AI Models Lead

Salary: £100,000 - 100,000 per year

Requirements

• We require proven experience fine-tuning machine learning and large language models in production environments.
• We require a strong track record of deploying AI models at scale and understanding real-world failure modes.
• We require hands-on experience with Generative AI and LLM architectures and frameworks.
• We require strong Python engineering capability and familiarity with ML tooling such as HuggingFace, PEFT, TRL, and W&B.
• We require experience working in cloud environments, with AWS preferred.
• We require the ability to operate as a player-coach, combining deep technical expertise with leadership.
• We require a pragmatic mindset and comfort working in ambiguous, evolving environments.
• We require excellent communication skills and the ability to engage senior stakeholders and influence direction.

Responsibilities

• We design and lead the end-to-end model fine-tuning strategy, including SFT, LoRA, QLoRA, and optimisation approaches.
• We select and evaluate base models such as Mistral, Qwen, Phi, and Falcon based on performance, cost, and use case.
• We define evaluation frameworks and standards to ensure models meet production-grade quality and reliability.
• We build and scale a suite of fine-tuned models to support multiple product use cases.
• We own experiment design and reproducibility, including tracking, benchmarking, and iteration cycles.
• We work closely with data, domain, and product teams to translate real-world requirements into model behaviour.
• We lead, mentor, and grow a team of ML Engineers while remaining hands-on technically.
• We drive models through to production environments, ensuring robustness, scalability, and performance.

Technologies

• AI
• AWS
• Cloud
• Support
• LLM
• Machine Learning
• Python

More

We are a highly successful and growing software organisation investing heavily in a cutting-edge AI capability at the heart of our product suite. This is a rare opportunity to join us at an early stage as a foundational hire and help build our fine-tuning capability from first principles. The role is hybrid and Midlands-based, with 2 to 3 days in the office, or available on remote contracts for candidates outside of 35 miles. We are offering a permanent position with a salary of up to £120,000 plus bonus and benefits. You will work on real-world AI use cases where accuracy and trust genuinely matter, with high visibility and direct exposure to senior leadership and strategic initiatives. We are making significant long-term investment in AI-driven innovation and are looking for someone who wants to shape how models are developed, evaluated, and deployed in regulated environments.

last updated 24 week of 2026