Ivan I.

DIRECTV: - Contributed to the DIRECTV project with a focus on defect resolution and subsequent new feature development. - Added several native features for handling PIP mode and detecting key press events on different platforms - Key contributor to the successful migration of the application to three distinct new platforms, demonstrating proficiency in cross-platform deployment. - Invested significant effort in performance profiling and optimization, implementing enhancements that yielded measurable improvements in application responsiveness and resource utilization. - I also assisted with React Native upgrades, improved code quality through custom ESLint rules, new build time babel plugins, participated in the TypeScript migration, and consistently performed code reviews.

Banking mobile app Mobile business banking application allows to add up to 5 accounts on the device, view transactions, share account details, make existing/new payee payments, transfer money between accounts, open banking AISP/CBPII/PISP, feature dated payments, international payments. Achievements: • made an accessibility first approach in the mobile application - people with disabilities can use it without any discomfort. • added various automated tests: unit, e2e, performance. • analized security problems after pen-testing and resolved them • implemented logic to share some common screens between mobile banking and open banking app flows. • improved performance: in list components, the FPS dropped to 0. After the changes, the FPS remains around 30 and there are no blank areas(while scrolling really fast). Optimized re-renders and form components. • smooth and animated layouts are built. Al animations in the application are done in the Ul thread, and the JS thread always shows 60. Technologies: React Native, React-Query, Redux-toolkit, Reanimated 2, Jest, detox, typescript, lottie, moti, hook-form, deep linking, push notifications, firebase, CI/CD Axiance Trading application where users can have several accounts, both real and demo to try trading on you own. Verification by using ML services by photo and region, passing a basic questionnaire with remembering previous answers, dark theme, RTL support, support for more than 5 languages, buying company shares, cryptocurrency, replenishment of wallet with payment services, real time chat with support team. Achievements: • developed and adopted application for dark theme and internationalization support. • implemented high performance lists with web socket connections and multiple views support. Technologies: React Native, GraphQL, Redux, Redux toolkit, Apolo client, typescript, react-native-app-tour, dark theme, localization, web socket connection, react-native-app-tour, i18n, charts

Front-end development using HTML5, CSS, JavaScript, PHP, Open Server, Git , XMLHttpRequest, fetch, cookie, sessions.