Data Scientist – Inside IR35

Senior Data Scientist - Contract Rate: £485 per dayIR35: Inside IR35Duration: 6 MonthsLocation: London We are looking for an experienced, hands-on Senior Data Scientist to join a high-profile technology organisation on an initial 6-month contract. This is a high-autonomy role focused on running existing business-as-usual analytics and data science across international markets, with responsibility for revenue visibility, regulatory reporting, data quality and maintaining a suite of production ML models. The successful candidate will be comfortable taking ownership of existing processes and systems, working independently and delivering against tight deadlines with minimal hands-on support. Key Responsibilities Analytics Monitor revenue performance across international markets and investigate anomalies, providing early visibility of revenue movements. Support partner monitoring and escalations, including offer setup, recommender administration, click-report issues and partner ranking changes. Monitor email campaign performance, investigating anomalies, send failures, re-targeting opportunities and churn drivers. Support experimentation and A/B testing, including experiment monitoring, analysis and promotion decisions. Maintain data quality by investigating pipeline failures, tracking gaps and partner feed issues. Support data requests, customer/member queries and regulatory reporting, including DSAR/RTBF requests, complaint data and FCA regulatory returns. Monitor marketplace rankings and provide analytics support against tight, sometimes same-day deadlines. Represent analytics in business reviews and stakeholder meetings, translating technical findings into clear business recommendations. Data Science Maintain and support an existing suite of production ML models, including scheduled refreshes, retraining and redeployment. Monitor model performance and drift, identifying and escalating issues where models require attention. Maintain data quality across model inputs and pipelines, troubleshooting feed and pipeline issues. Support partner ranking changes and credit-model compliance requirements. Ensure models, pipelines and reporting are fully documented and handed over to the permanent team at the end of the engagement. Essential Skills & Experience 5+ years' experience across Data Science and Analytics, including experience running production models and BAU analytics. Strong experience taking ownership of existing BAU processes and delivering with minimal supervision. Strong SQL and Python or R skills. Comfortable working with existing codebases, data pipelines and production environments. Hands-on experience maintaining production ML models, including refreshing, retraining, monitoring and troubleshooting models. Strong understanding of model performance monitoring, model drift and data quality. Excellent written and verbal communication skills. Degree or advanced qualification in a quantitative discipline such as Computer Science, Mathematics, Statistics, Physics or a similar subject, or equivalent professional experience. Background within technology, financial services or a data-driven organisation. Desirable Experience Experience using AI tools such as Claude Code, OpenAI or similar to automate day-to-day workflows. Understanding of agentic AI workflows. Previous contract or consulting experience delivering BAU projects against fixed deadlines. Experience working cross-functionally with Product, Marketing, Business Development, Compliance, Engineering and Customer/Member Support teams. Experience working within regulated environments and supporting regulatory reporting. The Opportunity This is an excellent opportunity for a Senior Data Scientist who enjoys hands-on ownership rather than purely project-based data science. You will take responsibility for keeping critical analytics, reporting and production models running across an international business while working closely with senior stakeholders. 6-month contract | £485 per day | Inside IR35 *Rates depend on experience and client requirements