What is Sekai?

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.

Here are Sekai’s download links:

• 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

Why We are Hiring?

We’re doubling down on creation quality and reliability. This is a key role with real ownership: the person will run the lane end-to-end and set the technical bar for agent-driven app generation.

You will own

• Designing and owning the agent runtime and orchestration layer
• Building long-horizon agent workflows: prompt → plan → generate → run/validate → repair → publish
• Developing robust evaluation and quality loops including eval harnesses, regression testing, and failure taxonomy
• Designing model strategies including routing, benchmarking, reliability improvements, and cost/latency optimization
• Creating debuggable agent systems with tracing, metrics, alerts, and observability

We’re looking for

• Have experience building agentic systems involving tool use, orchestration, retry/repair loops, and context management
• Are comfortable working with modern agent frameworks, such as
• LangChain, LangGraph, Google ADK, Pi-mono, or Vercel AI SDK
• Are strong engineers in Python or TypeScript
• Have experience shipping and operating production systems
• Have strong product instincts and can translate user experience goals into system
• design decisions

Bonus points

• Built a coding agent, devtool, IDE assistant, or code generation pipeline
• Experience building evaluation frameworks (automated scoring, regression suites, release gating)
• Experience designing MCP-style tool protocols or robust tool interfaces for LLM systems

Compensation & Benefits

• Competitive compensation: salary + equity
• Health coverage: we cover full medical insurance / health insurance