Senior Web & React Native SDK Engineer

We are looking for a Senior Web & React Native SDK Engineer to own and evolve our Web and React Native SDKs, enabling client and partner applications to integrate reliably with our APIs across browser and mobile environments.

This is a platform / SDK engineering role focused on stability, backward compatibility, and developer experience, ensuring consistent SDK behavior across Web, iOS, and Android platforms.

• Design, develop, and maintain Web and React Native SDKs.
• Build and evolve SDK APIs that wrap REST services for event reporting and personalization.
• Ensure SDK stability, performance, and backward compatibility for client and partner integrations.
• Manage SDK versioning, releases, and dependency coordination across packages.
• Publish and maintain SDK releases via npm.
• Develop and maintain unit and integration tests for shared and platform-specific SDK logic.
• Maintain SDK documentation and developer integration guides.
• Maintain Web and React Native demo applications (JavaScript/JSX) to showcase and validate SDK functionality.
• Collaborate with Backend, iOS, and Android SDK engineers to align cross-platform behavior.

• 5+ years of JavaScript/TypeScript experience with strong proficiency in TypeScript.
• Proven experience building and maintaining SDKs, libraries, or reusable packages (beyond application development).
• Experience supporting React Native on both iOS and Android platforms.
• Experience building browser-based SDKs with cross-browser compatibility considerations.
• Strong experience consuming REST APIs.
• Experience publishing, versioning, and maintaining packages via npm.
• Proficiency with Git and CI/CD pipelines.

• Experience supporting external or partner SDK consumers.
• SDK-level error modeling, logging, and diagnostics experience.
• Experience with package bundling, tree-shaking, and size optimization.
• Familiarity with native bridges in React Native.
• Experience collaborating with iOS and Android SDK teams.