Flutter Developer passionate about building smooth, scalable, and high-performance mobile applications.
I love working with clean UI, optimized architecture, and reliable functionality.
Author of 4+ pub.dev packages, contributor to Flutter Core, and active open-source enthusiast.

Champion – MIST Leetcon 2023
1st Runner-Up – IUTCTF 2024 (Cybersecurity CTF)

• Email: sabiturrahman60@gmail.com
• Blog: sabitur.com/blog
• GitHub: github.com/RootHex200
• Twitter: twitter.com/RootHex200
• LinkedIn: linkedin.com/in/roothex200

• Contributed bug fixes to official Flutter framework
  PRs: #175706, #175303

• Added new features & fixed bugs for Android and iOS video player SDKs
  • bunny-stream-android
  • bunny-stream-ios

• flutter_bunny_video_player
• vimeo_player_flutter
• voice_recognition_flutter

Expertise: Dart • Flutter • Android
Familiar: REST API • Laravel • CI/CD
Comfortable: Kotlin • Native Android • Clean Architecture • Web Security • Test Code (Mockito)

(Sept 2024 – Present)

• Built 70% of Klasio LMS (SaaS) mobile app (Android/iOS).
• Created reusable internal packages → 40% reduced dev time.
• Integrated native components via platform views → 40% performance boost.
• Enhanced video player + custom HTML rendering → 30% better engagement.

Live Apps:

• Klasio Student – Play Store
• Klasio Student – App Store
• Nurul Quran Academy – Play Store

(Feb 2024 – Aug 2024)

• Contributed 30%+ to OrderWala & Team OrderWala.
• Used Clean Architecture, BLoC, Isolates, Debouncer.
• Implemented real-time location tracking & printing → 25% productivity boost.
• Improved overall performance and user experience.

Live Apps:

• OrderWala – Play Store
• Team OrderWala – Play Store

• Champion – MIST Leetcon 2023 (CTF Event)
• 1st Runner-Up – IUTCTF 2024 (CTF Event)