Software Engineer, Agent

Sierra Sierra · AI Frontier · Tokyo, Japan · Engineering

Software Engineer, Agent role at Sierra, focused on designing, building, and shipping production-grade AI agents for enterprise customer experiences. The role involves owning the Agent Development Life Cycle (ADLC), partnering with large enterprises and startups, and guiding the evolution of Sierra's core platform. Requires experience building AI/LLM systems in production and strong technical problem-solving skills.

What you'd actually do

  1. Design and deliver production-grade AI agents
  2. Drive the Agent Development Life Cycle (ADLC)
  3. Partner with large enterprises and cutting-edge startups
  4. Build the future of the platform

Skills

Required

  • Experience building or deploying AI/LLM systems in production
  • Strong technical problem-solving skills, especially in fast-changing, ambiguous environments
  • A builder and tinkerer’s mindset with high agency - you find creative ways to overcome obstacles and ship
  • Comfort working directly with customers to understand their needs and solve real-world problems
  • Strong Japanese communication skills - clear, direct, and persuasive across technical and non-technical audiences
  • Experience building and scaling end-to-end production systems

Nice to have

  • Have been a founder or founding engineer - you know what it means to balance craft, ownership, and speed
  • Familiarity with tools that power today's AI agents: eval frameworks, agent tooling, RAG pipelines, and prompt engineering
  • Prior experience with React, TypeScript, and/or Go
  • Previous roles where you interfaced with customers or led technical projects with external stakeholders
  • Strong English communication skills

What the JD emphasized

  • production-grade AI agents
  • Agent Development Life Cycle
  • AI agents
  • AI agent development

Other signals

  • AI agents
  • production environments
  • customer experiences
  • enterprise AI