Data Scientist -Fraud @ Klarna

Data Scientist -Fraud

Data Science - Data Science · Stockholm · Full-time · kr 611,050 SEK - kr 843,151 SEK

OverviewApplication

What you will do

• Build and deploy ML models to protect Klarna’s customers from fraudulent activities (e.g. account takeover or identity theft fraud).
• Independently drive data science projects, from problem definition until deployment.
• Monitor, maintain, and retrain existing ML models in production.
• Explore, engineer, and test new potential features to predict fraud or increase conversion.
• Communicate with stakeholders on conceptual design, development, deployment, and risk control of the model, including writing documentation for external parties.
• Maintain the engineering platform/system used by the team to stay compliant with the company’s requirements.
• Explore novel ML/AI solutions to detect fraud.

Who you are

• Have an advanced degree (Master or Doctorate) in a quantitative field (e.g. statistics, computer science, engineering, mathematics, physics, or related fields).
• 2+ years of experience as a Data Scientist, ML Engineer, or related roles, preferably in the financial sector.
• Proficiency in ML end-to-end process from conceptual design to model development, deployment, and monitoring.
• Good understanding of business value to deliver: know when an ML solution is needed and when the model is good enough to be deployed for production.
• Good understanding of what metrics to use for model monitoring.
• Strong Python and SQL skills, including familiarity with ML modeling packages (e.g. scikit-klean, LGBM) and CI/CD or deployment tools (e.g. Docker, Jenkins, and uv).
• Familiarity with Github and AWS Cloud Computing (Sagemaker, Lambda, S3, Athena, etc).
• Ability to communicate effectively with Analysts, Engineers, and non-technical roles.
• Willingness to collaborate across different locations and time-zones (US and EU), but you will be working at common office hours in your time-zone. Traveling for one or two weeks per year may be needed to meet in-person with other group members.
• Willingness to take ownership of a project and deliver results with minimal supervision.
• Agile to adapt to new changes in technology or engineering platforms used by the company.

Awesome to have

• Experience working in fraud-related problem space, cyber security, and/or payment-related business, e.g. BNPL, credit card, or P2P transfer.
• Experience in handling large sizes of customer data (>100 millions transactions with a few hundred features).
• Technical experience on utilizing Gen AI, Graph Network, Anomaly Detection, or Behavioral Biometrics into production (beyond just prompting, fine-tuning, or proto-typing solutions).
• Familiarity with AI productivity tools for coding, e.g. Cursor or Github co-pilot.
• Familiarity with compliance and regulation around personal data privacy and model bias.
• Experience in mentoring junior data scientists.

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