Full Stack Data Engineer – AI Research | £92K | Contract to Dec 2025 | Hybrid London (3 Days Onsite) We’re hiring a Full Stack Data Engineer to join an elite AI research team in London. You’ll be hands-on with end-to-end pipeline development—onboarding, filtering and packaging massive datasets (text, image, video) that will power LLM agents used in cutting-edge automation and FAIR research. This isn’t your average data role—it’s technical, research-focused, and sits right at the intersection of data engineering and software craftsmanship. What's in it for you? • Annual Salary up to £92,000 doe • Length: Through December 2025, with possibility of extension • Contract Type: Inside IR35 - PAYE - paid via Principle HR on a weekly basis • Location: 3 days onsite, Central London What you’ll be doing: • Build Python-based data pipelines to ingest and filter high-risk datasets • Clean, transform, validate and repackage data (text/image/video) at scale • Work closely with data engineers and researchers to mitigate risk in datasets • Deliver production-grade filtering solutions with minimal overhead • Participate in daily research discussions—this is an engineering-first role with a research edge Ideal profile: • Solid Python engineer with proven experience in data pipelines • Comfortable across the stack: you can build tools, services, scripts—not just run notebooks • Skilled in dataset wrangling, filtering, and data quality control • Exposure to machine learning or FAIR/LLM-style projects is a strong advantage • Experience with JavaScript or PyTorch is a bonus, but not required • Able to thrive in a fast-paced, highly collaborative research team No fluff. No layers. This is a sharp role with full access to the research team. If you’ve got full stack capability and a passion for data integrity at scale—let’s talk. Apply Now with your CV or LinkedIn profile today. Som | som@principlehr.com