Machine Learning Engineer

Applied Machine Learning Engineer - London (Hybrid) - 60,000

Im working with a fast-growing, founder-led start-up thats on a mission to make digital ads actually enjoyable tackling one of the biggest challenges in adtech: building a higher-quality, more intelligent ad-funded internet.

Theyre now hiring their first ever Applied Machine Learning Engineer someone curious, hands-on, and ready to own all things ML from day one.

What youll be doing:

• Building and deploying applied ML systems that make the product smarter and more defensible
• Developing contextual categorisation of web content
• Prototyping algorithms to optimise ad performance and bidding logic
• Applying modern LLM techniques from prompt engineering to retrieval-augmented generation (RAG)
• Working cross-functionally with engineers, product and commercial teams to bring ideas to life

What theyre looking for:

• 13 years experience in applied ML/AI (or equivalent projects)
• Strong Python skills with PyTorch, Hugging Face or scikit-learn
• Experience experimenting with LLMs (fine-tuning, embeddings, prompt chaining etc.)
• A passion for turning messy real-world data into something powerful and production-ready
• Excitement about being the first ML hire in a scaling start-up environment

Why youll love it:

• Real ownership from day one build, shape and scale the ML function
• Hybrid setup (London-based, flexible culture)
• 33 days holiday + Christmas shutdown
• Private medical, pension, socials, offsites & more

If youre ready to apply your ML skills in a high-impact, creative environment where ideas move from concept to production fast Id love to chat.

Applied Machine Learning Engineer - London (Hybrid) - 60,000