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Software Engineer, Agent

London, England, UK💼 Full-time🗓 2026-07-04 → 2026-07-27

Core

Design and deliver production-grade AI agents that drive revenue for Sierra's platform, serving large enterprises and startups across finance, healthcare, and commerce.

Role type

Senior IC machine-learning engineer (AI agents)

Builds

Production AI agents, agent frameworks, and platform features for enterprise customers

Domain

AI/LLM systems, enterprise software, customer experience automation

Deliverable

production ML models

Required skills

End-to-end production system building, technical problem-solving in ambiguous environments, customer-facing technical work, creative obstacle overcoming

Preferred skills

Building/deploying AI/LLM systems in production, founding engineer experience, familiarity with eval frameworks/agent tooling/RAG/prompt engineering, React/TypeScript/Go proficiency, leading technical projects with external stakeholders

Technologies

React, TypeScript, Go, eval frameworks, agent tooling, RAG pipelines

Responsibilities

Design and ship highly performant, reliable, and intuitive AI agents; own the Agent Development Life Cycle from pilot to deployment; partner with enterprise leaders and startups to build custom agent solutions; guide platform evolution based on customer needs and prototype new tools

Seniority

Senior, hands-on IC

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