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# Senior AI Engineer

- **Company:** Harnham
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £80,000.0 - £115,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Python (Programming Language), Performance Tuning, Large Language Models, Prompt Engineering, Speech Synthesis
- **Published:** September 2, 2026
- **Apply:** https://www.reed.co.uk/jobs/senior-ai-engineer/57301015

## About the Role

* Strong commercial experience building AI, NLP, or LLM-based products
 * Hands-on experience with modern foundation models and AI frameworks
 * Experience with fine-tuning, prompt engineering, or instruction tuning
 * Strong Python engineering skills
 * Experience evaluating and improving model performance
 * Excellent communication skills and ability to work with non-technical stakeholders
 * Experimental mindset and a passion for building high-quality AI products

Desirable experience includes speech technologies, generative audio, multimodal AI, or content-focused AI applications.

Skills

 * LLMs
 * Text-to-speech

## Description

You will:

 * Build and fine-tune LLM-powered applications and services
 * Develop and optimise RAG pipelines
 * Deliver style and tone modelling solutions to improve LLM outputs
 * Support personalisation, summarisation, and real-time generation initiatives
 * Work closely with product, engineering, and business stakeholders
 * Contribute to multimodal and audio-focused AI projects
 * Help define evaluation frameworks and model quality standards