• Develop and maintain high-performance, secure Android apps for decentralized banking.• Collaborate with backend team to integrate APIs and microservices.• Translate designs into high-quality code with the UX/UI team.• Optimize app performance and fix bugs for stability and responsiveness.• Implement robust security measures for user data and transactions.• Assist in displaying blockchain data in the app.• Incorporate KYC/AML systems in collaboration with compliance team.• Participate in code reviews and team meetings.• Stay updated with industry trends and best practices in mobile and DeFi development.Technology Used: Kotlin, Android Studio, Java, Firebase, Google AR, Jetpack Compose, Glide, Landscapist, ConstraintLayout, ViewPager, Biometric, SplashScreen, Retrofit, OkHttp, Lottie, CardSlider, AutoFitTextView, Shimmer, WalletConnect, OneSignal, Intercom, RxJava, RxAndroid, RxKotlin, TedPermission, RootBeer, Sceneform (AR), MPAndroidChart, Gson, Room, JUnit, Espresso, Mockito

Contracted via Photon InfotechTechnologies Used: Kotlin, Android Studio, Java, Volley, MVVM, Firebase, Android Jetpack Components, jetpack Compose, StateFlow, LiveData, Navigation Component, JUnit, Mockito, ProGuard/R8, Gradle, Git/GitHub, Material Design, Object-Oriented Programming, Accessibility.• Collaborated in the development and maintenance of Citi's Android application, focusing on clean and maintainable code.• Assisted in migrating legacy systems to native platforms, embracing modern design patterns.• Contributed to crafting user interfaces, enhancing the user experience across client mobile apps.• Applied advanced architectural principles to develop app functionalities.• Conducted comprehensive unit, integration, and ADA testing to ensure application stability.• Worked alongside the team on both legacy and greenfield projects, aiding in technical decisions.

Developed and maintained end-of-life planning Android application using clean, maintainable code.• Delivered all output with high quality and speed, bringing the best value to services.• Implemented reactive user interfaces with biometric authentication.• Collaborated with backend to implement user interfaces and business logic.• Investigated and fixed bugs and maintained system. Performed integration testing.Technologies Used: Kotlin, Android Studio, MVVM Design Pattern, Android Jetpack Components, jetpack Compose, StateFlow, Material Design, Dagger2, Firebase, Retrofit2, OkHttp, Biometric Authentication, Object-Oriented Programming, Native Android Development, ROOM, Coroutine, LiveData, Data Binding, Navigation Component, Kotlin Flow, Espresso, JUnit, Mockito, ProGuard/R8, Git/GitHub, Continuous Integration/Continuous Deployment (CI/CD), Accessibility, Paging, WorkManager, Leak Canary

Developed new features and maintained existing Android application, an IoT app which connects to Bluetooth devices installed in chairs and collects posture data, allowing posture review and correction.• Led team of mobile engineers through supervision and task assignment, ensuring all tasks are finished with accuracy and speed.• Implemented complete Android app, including device integration and visualization.• Coordinated with backend team. Fixed bugs and maintained finished system.Technologies Used: Kotlin, Hilt, Coroutine, Firebase, Retrofit2, OkHttp, ROOM, Android Studio, MVVM Design Pattern, Android Jetpack Components, Material Design, Object-Oriented Programming, Native Android Development, LiveData, Data Binding, Navigation Component, Kotlin Flow, Espresso, JUnit, Mockito, ProGuard/R8, Git/GitHub, Paging, WorkManager.

Implemented new features in a news app that uses Machine Learning to personalize and filter content.• Developed user interfaces for multiple app sections, working with backend developers to coordinate applicable business logic.• Identified and researched bugs, ensuring the repair of all technical issues.• Maintained existing applications to all industry standards.Technologies Used: Kotlin, Koin, Coroutine, Firebase, Retrofit2, OkHttp, ROOM

Designed and developed mobile fitness app, from technical specifications through launch.• Managed user interfaces and business logic integration throughout application.• Researched and selected technologies, comparing functionality to ensure the best choice.• Deployed successful Vingo project to both Korean and USA play store.Technologies Used: Kotlin, RxJava, RxKotlin, Facebook SDK, Kakao SDK, OneSignal, Jenkins, AppLovin, Fitbit SDK, Samsung Health SDK, AndroidX, Firebase, Retrofit2, OkHttp, Zendesk, Socket.IO

-Project 2 (Jan 2018 - Feb 2019): Deep Learning Measurements System • Developed a system for processing images to calculate volume, aiding moving companies in price estimation. • Applied YOLO, Mask R-CNN, and Faster R-CNN algorithms with the COCO dataset for object detection. • Technologies Used: Android, Python, Java, TensorFlow, Caffe-Project 1 (Feb 2017 - Dec 2017): Advanced CCTV Asset Management System • Created and maintained a system for real-time video and audio broadcasting for government asset management. • Integrated server-side C# monitoring with client-side Android broadcasting and NFC communication modules. • Technologies Used: C#, Java, Kotlin, Android.

The team works mostly in the automated installation of SBG on Sim and Target. Another responsibility is to support the environment for the test and development of CI and dev users, fixing Trouble Tickets from other stakeholders and test cases.Skills:• IDE: Vim• Scripting language: Bash• Methodology: Agile• OS: Linux, Docker• Techniques: Automation Installation and Configuration, Simulation, Cloud, Network configuration and troubleshooting• Version Control: Git• Visualization: VirtualBox, KVM, LxC, Cloud-based on OpenStack• Target: Ericsson System Test Plant (STP)• Review Tool: Gerrit• Collaboration tool: Skype for business, Skype, Slack, JIRA, Wiki• Remote access: NX, Citrix• Bug tracking system: MHWeb

Operated and maintained OCS system.• Collaborated with three major vendors (ZTE, Huawei, Ericsson) to deploy 3 trial OCS systems.• Deployed hardware and integrated with Viettel internal networks.• Migrated 1 million subscribers from legacy to new OCS system.Technologies Used: Tcpdump, Wireshark

Developed 2 modules in the SMS Facebook project, where mobile users can connect via SMS.• Implemented SMS gateway and Social Network gateway modules which processes MO/MT text messages between SMSC, mobile users, and Facebook system.• Acted as contact point between Viettel Global and major vendors and service providers.Technologies Used: Java, SMPP, Graph API Facebook, SVN, NetBeans