We are redirecting you to the source. If you are not redirected in 3 seconds, please click here.

Senior Mobile App Developer at OnBuy. OnBuy is on a mission to disrupt the eCommerce space with a fair, transparent, and seller-friendly marketplace. As we continue to scale, we’re investing in our mobile experience to better serve our customers and sellers. We're now looking for a talented Senior Mobile App Developer to join our growing tech team and lead the evolution of our mobile apps.. . . Key Responsibilities:.  . . Lead the development and maintenance of high-quality mobile applications from concept through to launch.. . Build robust, scalable, and performant apps for both iOS and Android platforms using Swift and Kotlin.. . Collaborate with backend and frontend teams to ensure seamless integration across the full stack.. . Implement and maintain WebView-based functionality while planning for a transition to more native app features.. . Integrate with Firebase services including Cloud Messaging, Realtime Database, and App Distribution.. . Manage app deployment pipelines using CI/CD tools like Fastlane and GitLab CI, including code signing and store submissions.. . Ensure secure coding practices and compliance with platform guidelines.. . Debug and resolve issues using platform-specific tools and logs.. . Implement features such as push notifications, deep linking, and gesture recognition.. . Support the wider development team with front-end tasks when needed, using HTML, CSS, and JavaScript.. . Contribute to architectural decisions and help shape the future of mobile at OnBuy. . Experience and Skills:.  . Essential. . . Proven experience developing and launching mobile apps for both iOS and Android.. . Frontend experience (with CSS, HTML and JavaScript. Vue.js — a big bonus). . Strong proficiency in Swift (iOS) and Kotlin . . Experience working with Android Studio, Xcode, and Apple Developer Console.. . Solid understanding of the differences between iOS and Android ecosystems.. . Experience with Firebase, including FCM, App Distribution, and Realtime Database.. . Familiarity with CI/CD pipelines, automated testing, and deployment processes.. . Experience using tools like Fastlane to automate testing, building, signing, and publishing.. . Comfortable working in a start-up or scale-up environment with a fast-paced, agile approach.. . Excellent problem-solving skills and the ability to think algorithmically.. . Working knowledge of HTML, CSS, and JavaScript to support front-end development when required.. . Desirable. . Full stack experience (including backend). . Experience with hybrid frameworks (e.g. React Native, Flutter) and integrating native functionality.. . Familiarity with analytics tools and performance monitoring for mobile apps.. . Contributions to open-source projects or a portfolio of published apps.. . . . Company Location: United Kingdom.