innovative interactive content features.

Who this is a fit for

  • Has 2+ years of experience in product design, specifically within consumer-facing or mobile-first products, demonstrating strong visual craft and systems thinking.
  • Must be fluent in Mandarin Chinese to effectively collaborate with the existing team and communicate nuances in product strategy.
  • Is an “AI-native” designer who actively integrates modern AI tools into their design process to accelerate prototyping and enhance product capabilities.

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Why this role is remarkable

  • Defining a new category of consumer social interaction, often described as the “TikTok for mini apps,” at the intersection of AI and entertainment.
  • Backing from world-class investors including Khosla Ventures, a16z, and Mayfield, providing a stable $30M foundation for ambitious product growth.
  • True founding-level ownership where you define the product DNA, visual language, and interaction patterns alongside a lean, elite team of 15.

How Jack & Jill work together

Jack
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Jill
I recruit from Jack’s network and make the intro when I spot a great match.
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Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.

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What happens next?

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Jill is the AI recruiter working for the company. She recruits from Jack’s network.

If your profile’s a match and Sekai wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.

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