Principal AI Engineer

Tenth Revolution Group; Greater London; On-site; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Equity

Job summary

Tenth Revolution Group in London is seeking a Principal AI Engineer to own the architecture behind production-grade autonomous agents. You will shape the long-term technical direction and build an engineering team capable of delivering trustworthy AI at scale.

You will work closely with the CTO, drive architectural decisions, and deliver secure, reliable AI systems across enterprise environments. This role focuses on real ownership and high-impact technical leadership.

Qualifications

• Experience delivering production-grade autonomous agents and LLM-powered systems.
• Strong focus on reliability, monitoring, and secure operation in an enterprise context.
• Proven ability to design and own architecture end-to-end.

Responsibilities

• Own critical architectural decisions for autonomous agents.
• Mentor and grow the AI engineering team in London.
• Collaborate directly with CTO and founding team on system design.
• Lead evaluation, monitoring and improvement of agent performance.

Skills

Agentic AI

Evaluation & reliability

Systems engineering

LLM optimisation

Agent security

Tools

Python

LangGraph

Agent orchestration

Tool calling

TypeScript

PostgreSQL

Google Cloud

Job description

I'm representing a well-funded AI startup in Central London building a next-generation enterprise AI platform, bringing people, autonomous agents and business-critical systems together.

We're looking for a Principal AI Engineer who wants to go beyond LLM integrations and take genuine ownership of the architecture behind production-grade autonomous agents.

Building an AI agent that works is relatively easy. Building one you can trust to operate autonomously, securely and reliably across an enterprise? That's an entirely different engineering challenge.

• A very attractive package including equity, with the opportunity to join a business with genuine unicorn ambitions.

The key skills we're looking for:

• Agentic AI: Production LLM systems, Python, LangGraph, agent orchestration and tool calling.
• Evaluation & reliability: Agent trajectory evaluations, error analysis, retrieval and generation quality, and production monitoring.
• Systems engineering: TypeScript, Python, PostgreSQL, queues and Google Cloud infrastructure.
• LLM optimisation: Experience across multiple model providers, balancing quality, inference costs and latency.
• Agent security: Sandboxed execution, permissions, tool integrations and human-in-the-loop approvals.

Why this opportunity stands apart:

You'll work directly with the CTO and founding team, own critical architectural decisions and help build and mentor an exceptional AI engineering team.

This isn't about inheriting somebody else's architecture. It's about defining what the architecture should become.

Central London | Principal AI Engineer

If you're an engineer who gets more excited about solving the difficult problems behind AI than the hype surrounding it, I'd welcome a confidential conversation.