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I'm Moin Omer Habib
a Senior Mobile Engineer
10 Years · Android, Cross-Platform & Backend Development

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About Me.

I'm a Senior Mobile Engineer with 10 years of experience building and modernizing mobile products used by millions. My strongest specialization is native Android with Kotlin, Jetpack Compose, and Clean Architecture, supported by hands-on cross-platform, hybrid app, and backend experience.

My work spans the Open edX Android ecosystem, React Native features, Angular and Ionic apps, and WebView integrations. I've also built PHP REST APIs integrated with Moodle and worked on a Node.js reimbursement claims portal. I collaborate with international product teams on architecture, reliable delivery, and mentoring.

Key Highlights

  • Maintained 99.2%+ crash-free rate
  • Led code reviews to ensure quality and team standards
  • Led CI/CD adoption, reducing release friction by 40%
  • Migrated apps from Java to Kotlin & XML to Jetpack Compose
  • Mentored developers and led Compose migration initiatives
  • Delivered critical features for global edTech & finTech platforms

Open Source Contributions

Engineering Practices

Process & Quality

  • Agile Methodologies Proficient in Scrum and Kanban for iterative and collaborative development.
  • Clean Code & Performance Committed to Clean Code principles and performance optimization for robust applications.
  • Scalable Architecture A strong focus on creating testable, scalable, and maintainable app architectures.

Collaboration & Delivery

  • Code Reviews & Mentorship Lead constructive pull request reviews and mentor junior developers to elevate team skills.
  • Team Collaboration Skilled in project estimation, cross-functional team collaboration, and communication.
  • Continuous Learning Actively explore emerging Android technologies to drive innovation and modern practices.

Core Skills

  • 95%
    Kotlin & Jetpack Compose
  • 90%
    MVVM, Clean Architecture & SOLID Principles
  • 90%
    Unit & UI Testing (JUnit, Espresso, MockK)
  • 85%
    Dependency Injection (Hilt, Dagger 2, Koin)
  • 85%
    CI/CD with GitHub Actions & Firebase

Full Tech Stack

  • Languages

    • Kotlin
    • Java
    • Swift
    • Python
    • JavaScript & TypeScript
    • PHP
    • SQL, XML, JSON

  • Architecture & Patterns

    • MVVM & MVI
    • Clean Architecture
    • Modularization
    • Repository Pattern
    • SOLID Principles

  • UI & Frameworks

    • Jetpack Compose
    • Material Design 3
    • XML Layouts
    • ConstraintLayout
    • Custom Views
    • React Native
    • Angular & Ionic
    • WebView & JavaScript bridges

  • Async & Testing

    • Coroutines, Flow, StateFlow
    • RxJava & LiveData
    • JUnit & Espresso
    • MockK & Mockito
    • Screenshot Testing

  • Tools & DevOps

    • GitHub Actions, Bitrise, Fastlane
    • Firebase Suite (Analytics, Crashlytics)
    • Git, GitHub, GitLab
    • Jira & Confluence
    • Postman & Figma

  • Libraries & APIs

    • Hilt & Dagger 2
    • Retrofit & OkHttp
    • Room & DataStore
    • GraphQL & WebSockets
    • Google Maps & Payment APIs
    • Node.js backend development
    • PHP REST APIs & Moodle integration

Featured Projects.

edX App Banner

edX Android App (Open edX)

edTech

Built and maintained the Android learning experience for a global education platform. Contributed to Java → Kotlin → Compose modernization, modular architecture, and video playback analytics. Integrated WebView course content with JavaScript injection, file uploads, notifications, and offline support.

Cheetay App Banner

Cheetay Android App

Food Delivery, Logistics

Modernized and stabilized a high-traffic delivery platform. Led the transition to Kotlin and Clean Architecture modules, reducing the crash rate from ~6% to under 0.8%. Enhanced cart, checkout workflows, and real-time rider tracking.

CERP App Banner

CERP Survey App

Data Collection, Research

Built a custom Android app for field data collection. Designed for offline-first usage with an encrypted Room database. Integrated BLE device support for biometric data and handled complex UI flows with dynamic form generation.

Sentimeter App Banner

Sentimeter Feedback Kiosk

Retail, Customer Experience

Created a kiosk-mode feedback app locked to a single-app mode with remote config support. Enabled real-time survey updates, Firebase remote logging, and robust offline operation with delayed sync.

Beyond Native Android.

Cross-platform delivery, hybrid integration, and practical backend development.

Schoolgram & Cross-Platform Apps

Angular · Ionic · React Native

Led Schoolgram development with Angular and Ionic, delivering a shared codebase for Android and iOS. Additional cross-platform work includes React Native features and Workstream.

Hybrid Apps & Learning APIs

WebView · JavaScript · PHP · REST APIs

Integrated web course content with native Android capabilities, including input handling, file uploads, notifications, and offline support. Built PHP REST APIs integrated with Moodle for education features.

Reimbursement Claims Portal

Node.js · Backend Development

Worked on an ERP portal covering expense reimbursement, claims, and authentication. This experience complements my mobile work with practical understanding of backend workflows and API boundaries.

10 Years
Years of Experience

Building reliable native, cross-platform, and hybrid mobile experiences.

5M +
Users Impacted

Contributed to global-impact apps used by millions of users worldwide.

99.2 %+
Crash-Free Rate

Maintaining high stability and performance across multiple production apps.

40 %
Release Friction Reduced

Leading CI/CD adoption to streamline and accelerate app delivery cycles.

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