AI Agent Engineer (Coding Agent)

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’re 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 If you are excited about building at the frontier of AI, consumer social, and interactive entertainment, we would love to hear from you. At Sekai, you will work with an AI-native team, move fast, own meaningful problems, and have the flexibility to explore new ideas from an early stage.