Senior Data Scientist

Das ist der Job

Lending at SumUp is a mature, scaled business built on a strong credit‑risk foundation.

Darum lohnt es sich

Collaborative and respectful team player who can voice disagreements while committing to team decisions. Additional benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches, and a 1‑month sabbatical after 3 years of service. Referral bonus for bringing talent into the SumUp team.

At SumUp, we’re on a mission to empower small businesses across the globe with simple and affordable tools to help them start, run, and grow. As a Senior Data Scientist, you will be highly hands‑on and embedded in day‑to‑day lending decisions.

What you’ll do Optimize Credit Risk Models: Iterate on existing models to improve stability, predictive power, and net revenue impact while performing deep dives to support risk decisions.

Drive End‑to‑End Deployment: Develop, test, and deploy new model versions in close collaboration with Credit Risk Engineering, ensuring no regressions or operational issues. Enhance ML Infrastructure: Improve machine learning pipelines and workflows to reduce maintenance overhead and failure modes.

Integrate New Data: Evaluate and integrate new internal and external data sources (e.g., credit bureaus, open banking) into existing models and processes. Monitor Performance: Closely monitor models in production, investigating performance shifts or anomalies to maintain portfolio integrity.

Promote Technical Excellence: Document work clearly and participate in code reviews, design discussions, and pair programming to maintain high‑quality standards. What makes you great for this position 5+ years of experience as a Data Scientist (or 7+ years in data‑related/software engineering fields with at least 3 years in Data Science).

Must have experience working with Credit Risk. Deep understanding of Data Science principles, including statistics, probability theory, and machine learning concepts. Strong experience with Python (pandas, PySpark, scikit‑learn) and SQL for complex data retrieval and manipulation.

Proven track record of building, evaluating, and deploying machine learning models end‑to‑end at scale. Experience with credit risk assessment, lending, or financial decisioning models. Strong software engineering practices, including writing clean, maintainable, testable code with version control and documentation.

Fluency in English with the ability to communicate technical findings clearly to diverse stakeholders. Why you should join SumUp Opportunity to work with SumUppers globally on large‑scale fintech products that serve millions of businesses worldwide, from our Barcelona office.

Commitment to Diversity and Inclusion, fostering an inclusive environment where everyone's perspectives are respected. Enrollment in our Virtual Stock Option programme, allowing you to own a stake in SumUp’s future success. A dedicated annual L&D budget of €2000 for your individual development.

A corporate pension scheme where we match up to 20% of your contributions. Generous time off: 28 days of paid leave plus public holidays and special leave days. Equal Opportunity Employer 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. #J-18808-Ljbffr