AI Harness Engineer — Build AI Workflows (Remote/UK)

The Citation Group; Wilmslow; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

The Citation Group is seeking an AI Harness Engineer in Wilmslow, with remote UK options. You will help build a system that orchestrates AI agents from brief to proven changes, with human review before anything ships.

You will shape how agents pick up work, handle failures, and improve the flow with observability, testing, and secure coding practices. This is a high-impact role central to our engineering strategy.

Qualifications

• Production experience building agent systems.
• Strong software engineering fundamentals.
• Experience with orchestration and tooling.

Responsibilities

• Design and build the harness to translate briefs into proven AI-driven changes.
• Ensure changes are verified beyond agent output and handle failures gracefully.
• Improve runs by measuring performance and implementing proven improvements.
• Help engineering teams adopt the harness and deploy agents in production.
• Write clean, tested, secure code with strong observability from day one.
• Uphold high engineering standards for AI-native systems.

Skills

Agent systems

Software engineering

Failure handling

Job description

The Citation Group is seeking an AI Harness Engineer in Wilmslow, with remote UK options. You will help build a system that orchestrates AI agents from brief to proven changes, with human review before anything ships.

You will shape how agents pick up work, handle failures, and improve the flow with observability, testing, and secure coding practices. This is a high-impact role central to our engineering strategy.