AI Engineer

Harrington Starr; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

Harrington Starr partners with an innovative organisation investing heavily in AI to build intelligent products that transform how people work. This hands-on role joins a growing engineering team, delivering production AI applications with real-world impact, using the latest Generative AI capabilities.

You will take ideas from concept through to deployment, shipping production-ready Python code and building scalable AI solutions.

Qualifications

• Commercial experience building AI applications with LLMs and production code.
• Strong Python engineering skills with shipping production-grade code.
• Experience with RAG, prompt engineering, model evaluation or fine-tuning.
• Knowledge of front-end technologies is a plus, and ML fundamentals are essential.
• Degree in CS/Math or equivalent industry experience is expected.

Responsibilities

• Build and deploy production-grade AI applications using modern LLMs.
• Design scalable AI solutions that solve business challenges.
• Evaluate and improve model performance through experimentation and testing.
• Collaborate with users to iterate quickly and deliver high-quality products.
• Keep up to date with developments across the AI ecosystem.

Skills

LLM development

Python engineering

Prompt engineering

Model evaluation

Frontend basics

ML fundamentals

Education

Degree in Computer Science or Mathematics

Tools

Cloud platforms

Modern engineering practices

Job description

We're working with an organisation that’s making a significant investment in AI, building intelligent products that are transforming the way people work. As part of a growing engineering team, you’ll play a key role in designing and delivering production AI applications with real-world impact.

This is a hands‑on opportunity for someone who enjoys taking ideas from concept through to deployment while working with the latest advancements in Generative AI.

The Role

• Build and deploy production‑grade AI applications using modern LLMs.
• Design scalable AI solutions that solve complex business challenges.
• Evaluate and improve model performance through experimentation and testing.
• Work closely with users to iterate quickly and deliver high‑quality products.
• Keep up to date with the latest developments across the AI ecosystem.

What We're Looking For

• Commercial experience building AI applications with LLMs.
• Strong Python engineering skills and experience shipping production code.
• Experience with RAG, prompt engineering, model evaluation or fine‑tuning.
• Knowledge of modern front‑end technologies is beneficial.
• Strong understanding of machine learning fundamentals.
• Degree in Computer Science, Mathematics or another quantitative discipline (or equivalent industry experience).
• Experience with cloud platforms and modern engineering practices is a plus.