Senior Fullstack Engineer - Javascript

Job-ID: e8255f92-fc44-4f70-b7b8-68d3305f651cLocation: MilanSalary: 65133 - 72950 EURType: Full timePosted: 2026-03-03Contact: [email protected] you will do • Tackle specific problem spaces critical to Klarna’s current needs, with ample growth opportunities in a fast-paced business environment. • Bring innovative ideas from diverse areas, including information retrieval, large-scale system design, data storage/processing, security, artificial intelligence, UI design, and mobile development. • Develop your professional skills in an entrepreneurial organization that encourages working with your areas of interest. • Use state-of-the-art technology to solve real problems for our customers at a massive scale. • Design, develop, test, deploy, maintain, and improve software; take full responsibility for the lifecycle of your code. • Share your knowledge and help the team evolve best practices; act as both a mentor and mentee. • Work in small, autonomous teams with short release cycles. • Contribute to open-source projects: Klarna GitHub. Who you are • Proficient in TypeScript and Node.js. • Experienced with common JavaScript libraries and frameworks. • Skilled in React and React Native. • Knowledgeable in product development, cloud technologies, and microservices. • Passionate about writing clean and testable code. • Familiar with Agile practices, including Pairing, TDD, BDD, Continuous Integration, and Continuous Delivery. Awesome to have • Experience with JavaScript / TypeScript. • Familiarity with React + React Native with Redux. • Experience with Node.js and Express.js. • Knowledge of REST API and GraphQL API. • Familiarity with Kafka, internal design systems, AWS, Splunk, Datadog, Jenkins, and Docker. Please include a CV in English. Curious to learn more about Klarna and what it’s like to work here? Explore our career site!