Lead Fullstack Engineer - Javascript

What you will do • Work on specific problem spaces critical to Klarna's needs, with opportunities to switch teams as both you and our fast-paced business evolve. • Lead the design, development, and maintenance of JavaScript-based applications, ensuring high performance, scalability, and reliability across both frontend and backend. • Work with modern technologies such as TypeScript, Node.js, React, and React Native to build seamless and scalable solutions. • Utilize cloud technologies, primarily AWS, to develop and deploy services. • Engage in the full project lifecycle—from conception to deployment and beyond—ensuring projects are delivered on time and to specifications. • Collaborate with cross-functional teams across Klarna to align on integration strategies and optimize system architecture. • Drive an engineering culture within the team, emphasizing innovation, quality, and continuous improvement. • Proactively identify and mitigate potential issues in our distributed and financial systems. • Work in small autonomous teams with short release cycles. Who you are • Proficient in TypeScript and JavaScript, with strong experience in Node.js and modern frontend frameworks (e.g., React / React Native). • Experienced in architecting and building scalable, robust systems across the stack. • Skilled with cloud technologies, especially AWS. • Adept in distributed systems, with the ability to anticipate and mitigate issues proactively. • Independent, able to manage projects end-to-end and contribute to technical direction. • A strong communicator, capable of collaborating effectively across teams and domains. • Experience mentoring others and contributing to a positive engineering culture. • Working proficiency and communication skills in verbal and written English. Awesome to have • Experience with microservices architecture and event-driven systems. • Familiarity with REST and/or GraphQL APIs. • Experience with tools such as Kafka, Docker, Jenkins, Datadog, or Splunk. • Experience working in fintech or other regulated environments. Please include a CV in English. Curious to learn more about Klarna and what it’s like to work here? Explore our career site!