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Salary
$110k – $158k per year
Location
In office (London)
Seniority
Staff
Employment
Full-Time
Overview
Company
Impact
Profile match
Klarna is a Swedish financial technology company founded in Stockholm in 2005 that provides payment and shopping services to consumers and merchants worldwide. Its core products let shoppers pay immediately, defer a payment or split a purchase into interest-free instalments, while merchants receive settlement, fraud protection and conversion tooling through a single checkout integration. The group has expanded into a shopping app with price comparison, cashback and a bank offering, holds a European banking licence and listed its shares on the New York Stock Exchange in 2025.

What you will do

As a Senior Data Scientist within our Open Banking team, you will build the analytical foundation that turns raw bank account data into reliable, actionable insight for fraud prevention and underwriting decisions. You will engage in feature engineering across incoming and outgoing cash flows to model affordability, and develop machine learning models that estimate probability of default and produce fraud scorecards. You will own the full lifecycle of these models, from raw data through to production deployment, working closely with engineering to operationalize your work at scale. You will also help monitor model performance, impact, and acceptance rates through dashboards you help build, and you will partner closely with the Credit Modeling and Fraud teams to align on shared goals and infrastructure.

Who you are

  • Experience building and deploying machine learning models end to end, from raw data to production

  • Strong feature engineering skills, ideally with transactional or financial data

  • Proficient in Python and SQL, with experience working in AWS environments

  • Solid understanding of classification modeling techniques for risk or fraud use cases

  • Comfortable partnering closely with engineering teams to bring models into production

  • Strong communication skills, with the ability to work cross-functionally with Credit Modeling and Fraud teams

  • A curious, ownership-driven mindset, comfortable building infrastructure and processes from scratch

Awesome to have

  • Experience with open banking data or affordability modeling

  • Familiarity with building dashboards for model monitoring, ideally with tools like Databricks

  • Experience with monitoring and observability tools such as Datadog

  • Background in underwriting, credit risk, or fraud detection use cases

Please include a CV in English

Curious to learn more about Klarna and what it's like to work here? Explore our career site!

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