Head of Data (Data Science) London– Hybrid Up to £120,000 About the Company We are working with a fast-growing AdTech scale-up on a mission to revolutionise B2B advertising with a cutting-edge, privacy-first platform. Backed by top-tier venture capital and industry pioneers, they work with high-profile clients and are rapidly scaling to become a market leader in their space. Founded recently, they’ve already achieved impressive revenue milestones and are positioned for significant growth, including international expansion plans in the near future. This is an exceptional opportunity to join a dynamic company at a pivotal stage in their journey. The Role As Head of Data, you’ll play a key role in driving the company’s data strategy and leading their growing Data Science team. This is a hands-on leadership role, blending technical expertise with strategic vision to deliver impactful data-driven solutions. Key Responsibilities Lead data and machine learning projects that align with business objectives. Apply classical machine learning techniques alongside large language models (LLMs) and multimodal datasets (text, audio, video, geospatial). Oversee large-scale data gathering and web scraping projects central to the company’s growth. Mentor and develop a team of 3 Data Scientists, fostering a culture of collaboration and innovation. Partner with cross-functional teams to integrate data insights into strategic decision-making. About You We’re looking for an experienced data leader who can thrive in a fast-paced, greenfield environment. The ideal candidate will have: 5 years of experience in Data Science, including classical ML and LLMs. A track record of managing data teams and delivering impactful projects. Experience in venture-backed or high-growth software businesses (preferred). A STEM degree (MSc or equivalent), ideally from a top university. A hands-on, adaptable approach and excellent leadership skills.