Senior Fraud Data Analyst

We’re Capital on Tap. Capital on Tap started to help small businesses with financial products that better fit their needs. We offer a business credit card, spend management platform, savings product, and other tools to help small business owners run easier. We have 1,000+ employees, £20bn in annual card spend, 200,000+ customers, and are profitable.

Location: Hybrid role based in our London offices (EC1Y 8LZ), 3 days a week.

What You’ll Be Doing

• Write complex SQL queries to interrogate transaction and customer data, identify fraud signals, and surface emerging attack patterns.
• Design and build fraud detection rules from scratch, set thresholds based on data, and iterate based on live performance.
• Own rules end‑to‑end; build detection, monitor outcome.
• Work across card and lending data to understand customer behaviour and fraud risk in our product set.
• Contribute to fraud st...