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Founding Engineer (+ Equity) at Sekai

Jack & Jill · San Francisco, CA · 4 days ago
On-siteEngineering$30/hrFull-time

Job Description

As a Founding Engineer at Sekai, you will build and define our native Android foundation from the ground up. You will architect the mobile platform that enables creators to instantly turn AI-powered ideas into interactive, playable experiences. This high-impact role involves designing core navigation, lifecycle management, and seamless hybrid integrations for millions of users.

Why this role is remarkable

  • Founding-level ownership at an AI-native startup backed by top-tier investors including Khosla Ventures, a16z, Mayfield, and A*.
  • Build the first platform where interactive content moves at the speed of social media, reaching over 1M creators and players.
  • Directly shape the technical architecture and product vision alongside a world-class team of engineers from Google and ETHDenver.

What You Will Do

  • Arcitect and build the native Android experience, including app shell architecture, navigation, and core lifecycle management.
  • Implement complex hybrid integrations between native Kotlin and React Native, Flutter, or WebView-based interactive experiences.
  • Partner with AI and design teams to ship high-performance, polished consumer features that drive engagement for millions of users.

Requirements

  • Has 5+ years of professional Android engineering experience with deep expertise in Kotlin and the Android SDK.
  • Demonstrates a proven track record of shipping consumer-facing mobile apps and building technical platforms from 0 to 1.
  • Possesses experience integrating hybrid frameworks like React Native or Flutter into native Android environments within high-growth startups.

Qualifications

  • Strong problem-solving skills and ability to work independently and as part of a team.
  • Experience with version control systems such as Git.
  • Knowledge of cloud services and server-side technologies.

Skills

  • Proficiency in Kotlin and the Android SDK.
  • Experience with hybrid frameworks like React Native or Flutter.
  • Understanding of machine learning and AI concepts.

Benefits

  • Competitive salary not disclosed.
  • Equity compensation.
  • Work in San Francisco, USA.
  • Opportunity to work with a world-class team of engineers from Google and ETHDenver.
  • Access to top-tier investors including Khosla Ventures, a16z, Mayfield, and A*.

Pay

Not disclosed.

Schedule

Full-time.

Benefits

  • Health insurance.
  • Retirement plans.
  • Flexible work schedule.
  • Professional development opportunities.

About the role

This is a Founding Engineer position at Sekai, a $30M Series A San Francisco company backed by Khosla Ventures, a16z, and Mayfield. Sekai builds the "TikTok for mini-apps," enabling creators to turn ideas into playable interactive experiences instantly.

Responsibilities

As a Founding Engineer, you will be responsible for architecting and building the native Android experience, implementing complex hybrid integrations, and partnering with AI and design teams to ship high-performance consumer features.

Requirements

  • 5+ years of professional Android engineering experience with deep expertise in Kotlin and the Android SDK.
  • Proven track record of shipping consumer-facing mobile apps and building technical platforms from 0 to 1.
  • Experience integrating hybrid frameworks like React Native or Flutter into native Android environments within high-growth startups.

Qualifications

  • Strong problem-solving skills and ability to work independently and as part of a team.
  • Experience with version control systems such as Git.
  • Knowledge of cloud services and server-side technologies.

Skills

  • Proficiency in Kotlin and the Android SDK.
  • Experience with hybrid frameworks like React Native or Flutter.
  • Understanding of machine learning and AI concepts.

Benefits

  • Competitive salary not disclosed.
  • Equity compensation.
  • Work in San Francisco, USA.
  • Opportunity to work with a world-class team of engineers from Google and ETHDenver.
  • Access to top-tier investors including Khosla Ventures, a16z, Mayfield, and A*.

Pay

Not disclosed.

Schedule

Full-time.

Benefits

  • Health insurance.
  • Retirement plans.
  • Flexible work schedule.
  • Professional development opportunities.

How this works

Jack is an AI agent for job searching and career coaching. He works for you. Jill is the AI recruiter working for the company. She recruits from Jack's network. If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives. We never post fake jobs. This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.

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