Transaction Monitoring and Fraud Analyst

Transaction monitoring and fraud prevention at scale is genuinely hard. The data is noisy, the patterns shift, and the choices you make directly affect which risks the business carries. As Mews grows its payments volume and customer base across new markets, the FinCrime function has a more consequential job to do — and this role is at the centre of it.

You'll own the day-to-day review of transaction data, account behaviour, and payment trends that keeps Mews and its customers protected. That means working across a broad set of signals — chargeback rates, false positive rates, rule performance — to understand not just what's happening but why, and what to do about it. You'll work closely with the broader FinCrime team, contributing to the improvement of detection rules and the practices the team relies on.

The problem this role solves is straightforward to describe and genuinely complex to execute: stopping fraud and financial crime while minimising friction for legitimate customers, across a payment platform operating at growing scale. Good judgement here comes from data, from regulatory awareness, and from the ability to stay grounded when the picture is incomplete.

What you would do

Review and monitor transactions, customer accounts, and payment activity to detect suspicious patterns and potentially fraudulent behaviour

Track key fraud metrics — including chargeback rates, false positives, and defense rates — to reduce risk and minimise losses

Conduct investigations into flagged transactions and accounts to assess whether fraud or financial crime has occurred

Build and improve Business Rules, tracking their performance and iterating as the business scales

Prepare ad-hoc deep-dives and regular reporting on payment trends and KPIs

What you would bring

Experience in data review and interpretation; working knowledge of SQL or Python is a strong advantage

Familiarity with transaction monitoring and fraud prevention tools

Experience investigating complex fraud cases and managing them through to resolution

You already use AI regularly, with approaches you repeat and outputs you check rather than accept at face value

Attention to detail and the ability to stay grounded when assessing a transaction or account without letting assumptions take over

Nice to have

Knowledge of global payment systems, rules, and regulation (AML/CTF or card scheme rules)

Spain

€32.000—€55.000 EUR

UK

£35,000—£47,000 GBP