Applied LLM Specialist

Applied LLM Engineer
Location: London, England (Hybrid)
Contract: Fixed term Contract; 4-6 months initially
Rate: Daily Rate (Outside IR35)

Our client, an award-winning advertising company, are hiring an Applied LLM Engineer to join their team on a 4-6 month fixed-term contract in London. The successful candidate will take full ownership of the technical solution, designing and delivering an AI platform that automates advertising creations while incorporating human-in-the-loop feedback to maintain high-quality outputs.

Responsibilities

• Lead the architecture, development and delivery of the company's platform.
• Design and build LLM-powered workflows for AI-assisted advertising generation.
• Implement human-in-the-loop feedback loops, capturing accept/reject decisions and rationale to continuously improve output.
• Deliver a web-based application with downloadable assets or shareable links.
• Ensure the platform maintains brand compliance and design quality, achieving approximately 95% AI accuracy with designer sign-off.
• Collaborate directly with designers and stakeholders to refine and optimise outputs.
• Take full ownership of all technical decisions and delivery outcomes.

Skillset

• Strong experience in full-stack software engineering.
• Hands-on experience deploying LLMs or Applied AI in production environments.
• Experience with AI-driven content generation, preferably visual or design-focused.
• Ability to design feedback-driven learning systems with human-in-the-loop processes.
• Strong product mindset, able to translate business needs into functional software.
• Comfortable collaborating with end users and non-technical stakeholders.
• Familiarity with Gemini, OpenAI, or similar LLM platforms is a bonus.
• Background in creative, design or media production environments is a plus.