Chargeback Specialist

We are a London-based fintech company with a mindful approach to financial services. Operating under a FCA-approved Electronic Money Institution (EMI) license, MADFIN delivers card acquiring tailored for fast-moving, high-growth businesses. Our company keep growing and we are expanding our Chargeback team!

Key Responsibilities

• Oversee the full chargeback and dispute lifecycle for Visa and Mastercard.
• Track fraud, chargeback, and transaction activity to spot emerging risks and trends.
• Set up and maintain fraud prevention rules and merchant controls.
• Ensure compliance with Visa and Mastercard monitoring programmes and scheme thresholds.
• Investigate suspicious activity and coordinate corrective action with merchants and internal teams.
• Communicate and exchange information with related departments.
• Produce fraud and chargeback reports and help improve and automate related processes.

• Experience in fraud prevention, chargeback and dispute management, or a related role within payments, fintech, acquiring, or a PSP for at least 1 year.
• Experience working with VROL and Mastercom.
• Good understanding of Visa and Mastercard acquirer dispute processes, fraud monitoring programmes, and scheme requirements.
• Experience analysing card transactions, CNP fraud, and chargeback data to identify patterns and potential risks.
• Familiarity with fraud prevention tools, transaction monitoring systems, and merchant controls.
• Strong investigative, analytical, and problem-solving skills, with careful attention to detail.
• Confident communication skills and the ability to work with merchants and cross-functional teams.
• Good command of written and spoken English.
• Proficiency in Microsoft Excel or Google Sheets; experience with reporting or data analysis tools like Grafana is an advantage.

• Competitive salary based on your experience and contribution and performance-based bonuses
• Flexible working conditions (on-site Riga/hybrid)
• Excellent health insurance after successful completion of the probation period - including extensive medical coverage, mental health support, and dental care
• Additional paid Wellbeing Days - take time for your personal needs, health check-ups, or simply to recharge
• Friendly and collaborative team - we value transparency, initiative, and support each other
• Gifts from the company for work anniversaries and birthdays — because milestones matter, and we love celebrating them with you!