Principal Engineer-Client Platform
Pubblicato il 15-08-2026 - jobtraffic in Milano
Job-ID: 63ee736e-dab5-437f-a5e6-beff8c6cd460Location: Stockholm; MilanSalary: 1076536
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- 1248781 SEKType: Full timePosted: 2026-02-18Contact: you will do Own and evolve core parts of the Klarna client platform with a strong React Native focus, shaping foundational capabilities used across the app ecosystem.
Solve complex, cross-cutting technical problems that impact developer experience, stability, scalability, and long-term maintainability of the platform.
Lead large initiatives spanning JavaScript and TypeScript, frontend build tooling, native iOS and Android integrations, and CI/CD pipelines.
Balance short-term delivery needs with long-term platform strategy, ensuring solutions are sustainable and aligned with the broader evolution of the Klarna app.
Act as a technical multiplier by providing mentorship, conducting thoughtful code and architectural reviews, and guiding engineers toward high-quality platform standards.
Who you are A React Native and frontend platform expert with strong platform thinking and a hands-on mentality.
Deeply knowledgeable about React Native internals, including how it builds, runs, and integrates with iOS and Android.
Highly proficient in JavaScript and TypeScript, with a strong understanding of runtime behavior and architecture patterns.
Experienced with frontend build systems and tooling, including bundlers, transpilers, Babel, Metro, and Webpack concepts.
Comfortable debugging complex runtime and build-time issues across the JavaScript to native boundary.
Proven in evolving React Native at scale, including managing upgrades, shaping architecture, and improving tooling.
Solid in basic AWS fundamentals such as compute, IAM, networking, monitoring, and database basics.
Familiar with CI/CD pipelines and modern delivery practices.
Knowledgeable in security and privacy fundamentals.
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