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Senior Data Analyst, Transaction Monitoring & Fraud

United Kingdom; Spain; Czechia · Job Posted June 16, 2026
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Job Description

Mews is looking for a Senior Transaction Monitoring Fraud Data Analyst to join our FinCrime team within Fintech. This is a high-impact role for someone who can use data to improve fraud detection, reduce false positives, and help the team focus on the cases that matter most. You’ll work at the intersection of fraud operations, analytics, and product, using SQL, Python, and strong problem solving to identify patterns, improve rules, and support better decision making.

Job Responsibility

  • Analyse transaction monitoring and fraud rule performance to identify gaps, inefficiencies, and opportunities to improve detection
  • Investigate trends, anomalies, and behavioural patterns across transactions, properties, and customer activity
  • Help improve how we prioritise cases by risk, with the goal of reducing manual review volumes and increasing focus on high-risk activity
  • Partner closely with FinCrime, Product, Compliance, and Data teams to improve controls and bring in new data sources
  • Work with data engineers and other technical teams to support better pipelines, data quality checks, and more reliable monitoring inputs
  • Support the development of internal scoring approaches and future machine learning use cases as the function evolves
  • Translate complex analysis into clear recommendations that improve fraud prevention while minimising friction for legitimate customers

Requirements

  • Strong experience in fraud detection or transaction monitoring analytics
  • Proven ability to improve rules, controls, or detection logic using data
  • Advanced SQL skills
  • Strong Python skills
  • Experience working with large datasets to identify patterns, outliers, and risk signals
  • Ability to move from analysis to action, not just reporting findings
  • Confidence working cross-functionally with operational, technical, and compliance stakeholders

Nice to have

  • fintech
  • payments
  • buy now pay later
  • e-commerce
  • transaction monitoring or fraud solution providers

What we offer

  • Participation in our company share program
  • Best-in-class parental leave (6 months fully paid for primary caregivers, 2 months for secondary, available within your first year)
  • Unlimited paid holiday (yes, really)
  • Work from anywhere - enjoy the flexibility to work from other countries for a few weeks each year through our compliant and flexible Workation policy
  • Relocation options available after 1 year
  • Monthly 'EDGE' time - dedicated to Explore, Develop, Grow, and Elevate yourself
  • Flexible, hybrid working options
  • One-off home office setup budget to make your workspace your own
  • Monthly working-from-home and healthcare allowances (where local healthcare benefits are not in available)

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