Software Engineer, Agent

Sierra Sierra · AI Frontier · London, United Kingdom · Engineering

Software Engineer, Agent role at Sierra, focused on designing, building, and shipping production-grade AI agents for enterprise customers. This role involves owning the Agent Development Life Cycle (ADLC), partnering with clients to solve business challenges, and contributing to the evolution of Sierra's AI platform. The work includes developing agents that outperform humans, handle complex interactions, and integrate new technologies like voice models.

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 and scaling end-to-end production systems
  • 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
  • Excellent communication skills - clear, direct, and persuasive across technical and non-technical audiences

Nice to have

  • Experience building or deploying AI/LLM systems in production
  • Have been a founder or founding engineer
  • 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

What the JD emphasized

  • production-grade AI agents
  • Agent Development Life Cycle
  • build AI agents that transform how they operate at scale
  • AI agents for large telecommunications and media companies that consistently outperform human agents
  • AI agents capable of navigating complex customer interactions
  • generalizable AI agent frameworks
  • new agent architectures
  • self-service capabilities
  • generative agent development
  • latest voice models and figure out how to integrate them at scale

Other signals

  • design and deliver production-grade AI agents
  • Agent Development Life Cycle (ADLC)
  • build AI agents that transform how they operate at scale
  • build the future of the platform
  • AI agents for large telecommunications and media companies that consistently outperform human agents
  • AI agents capable of navigating complex customer interactions
  • generalizable AI agent frameworks
  • new agent architectures
  • self-service capabilities
  • generative agent development
  • latest voice models and figure out how to integrate them at scale