‭●‬ Worked ‬‭closely with ‬‭cross-functional teams‬‭ across‬ ‭multiple locations within an‬‭ Agile Environment to‬‭ analyze and‬ implement ‬‭Samsung Account Service‬‭ which are running on over‬ ‭50M+ Devices.‬‭●‬ ‭Built and optimized‬‭ APIs‬ ‭for‬‭ Samsung Account‬‭ in‬ ‭Java / Kotlin,‬‭ a gateway for all Samsung Services, ensuring robust‬ security with ‬‭JWT, OAuth 2.0, PKCE and Device Attestation.‬‭●‬ ‭Developed‬‭ REST API’s‬‭ for several features, ‬‭including‬‭ Product Registration‬‭,‬‭Two-Factor Verification‬‭, ‬‭Signed-In‬ Devices‬‭, and‬‭ Remote Sign-Out‬‭, applying best practices ‬‭in API design.‬‭●‬ ‭Designed and Implemented Single Sign-On‬‭ modules with ‬‭IPC APIs ‬‭for a ‬‭Seamless Samsung Account ‬‭Experience‬ ‭across all Samsung Applications, powering‬ ‭over 30M+‬‭Galaxy Wearable devices. Introduced scope based‬‭ token‬ ‭caching‬‭ and leveraged ‬‭RxJava‬ ‭multi-threading, resulting in a remarkable ‬‭300% faster API response ‬‭time and a‬‭ 500%‬ reduction‬‭in server api calls.‬‭●‬ ‭Revamped and‬‭ optimized‬ ‭the‬‭ Wearable Manager Sync Module‬‭, a cross-device‬‭ SSO ‬‭solution, enabling seamless‬ account synchronization across terminals,‬‭ introduced a‬‭ request queue system ‬‭for efficient handling of multi-process‬ requests from Wearable Manager to Samsung Account, ‬‭adapted in ‬‭3 projects‬‭(Hearable, Fit, and Band Plugin), results‬ in a ‬‭300% reduction ‬‭in production costs.‬‭●‬ ‭Developed‬‭ SA_SDK ‬‭for‬‭ iOS‬‭, enabling Samsung Account Services on iOS devices, ‬‭expanding market reach‬‭ for‬ ‭SmartThings devices.‬‭●‬ ‭Done‬ ‭code reviews, unit testing‬‭, and proactive issue resolution, improving‬‭ software quality‬‭ and refactoring

Responsible for Samsung Account SDK development in iOS featuring secure authentication and authorization.- Maintained OAuth2.0 standards and PKCE.- Used different type of encryption/decryption (e.g. AES, SHA256 etc.), obfuscation techniques.- Used NSURLSessionDataTask, NSUserDeafults, Keychainstorage, SFSafariViewController, WKWebView etc.- Objective-C and Swift interoperability inside framework withmodule mapping.- Used XCTest for unit test.- XCFramework for supporting in macOS (for M1 processor).- Follow standard code conversation and prepare diagram (e.g.DLD) to graphically represent the flow.