Senior Data Scientist

In this second-line role, you validate fraud models used to protect payments, logins, and identity at Klarna. You’ll reproduce results, stress-test methodologies, and ensure governance and production readiness across the full model lifecycle. You work closely with first-line teams to surface risks and maintain model trust at scale. You’ll shape...

Klarna is seeking an ML Engineer to tackle technically challenging modelling problems in fintech by training transformer-based models on long sequences of real-world transactional events. You will design tokenisation schemes for numerical, categorical, and temporal features, shaping vocabulary size, sequence length, and information compounding.You’ll...

Klarna is seeking an ML Engineer to tackle technically challenging modelling problems in fintech by training transformer-based models on long sequences of real-world transactional events. You will design tokenisation schemes for numerical, categorical, and temporal features, shaping vocabulary size, sequence length, and information compounding.You’ll...

In this second-line role, you validate fraud models used to protect payments, logins, and identity at Klarna. You’ll reproduce results, stress-test methodologies, and ensure governance and production readiness across the full model lifecycle. You work closely with first-line teams to surface risks and maintain model trust at scale. You’ll shape...

Klarna is seeking an ML Engineer to tackle technically challenging modelling problems in fintech by training transformer-based models on long sequences of real-world transactional events. You will design tokenisation schemes for numerical, categorical, and temporal features, shaping vocabulary size, sequence length, and information compounding.You’ll...

In this second-line role, you validate fraud models used to protect payments, logins, and identity at Klarna. You’ll reproduce results, stress-test methodologies, and ensure governance and production readiness across the full model lifecycle. You work closely with first-line teams to surface risks and maintain model trust at scale. You’ll shape...

Overview As a Senior Data Scientist in Klarna’s Open Banking team, you build analytics that transform raw bank data into actionable insights for fraud prevention and underwriting. You craft features from cash flows, develop production-ready models for default risk and fraud scoring, and own the lifecycle from data to deployment. You collaborate with...

Overview In this role you will shape Klarna’s next‑generation consumer credit scoring and portfolio valuation models. You will build real‑time PD models and calibration frameworks that support underwriting and economic return optimization. Working with cross‑functional teams, you will translate modeling insights into credit policies while mentoring...

Overview In this role you own end-to-end fraud ML solutions from raw data to production, shaping models that operate at scale across hundreds of millions of transactions. You will transform rules-based fraud systems into model-driven architectures and build infrastructure from scratch. You’ll work with engineers, analysts, and stakeholders to translate...