— Designed and implemented an auto-completion feature for payment forms, enhancing user experience using Cache, RPC, UICollectionView, UITableView and Amplitude, which decreased time to complete transaction by 3-4s for simple forms and by 15s for complex. — Implemented a robust auto-payment feature for communal payments using UIKit, higher-order functions (HOFs), and system design. This innovative solution empowered users to effortlessly set up automated payments for various needs, resulting in over 20 percent of users transitioning to automated payment methods. — As a key member of the installment project team, contributed significantly to the development of an innovative installment widget for the main screen. This widget seamlessly integrates installment payment options and provides users with detailed balance information, leveraging UIKit, WebKit, UI Drag and Drop, User Defaults, and VIP architecture. — Developed a new, streamlined calendar view component, replacing an outdated system comprising 60 files. This technical refactoring significantly accelerated the delivery of the auto-payment feature to production by creating a more reusable and flexible calendar module. The new component has been successfully integrated into both reminders and auto-payments workflows, benefiting iOS developers across the team. — Significantly improved application performance by utilizing Xcode Instruments: Leaks and Time Profiler to identify and eliminate memory leaks and performance bottlenecks. Created detailed documentation to empower other developers in addressing critical issues and maintaining the application's overall health and efficiency.

— Increased user engagement by creating features like QR scanner, Face and Touch ID, Setting bills modules using UIKit, AVFoundation, Compositional Layout, GCD, DispatchGroup which resulted in enhancement of user experience and monthly revenue for 7-9 percent. — Improved data-driven decision making by implementing user actions tracking throughout the whole project with Amplitude and Google Analytics. — In addition, collaborated with the team on another app Altyn-i Business, refactoring legacy code to improve performance and maintainability. — Successfully launched the app on the App Store using CI/CD, Fastlane and UIKit. — Actively participated in project technical planning sessions, code reviews, and the integration of new libraries and helpers. — Additionally, contributed to the team's growth by conducting technical interviews with potential developers.

— Developed and maintained native parts of payment modules for Jusan Tickets, Travel, QR, and Lifestyle features, using UIKit, AVFoundation and WebKit, which resulted in substantial increase of payments team revenue throughout the year for roughly 21 percent.