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Software Engineer, Agent

London💼 Full-time🗓 2025-12-07 → 2026-07-30

Core

Design and deliver production-grade AI agents that are central, mission-critical, and drive revenue for Sierra's platform.

Role type

Senior IC AI Agent Engineer

Builds

Production AI agents for large enterprises and startups across finance, healthcare, and commerce

Domain

AI Agents / LLMs / Enterprise Software

Deliverable

production ML models

Required skills

End-to-end production system building, Technical problem-solving in ambiguous environments, Customer-facing technical work, Creative problem solving

Preferred skills

Building/deploying AI/LLM systems in production, Founder or founding engineer experience, Eval frameworks, Agent tooling, RAG pipelines, Prompt engineering, React, TypeScript, Go

Technologies

React, TypeScript, Go, RAG pipelines, Eval frameworks, Agent tooling

Responsibilities

Design and build AI agents for large telecommunications and media companies, Develop and refine AI agents for complex customer interactions, Create generalizable AI agent frameworks for industry-specific use cases, Experiment with voice models and integrate them at scale

Seniority

Senior, hands-on IC

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