Sierra Software Engineer New Grad, Agent 2027 | London | £120k–£140k

Sierra Software Engineer New Grad, Agent 2027 | London | £120k–£140k

Sierra builds customer-facing AI agents for large brands. This new-grad seat is on the team that ships those agents into production: design the agent, deploy it with the customer, and keep tuning it after launch. The work is the agent development lifecycle, not a research-only internship.

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The London role is on site. Recent team projects on the posting include churn agents for telecom and media, troubleshooting flows, and voice models wired into enterprise systems. React, TypeScript, Go, and prior LLM production work are listed as extras, not gates.

Eligibility / Key Requirements

• New grad for 2027, able to work on site in London
• Experience building and scaling an end-to-end production system
• Comfort with ambiguous problems and with talking to customers
• Clear writing and speaking for technical and non-technical people
• Preferred: production LLM or agent work, evals, RAG, React, TypeScript, or Go

Compiled from the official posting; verify details on the employer site before applying.

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