Fraud Prevention Specialist

SumUp; Berlin (NH); On-site; USD 100,000 - 145,000; Full time

Benefits offered by this job

L&D budget

Pension scheme

Paid leave 28 days + holidays

Urban Sports Club subsidy

Kita placement assistance

Office lunches

Sabbatical after 3 years

Referral bonus

Job summary

SumUp is seeking a Fraud Prevention Strategy Specialist in Berlin to shape global fraud strategies for the acquiring business. You will analyze large datasets to identify trends, configure and test decision engine rules, and monitor performance metrics across markets.

The role requires deep experience in fraud prevention, strong SQL/Python skills, and the ability to translate regulations into practical controls.

Qualifications

• Proven experience in fraud prevention, fraud strategy or risk management within payments, fintech or another data driven environment.
• Advanced skills in SQL and Python, including experience working with data pipelines and large datasets.
• Hands on experience configuring fraud decision engines, rule based systems or authentication strategies.
• Strong knowledge of Card Present and Card Not Present fraud patterns across diverse markets, with the ability to apply this knowledge to strategy.
• Ability to balance merchant conversion, approval rates, fraud losses and false positives when making decisions, and to communicate recommendations clearly to technical and senior stakeholders.

Responsibilities

• Shape fraud prevention strategy for SumUp's acquiring business across international markets.
• Analyse large, complex datasets to spot fraud trends, performance shifts and opportunities for improvement.
• Design, configure and test decision engine rules, thresholds and authentication strategies.
• Monitor fraud, chargeback, approval rate and false positive performance to assess strategy effectiveness.
• Investigate root causes of performance changes and recommend clear, evidence based actions.
• Translate regulatory and card scheme requirements into practical fraud controls.

Skills

SQL

Python

Fraud rules

Fraud strategy

Stakeholder comms

Job description

Fraud Prevention Strategy Specialist

Fraud Prevention team · Berlin, Germany (office-first)

SumUp's Fraud Prevention team sits at the intersection of risk, data and global payments, working at pace to stay ahead of one of fintech's most dynamic challenges: stopping fraud at scale across multiple markets and products. In this role, you'll help protect SumUp's acquiring business globally, using data, analytical thinking and fraud prevention expertise to reduce losses while safeguarding approval rates and the experience of our merchants and their customers. You'll work on complex, high impact fraud challenges across international markets, building a deep understanding of fraud performance and turning your analysis into practical strategies that shape how we prevent fraud over time.

What you'll do

• Shape fraud prevention strategy for SumUp's acquiring business across international markets
• Analyse large, complex datasets to spot fraud trends, performance shifts and opportunities for improvement
• Design, configure and test decision engine rules, thresholds and authentication strategies
• Monitor fraud, chargeback, approval rate and false positive performance to assess strategy effectiveness
• Investigate root causes of performance changes and recommend clear, evidence based actions
• Translate regulatory and card scheme requirements into practical fraud controls

You'll be great for this role if…

• Proven experience in fraud prevention, fraud strategy or risk management within payments, fintech or another data driven environment
• Advanced skills in SQL and Python, including experience working with data pipelines and large datasets
• Hands on experience configuring fraud decision engines, rule based systems or authentication strategies
• Strong knowledge of Card Present and Card Not Present fraud patterns across diverse markets, with the ability to apply this knowledge to strategy
• Ability to balance merchant conversion, approval rates, fraud losses and false positives when making decisions, and to communicate recommendations clearly to technical and senior stakeholders

It would be a plus if you have

• Participation in industry working groups, webinars or communities focused on global fraud trends
• Knowledge of acquirer settlement flows and interchange economics
• Experience working with card scheme requirements or regulatory change across international payments markets

Why you should join SumUp

Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup

Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced

Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success

A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education

A corporate pension scheme where we match up to 20% of your contributions

Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days

Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches

Break4me: 1-month sabbatical after 3 years of service

Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

About SumUp

Be empowered to do more that matters.

At SumUp, we’re on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 39 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.

Our commitment to small businesses is reflected in our diverse team of over 4,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.

SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website, and follow our journey on LinkedIn, Instagram, and TikTok.