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Lead Software Engineer - JavaScript

KlarnaMilan, ItalyOnsite
We are on a mission
to liberate humanity from all the meaningless time spent managing their purchases and finances, so they can do more of what they love. Klarna was founded on a bold belief: that people are capable of achieving the extraordinary, even when faced with the seemingly impossible. Our journey has been one of continuous learning, facing immense challenges head-on, dedicating countless hours of hard work, and never wavering in our commitment or resilience - and now we are looking for individuals to join us on our journey and contribute to our mission.

As a Lead Software Engineer, you will be responsible for leading the development and optimisation of our software applications, with a strong focus on scalability, reliability, and performance. You will be at the helm of driving technical decisions, managing projects, and ensuring the delivery of high-quality code. This role requires a blend of technical expertise, leadership abilities, and a forward-thinking approach to handle challenges effectively and contribute to the strategic direction of our engineering efforts.

Key Responsibilities:


  • Kafka Expertise: Demonstrate in-depth knowledge of Kafka, including its configuration, traffic management, and the production/consumption of topics.
  • Node.js, TypeScript, and Jest Proficiency: Possess deep understanding and hands-on experience with Node.js, TypeScript, and Jest for building and testing applications.
  • Database Mastery: Show expert-level knowledge of databases, especially PostgreSQL and DynamoDB, including design, optimisation, and management.
  • Project Leadership: Lead projects with a self-driven approach, managing stakeholders, anticipating technical debt, and crafting a technical roadmap to navigate and mitigate these challenges efficiently.
  • Mentorship and Collaboration: Mentor colleagues, enhancing team capabilities, and fostering a collaborative environment. Conduct demos, presentations, and contribute to the creation of comprehensive documentation.
  • Quality and Testing: Uphold a strong commitment to quality through extensive knowledge of testing methodologies and an unwavering attention to detail.

To succeed in this role, we think you should have:


  • Demonstrated experience in leading complex software projects.
  • A strong advocate for technical excellence, innovation, and continuous learning, with a track record of mentoring engineers towards achieving their career goals.
  • Exceptional analytical and strategic thinking skills, with the ability to balance short-term goals with long-term vision.
  • Proven ability to navigate complex organizational dynamics and build consensus among stakeholders with differing viewpoints.
  • Cross-Functional Collaboration: Work closely with other engineering teams, product management, design, and operations to ensure our technology stack integrates seamlessly
  • Strategic Technical Leadership: Play a pivotal role in shaping the technological direction of the team by contributing to the strategic planning and decision-making processes.

Some of the technologies you’ll get to work with:


  • JavaScript/ TypeScript
  • Node.js and Express.js
  • Jest
  • React and React Native
  • AWS, Splunk, Ansible, Terraform, Jenkins, Docker and Kubernetes

*** We know some people might not think they tick every box (ie coming from a non-JS background). We'd still love to hear from you.How to apply: please send us your CV or LinkedIn profile in English.Relocation: Unfortunately we do not offer relocation for these roles and would need suitable applicants to have the right to work in the EU i.e Citizenship, Residency, EU Passport, Bluecard etc

About Klarna


Since 2005 Klarna has been on a mission to revolutionize the retail banking industry. With over 150 million global active users and 2 million transactions per day, Klarna is meeting the changing demands of consumers by saving them time and money while helping them be informed and in control. Over 450,000 global retail partners, including H&M, Saks, Sephora, Macys, IKEA, Expedia Group, and Nike have integrated Klarna's innovative technology to deliver a seamless shopping experience online and in-store.

For more information, visit Klarna.comIt is our commitment that every qualified person will be evaluated according to skills regardless of age, gender, identity, ethnicity, sexual orientation, disability status or religion. Please refrain from including your picture and age with the application.

About Engineering at Klarna


Engineering at Klarna is an inspired, customer focused community, dedicated to crafting solutions that redefine our industry. Working in small, highly collaborative Agile teams, you and your team will have a clear mission and ownership of an important outcome that supports Klarna and our customers. At Klarna we optimise for quality, flow, fast feedback, focusing on end-to-end ownership, continuous improvement, testing, monitoring, and experimentation. We aim for teams that are inclusive, helpful, and have a strong sense of ownership for the things they build. Check out what it's like to be an engineer at Klarna here.

Apply for this job

Life at Klarna

We are Klarna. A global tech bank on a mission to make payments and shopping as smoooth as possible. - We're one of the world's true unicorn companies - We’re valued at over $2.5bn and we're growing by 40% a year - We have more than 2000 employees from more than 70 countries - We process more than a million transactions a day - About 10,000 people are buying with Klarna at any moment of any day - We have developer centres in Stockholm, Berlin and Linden If you're as excited about the future as we are, join us! It’s a hell of a ride.
Thrive Here & What We Value1. Flat hierarchies with knowledge sharing, internal technical talks2. Harmonious team environment with regular employee events3. Generous parental leave for all genders4. Continuous improvement learning-focused culture5. Quality, flow, fast feedback, end-to-end ownership6. Inclusive growth from failures7. Collaborative Agile teams8. Ownership of outcomes supporting Klarna and customers9. Relocation support for employees10. Bold decision-making by developers
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