Startups · AI

AI Agent Engineer (Coding Agent)

Sekai · San Francisco · On-site

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About Sekai

SEKAI revolutionize how digital twins are being built, used and scaled! Backed by a16z speedrun.

About the role

We're doubling down on creation quality and reliability. This is a key role with real ownership: you'll run the lane end-to-end and set the technical bar for agent-driven app generation. We want people who think in systems, not solutions. How do we generate fully autonomous software for recreational use? How do we generate it fast? And how do we do it tastefully? This role lives at the bleeding edge of what current AI can do — if those questions excite you, it's for you.

What they're looking for

  • You've built agentic systems — tool use, orchestration, retry/repair loops, context management — whether on raw provider APIs or frameworks like LangGraph, PydanticAI, Google ADK, Pi-mono, or Vercel AI SDK
  • You understand the tradeoffs well enough to know when the framework gets in your way. Experience with distributed / real-time systems
  • A research-and-ship mindset: you treat open-ended problems as experiments, and you care as much about getting the result into production as discovering it Strong software engineering fundamentals, with depth in Python and/or TypeScript
  • A track record of shipping and operating production systems A history of owning hard problems end to end — you can point to systems you built and the outcomes they drove, not just the tech you touched
  • Strong product instincts: you can translate user-experience goals into system-design decisions
More about this role

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.

Android: https://play.google.com/store/apps/details?id=chat.sekai.app&hl=en_US

IOS: https://apps.apple.com/us/app/sekai-create-remix-play/id6504506653

We're doubling down on creation quality and reliability. This is a key role with real ownership: you'll run the lane end-to-end and set the technical bar for agent-driven app generation. We want people who think in systems, not solutions. How do we generate fully autonomous software for recreational use? How do we generate it fast? And how do we do it tastefully? This role lives at the bleeding edge of what current AI can do — if those questions excite you, it's for you.

Designing and owning our agent harness layer Building long-horizon agentic workflows with maximal autonomy

Developing robust evaluation and quality loops, including...

Read the full posting on Sekai's site ↗

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