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AI / Machine Learning Engineer – Agentic AI & LLM

AI / Machine Learning Engineer – Agentic AI & LLM

Hybrid

London, United kingdom

£ 450 /day

Junior

Freelance

20-02-2026

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Skills

Python Machine Learning PyTorch TensorFlow

Job Specifications

AI | Machine Learning Engineer – Agentic LLM Systems (Contract)

We’re working with a leading tech organisation building agentic AI systems – LLMs that can plan, reason, call tools, and write/execute code. We’re hiring a Machine Learning Engineer to help design and scale these systems into production.

You will:

Design and build tools, workflows, and infrastructure for agentic LLM systems
Work with researchers to diagnose and fix failures in agent-generated code
Develop frameworks for tool-calling, multi-step planning, and orchestration
Build and run experiments to improve reliability, latency, and success rates

What We’re Looking For:

4+ years’ experience in ML/AI (LLMs, recommender systems, optimisation, or similar)
Proven hands-on work with LLM agents / tool-using models / orchestrated workflows
Strong Python with PyTorch or TensorFlow
Comfortable debugging complex, distributed ML systems
Experience running and analysing large-scale ML experiments
Master’s (or PhD) in Computer Science, AI, ML, or related field

Contract Details:

£400 - £450 Per Day (Outside IR35)
6 Months Initial Contract | + Extensions
Hybrid | London

Please apply for immediate consideration.

About the Company

Experis is a global leader in IT professional resourcing, project solutions and managed services. As the need for IT skills accelerates, we help organisations transform their digital infrastructure, enterprise applications, cloud and cyber security. Through Experis Academy, we deliver the powerful combination of in-demand technical skills together with the soft skills that are critical for business success. Experis is part of ManpowerGroup, a Fortune 500 Global Business and world leader in innovative workforce solutions. Know more