Software Engineer

November 7, 2026

Office

Senior

London, United Kingdom

Indeed

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Office-only work

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Description

The Guardian team builds practical safety and oversight systems for increasingly capable AI agents, enabling longer-running, higher-autonomy work while preserving meaningful safeguards. The Software Engineer will design and build production systems that evaluate agent behavior, identify risk, and take appropriate action without creating unnecessary friction for users. This is a hands-on engineering role spanning architecture, implementation, evaluation, and operations, working closely with alignment researchers and cross-functional product, security, and infrastructure teams.

Responsibilities

Design systems, balancing safety, product utility, latency, and operational reliability
Build production systems that evaluate agent actions in real time, detect potentially harmful behavior, and support safe recovery or escalation paths
Improve how oversight systems understand user intent, environmental context, permissions, and personalization signals while protecting privacy
Partner closely with alignment researchers to turn prototypes, evaluations, and new monitoring techniques into scalable product capabilities
Work across Product, Security, Infrastructure, and other engineering teams to integrate Guardian capabilities into agent experiences
Develop evaluations covering safety, false positives, latency, and user impact
Own projects end to end, contribute to technical direction and design reviews, and investigate failures to improve system behavior and reliability

Requirements

Experience building and shipping complex production software with ownership across design, implementation, deployment, and operation
Built with AI agents or large language models in a core product, startup, or technically serious independent project
Strong software engineering fundamentals and ability to design reliable backend services, APIs, and infrastructure
Sound product-engineering judgment across safety, usability, speed, and reliability tradeoffs
Experience with software development or architecture
Debugging and investigating failures to improve system behavior and reliability
Comfort solving problems where both the requirements and the underlying technology are evolving
Clear cross-technical communication and initiative in ambiguous situations