Karol Kubicki

AI-powered art discovery iOS application. The app was built using Swift, SwiftUI, Swift Concurrency, Core Data, and other native technologies. I was responsible for the whole product development, including UX and user flow, as well as delivering high-quality code and products.

An iOS app for Toptal's talent network that allows users to browse and apply for jobs, review payments, interview for a job, access community content, and more. The app is written in Swift, UIkit, and SwiftUI. It uses GraphQL as a networking layer, and the code was well-tested through unit tests, snapshots, and high-level UI tests.

I was a crucial team member since the beginning of the project. I participated in architectural decisions, design reviews, feature specifications, and technical decisions. I also introduced SwiftUI to the project, immensely speeding the development time. Finally, I led and implemented a cross-platform initiative using Kotlin Multiplatform to share logic between iOS and Android, which resulted in less code repetition and logic mismatch.

The first Toptal mobile app created for VIP clients that allows a blazingly-fast start of the hiring process. The app was written in Swift and UIkit. It heavily used beautiful animations to convey the message of exclusivity and high-end service. The app used multiple external services to synchronize the hiring statuses.

I was the primary co-author of the testable architecture. I created the testing framework for VoIP and other services, allowing the app to run entirely offline.

An iOS, Swift-based app for sleep health and inducing specific dreams. I was the lead developer responsible for the overall direction of the mobile app. The app used in-house trained ML models to predict the sleep cycle and perform specific sounds based on that.