Principal Data Scientist: AI-Driven Claims Automation

Marshmallow; Greater London; Hybrid; GBP 120,000 - 170,000; Full time

Benefits offered by this job

Bonus scheme

Private medical insurance

Learning budget

Flexible benefits budget

Work From Anywhere

Visa sponsorship

Job summary

Marshmallow is seeking a Principal Data Scientist in London to lead data science across Claims Fraud, designing and deploying ML and Generative AI systems for automated claims processing. You will collaborate with product and engineering to scale decisions, while ensuring robust, testable solutions and measurable improvements.

This role emphasizes ownership, cross-functional influence, and a strong technical leadership mindset.

Qualifications

• Significant commercial experience delivering end-to-end ML solutions in production.
• Hands-on experience with Generative AI systems in production.
• Strong statistical foundation and risk-based decisioning experience.

Responsibilities

• Provide technical leadership for data science across Claims Fraud, shaping risk decisioning.
• Design, build and iterate on production ML and Generative AI systems for claims validation and automation.
• Collaborate with Claims data scientists to align models, data and workflows for scalable decisioning.

Skills

Data science leadership

Production ML

Generative AI

Risk decisioning

System design

Stakeholder management

Tools

Big data tools

ML platforms

Job description

Marshmallow is seeking a Principal Data Scientist in London to lead data science across Claims Fraud, designing and deploying ML and Generative AI systems for automated claims processing. You will collaborate with product and engineering to scale decisions, while ensuring robust, testable solutions and measurable improvements.

This role emphasizes ownership, cross-functional influence, and a strong technical leadership mindset.