Led a comprehensive refactor of the application codebase, enhancing maintainability and scalability. Identified, analyzed, and resolved critical performance issues, boosting the application's performance score from 45 to 90. Successfully migrated the React Native framework from version 0.63 to 0.72.4, ensuring the application is up-to-date and leveraging the latest features and improvements. Built a complete feature flow for app notifications using Apple Push Notification Service (APNS), enhancing user engagement and communication. Developed high-performance functions to interact with and process large volumes of real-time data efficiently, ensuring seamless and responsive user experiences. Collaborated with the Technical Solution Manager (SM) on technical suggestions for UI/UX improvement to enhance the product and elicit positive feedback from stakeholders.

Developed a digital banking application from scratch. Implemented Universal Link Dynamic for multiple environments and domains. Built an internal React Native library using Native code to integrate with the React Native app. Integrated core banking platforms and third-party systems. Conducted training sessions and shared technical knowledge with the team. Measured and optimized application performance.

Worked collaboratively with the team to rebuild the Fonos app (version 3), implementing a new codebase, enhancing the UI, and ensuring scalability. Contributed to design discussions focusing on application architecture, UI structure, and code organization. Utilized React Native debugging tools like Profiler, React Native Performance, and Flipper to identify and resolve performance issues, notably fixing a critical app responsiveness problem after launch. Developed comprehensive test plans for new features, ensuring smooth releases, and collaborated closely with QA for quality assurance. Supported the marketing team with technical solutions for executing promotions within the app, implementing remote configuration techniques for seamless updates. Engaged with Customer Support to gather user feedback, driving bug fixes and feature enhancements to meet user expectations. Collaborated closely with the QA and QC teams, offering support in testing and resolving bugs and implementing new features.

Developed and shipped new features to enhance user experience Rebuilt the user interface for the Nami application Optimized codebase and improved app performance by handling real-time data in the price list

Create the structure of the source code to implement the project. Review the code of team members. Collaborate with team members to execute tasks. Communicate with Business Analysts to clarify requirements. Support team members.

- Coding - Testing - Collaborated closely with the QA and QC teams, offering support in testing - Resolving bugs - Implementing new features

Developed two mini-games, "Momo City" and "Momo Academy," utilizing React Native with React Native Reanimated v1 and React Native PanGestureHandler. These games featured smooth animations and interactions, ensuring a seamless gaming experience even on low-end Android devices. Actively participated in the development of Momo App v3, which introduced a new application architecture with the inclusion of Platforms and mini-apps. Built the Momo Contact API to facilitate contact data synchronization with the server and provide a means for mini-apps to access and manage contact information. Worked closely with the Product Owner team to develop new and improved features within these mini-apps. Engaged in design discussions, contributing valuable insights on application architecture and providing input on key decisions. Collaborated closely with the QA and QC teams, offering support in testing and resolving bugs and implementing new features. Worked in close partnership with the Product Owner team to implement new functionalities, including money transfers, cash-in from banks, and loyalty programs.