Senior Full-Stack Engineer - Partner Reporting / Merchant Analytics

What you will do Own and evolve data pipelines that power Klarna’s externally-facing dashboards used by hundreds of thousands of merchants worldwide. Participate in all Partner Reporting initiatives, optimizing data flows to improve scalability, reliability, and standardization across markets and merchant segments. Build and maintain ETL / ELT pipelines that transform raw Klarna event and transaction data into merchant-ready KPIs such as funnel metrics, and customer insights. Automate and simplify complex reporting, replacing manual or semi-automated workflows with robust, production-grade data products. Collaborate closely with Data Modeling, Product Analytics, and Product Engineering team s to streamline pipelines, remove unnecessary transformation layers, and improve end-to-end data efficiency. Apply strong SQL-based analysis and feature engineering to ensure metrics are correct, explainable, and trusted — internally and externally. Help shape the foundation of a merchant analytics platform that goes beyond reporting: uncovering consumer trends, identifying high-intent shoppers, measuring campaign effectiveness, and enabling data-driven recommendations for partners. Tech Stack Python (must-have) SQL (must-have; complex analytical queries at scale) REACT (nice-to-have; basic front-end development Airflow (or equivalent orchestration tools) Batch and ELT-style pipeline patterns Experience with workflow schedulers, jobs, and dependency management AWS (S3, Redshift, IAM, etc.) Redshift (or similar analytical data warehouses) Jenkins for CI/CD and pipeline automation Git-based workflows and production deployment best practices Who you are Proven experience as a Data Engineer building and operating production-grade data pipelines. Strong ownership mindset over mission-critical data products, primarily batch-based, with an appreciation for scalability and reliability. Deep comfort with data modeling, schema evolution, metric definitions, and data quality in analytical environments. Hands-on experience optimizing SQL-heavy pipelines and reducing unnecessary transformation layers. Ability to collaborate effectively with analytics, product, and engineering stakeholders — translating business needs into durable technical solutions. Prior experience in fintech, payments, or regulated environments is a strong plus, but not required. Excellent analytical thinking, problem-solving skills, and the ability to communicate complex data concepts clearly. Please include a CV in English. Curious to learn more about Klarna and what it’s like to work here? Explore our career site!