AI Engineer - Huxley

eFinancialCareers; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Hybrid work

Competitive salary

Equity

Comprehensive benefits

Job summary

Huxley, a trading division of SThree, is recruiting an AI Engineer for a London-based, hybrid role. You will design and build agentic AI systems powering enterprise automation, with LLM workflows, memory architectures, and tool-use capabilities.

Bring strong Python, production-grade software experience, and hands-on Azure OpenAI/Azure ML. You’ll collaborate with product and engineering teams to push the platform forward in a greenfield environment.

Qualifications

• Commercial experience designing and building AI, ML, or generative AI apps.
• Strong Python engineering skills and production-grade software experience.
• Hands-on with Azure OpenAI, Azure AI Services and Azure ML.
• Familiar with LangChain, Hugging Face, PyTorch, or similar technologies.

Responsibilities

• Designing and developing agentic AI systems capable of autonomous decision-making and task execution.
• Building sophisticated LLM-powered applications, orchestration frameworks, memory architectures, and tool-use capabilities.
• Developing custom AI workflows using large language models, retrieval systems, and multi-agent architectures.
• Collaborating with product and engineering teams to embed AI into real-world business processes.

Skills

Python

Azure OpenAI

LLM architectures

Production software

Multi-agent systems

Azure Machine Learning

Prompt engineering

Tools

LangChain

Hugging Face

PyTorch

Azure AI Services

Job description

AI Engineer

London (Hybrid, 1 Day per Week Onsite)

Are you ready to help build the future of AI from the ground up?

Our client isn't buying off-the-shelf solutions or stitching together existing products. They're building a proprietary AI platform from first principles, creating intelligent systems capable of reasoning, planning, and acting autonomously across complex business environments.

We're looking for a highly skilled AI Engineer to join a growing London-based team and play a key role in designing and developing cutting-edge agentic AI systems that will power the next generation of enterprise automation.

What You'll Be Doing

• Designing and developing agentic AI systems capable of autonomous decision-making and task execution.
• Building sophisticated LLM-powered applications, orchestration frameworks, memory architectures, and tool-use capabilities.
• Developing custom AI workflows using large language models, retrieval systems, and multi-agent architectures.
• Collaborating closely with product and engineering teams to embed AI into real-world business processes.
• Contributing to the architecture and evolution of a proprietary AI platform in a truly greenfield environment.
• Evaluating emerging AI technologies and helping shape technical direction and best practices.

What We're Looking For

• Commercial experience designing and building AI, machine learning, or generative AI applications.
• Strong Python engineering skills and experience developing production-grade software.
• Hands‑on experience with technologies such as Azure OpenAI, Azure AI Services, and Azure Machine Learning.
• Knowledge of modern AI frameworks including LangChain, Hugging Face, PyTorch, or similar technologies.
• Deep understanding of LLMs, RAG architectures, vector databases, prompt engineering, agentic AI, and multi‑agent systems.
• Experience deploying, monitoring, and optimising AI solutions in production environments.
• A builder's mindset with a passion for solving complex technical challenges from first principles.
• Ability to commute to a London office once per week.

Desirable Experience

• AI orchestration and workflow frameworks.
• Knowledge graph or semantic search technologies.
• Model fine‑tuning and evaluation.
• MLOps, CI/CD, containerisation, and cloud‑native deployment practices.
• Experience developing autonomous agents and reasoning systems.

Why Join?

• Join a high‑calibre team building a genuinely differentiated AI platform.
• Work on some of the most challenging and innovative problems in modern AI.
• Influence architecture, product direction, and technical strategy from an early stage.
• Enjoy significant ownership, autonomy, and creative freedom.
• Competitive salary, equity participation, and comprehensive benefits.
• Hybrid working with a collaborative London‑based team.

Huxley, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC387148 England and Wales