Rahim Ullah

Professional summary

I build mobile applications and the backend systems that support them, using Flutter and native Android alongside Laravel and Node.js. My work connects user interfaces, APIs, content management, and monetization. I take projects through integration, testing, client review, and launch preparation, drawing on freelance experience in app development, testing, and publishing.

Technical skills

Mobile development

Flutter · Dart · Android · Kotlin · Java · Jetpack Compose

Architecture and state management

Clean Architecture · MVVM · Riverpod · Offline synchronization

Backend and APIs

Node.js · Express.js · Laravel · REST APIs · Admin systems

Databases and cloud services

PostgreSQL · MySQL · MongoDB · Drift / SQLite · Firebase · Supabase · Cloudflare Stream

Payments and monetization

RevenueCat · Stripe · In-app subscriptions · Purchase restoration · ASO

Development and delivery tools

Git / GitHub · Android Studio · Xcode · VS Code · Google Play Console · TestFlight

Professional experience

Selected projects

1. Shalom Artist

   A music streaming app with a Laravel content administration system.

   Android & backend development

   • Built native Android audio streaming, background playback, offline downloads, and playlists.
   • Developed the Laravel admin panel for music, members, subscriptions, and notifications; handled testing and Google Play publishing.

   Stack Android · Java · Laravel · Firebase

   Shalom Artist case study

2. Tikdating

   A social dating app combining profiles, short videos, and conversations.

   Original native Android app & backend development

   • Built the Java/XML Android app with a vertical video feed, matching, messaging, and WebRTC calling.
   • Developed Laravel APIs and administration for profiles, video content, and moderation, with Firebase authentication and notifications.

   Stack Android · Java · Laravel · Firebase · WebRTC

   Tikdating case study

3. B3G TV

   A Flutter streaming application for live TV and on-demand video on Android and iOS.

   Flutter development & streaming integration

   • Integrated HLS playback and Cloudflare Stream video delivery with a Supabase content backend.
   • Implemented RevenueCat subscriptions, playback access controls, purchase restoration, and cached entitlements.

   Stack Flutter · Supabase · Cloudflare Stream · RevenueCat

   B3G TV case study

4. Caafihub

   A pharmacy platform spanning web and mobile applications.

   • The platform includes separate admin and wholesaler web applications, plus a Flutter retailer application.
   • A Laravel backend is deployed on a VPS.

   Stack Flutter · Laravel

5. AJOracle

   Ongoing

   A mobile streaming platform project.

6. Vekzi

   An email outreach platform bringing leads, campaigns, and conversations into one workspace.

   Founder, Product Designer & Full Stack Developer

   • Designed and built lead management, a guided campaign builder, reusable templates, and message personalization.
   • Implemented a unified inbox, campaign analytics, and administration with a Next.js frontend and Express.js backend.

   Stack Next.js · TypeScript · Express.js · PostgreSQL · Redis

   Vekzi case study

7. Xinvoice Maker

   A Flutter application for invoices, estimates, bills, and receipts.

   Flutter development & integrations

   • Built document workflows and multilingual PDF generation with Clean Architecture, Riverpod, and Drift persistence.
   • Integrated Google Drive synchronization with conflict resolution and RevenueCat subscriptions while supporting offline use.

   Stack Flutter · Riverpod · Drift · Google Drive API · RevenueCat

   Xinvoice Maker case study

Open-source work

Education