Senior Data Scientist

As a Senior Data Scientist part of a Fraud Prevention cross-functional team, you will be responsible for developing, deploying, and maintaining models to detect fraud in card-not-present transactions across various markets. Daily tasks include monitoring and evaluating the performance of existing models, retraining and improving models, collaborating with strategy stakeholders to develop risk policies, and conducting feature engineering to identify and adapt to new fraud patterns.

Your routine will include

• Developing and maintaining fraud detection models using machine learning techniques.
• Monitoring, evaluating, and enhancing the performance of fraud models in production.
• Collaborating with cross-functional teams, including risk management, product, and operations, to design and refine risk policies.
• Performing extensive feature engineering to adapt to emerging fraud trends and market conditions.
• Continuously improving data pipelines, ensuring reliable and scalable solutions.
• Providing insights and recommendations to support fraud prevention strategies.

You will be great for this role if you have

• Proven experience as a Data Scientist in a production environment, with a track record of building, deploying, and maintaining machine learning models effectively.
• Proficiency in Python, with strong production-ready coding skills, ensuring the ability to create scalable and efficient solutions.
• Experience with data manipulation, statistical analysis, and machine learning techniques applied to real-world scenarios.
• Experience with Pyspark is a plus.
• Experience with Tableau or other data visualization tools is a plus.
• Domain expertise in fraud detection, financial crimes, or compliance is a plus.
• Familiarity with cloud platforms (e.g., AWS, GCP) and experience deploying machine learning models in such environments is a plus.
• Willingness and ability to thrive in a collaborative, in-office environment (hybrid work model, 3x a week at the office).

Why you should join SumUp

• We’re a truly global team of 3200+ people from 80+ countries, spread across 4 continents.
• The opportunity to work on large-scale fintech products used by millions of small businesses around the world.
• A dedicated annual Learning & Development budget (R$10.000/year) for attending conferences and/or advancing your career through further education.
• Enrollment in our virtual stock ownership program – you will own a stake in SumUp’s future success.
• Access to the SumUp Sabbatical, our employee assistance program for mental health as well as fitness and language learning benefits.
• You’ll attend global offsites and/or hackathons.

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a ‘team-first’ attitude, our diverse teams across Europe, South America, Australia and the United States work together to ensure that the small business owners we partner with can be successful doing what they love. 

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of 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. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate. 

Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.