Principal Data Scientist

About the role

The Principal Data Scientist will provide technical leadership within the Claims team, focusing on automating the claims journey through traditional machine learning and Generative AI. This role involves partnering with Product and Engineering to design, build, and scale robust AI systems while ensuring high standards of statistical rigour and system-level thinking. The successful candidate will drive technical strategy to improve risk decisioning and fraud detection, contributing to the company's long-term vision for automated claims handling.

Responsibilities

• Provide technical leadership for data science across Claims Fraud, shaping the approach to risk decisioning and fraud detection in partnership with Product and Engineering
• Design, build and iterate on production ML and Generative AI/LLM systems that support claims validation and automation
• Collaborate closely with other Claims data scientists to bring system-level thinking to how models, data and workflows fit together, identifying architectural improvements needed to scale decisioning and reduce time-to-production
• Be vocal about the platform and tooling investments needed to achieve AI-driven end to end claims automation
• Advocate for robust, scalable, and strategically aligned technical solutions in cross-functional discussions
• Set a high bar for statistical rigour, experimentation and measurement, helping improve how Claims performance and uncertainty are understood and communicated to senior stakeholders

Required skills

• Machine Learning
• Generative AI
• LLM
• Risk-based decisioning
• System design
• Stakeholder management

Benefits

• Bonus scheme
• Private medical insurance
• Mental health support
• Personal learning budget
• L&D days
• Monthly flexible benefits budget
• 25 days holiday
• Work From Anywhere

About the Company

Marshmallow is a unicorn financial services company founded in 2017 that has grown to over 700 employees. The company focuses on insurance and car loans, with a goal to become one of the largest financial services providers in the world.