Fintech / cross-border payments / telco top-up · 2024
Cross-border airtime and prepaid electricity top-ups in 5 seconds
Cross-border airtime and prepaid electricity top-ups in 5 seconds
React NativeReactFastAPI
Case studies
Systems that ship.
Case studies across mobile, web, backend, and Integrated services
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Local discovery / hospitality · 2024
Map-first discovery for time-sensitive local offers
Map-first discovery for time-sensitive local offers
FlutterGoogle Maps SDK + Places APIFastAPI + Postgres
Real estate / property listings · 2024
Radius-based property search without a custom GIS backend
Radius-based property search without a custom GIS backend
Flutter 3.13.0Google Places APISupabase
Fintech / retail trading tools · 2024
Trading calculators with live prices wired in
Trading calculators with live prices wired in
Flutter 3.13.0FastAPIWebSocket / Socket stream
Consumer AI / voice assistant · 2024
Speech-in, speech-out - a GPT-4 Turbo assistant in 51 languages
Speech-in, speech-out - a GPT-4 Turbo assistant in 51 languages
OpenAI GPT-4 TurboNative platform ASRGoogle Text-to-Speech
Community / regional development / events · 2023
Bilingual community app - jobs, housing, events, clubs in one place
Bilingual community app - jobs, housing, events, clubs in one place
Flutter 3.7+FastAPI + PostgresIn-app payment gateway
Community / social impact · 2023
Geofenced surplus-food sharing within a 10km radius
Geofenced surplus-food sharing within a 10km radius
Flutter 3.7.1FirebaseGoogle Maps SDK for Flutter
Fintech / physical gold investment (Shariah-compliant) · 2023
Sabika Gold: gold trading across iOS, Android, and web
Sabika Gold: gold trading across iOS, Android, and web
Flutter 3.10.5FastAPISQL Server
Hospitality software / access control · 2023
Keyless hotel access from web, iPad, and mobile
Keyless hotel access from web, iPad, and mobile
Flutter 3.7FastAPISQL Server
Automotive / live auctions · 2023
Live auction bidding without the timer drifting
Live auction bidding without the timer drifting
React NativeReactFastAPI
AI / consumer productivity · 2023
Voice-first GPT-4 assistant from one Flutter codebase
Voice-first GPT-4 assistant from one Flutter codebase
Flutter 3.7OpenAI GPT-4OpenAI image generation API
Wealth management / mutual fund distribution · 2021
One app to track a multi-asset private portfolio
One app to track a multi-asset private portfolio
Flutter 2.xChopper (Dart HTTP client)FastAPI
Faith-based lifestyle / community learning · 2020
Learning app where non-engineers control the content
Learning app where non-engineers control the content
Flutter (initial build Flutter 1.x era; current build Flutter 3.3)Firebase (Auth + Firestore + Storage)Firebase Mobile Auth (OTP)
E-commerce / grocery retail (Saudi Arabia) · 2020
Arabic-first grocery commerce with a rewards loop
Arabic-first grocery commerce with a rewards loop
Flutter 2.7GetXDio
Healthcare / physiotherapy / fitness · 2019
Physiotherapy exercise plans that live in one place
Physiotherapy exercise plans that live in one place
Flutter (initial build on Flutter 1.x era; later upgraded)Firebase (Auth + Firestore + Storage + Functions + Hosting)Algolia
Maritime / defence / specialist reference · 2018
Naval reference + marketplace across 104 countries that works offline
Naval reference + marketplace across 104 countries that works offline
Flutter (initial build on Flutter 1.x, later upgraded to the latest Flutter)GetXFirebase
The team on the call
Sameer Donga
Founder & Lead Engineer
Shipping Flutter, FastAPI, and AI systems since 2019. Reviews the architecture on every engagement.
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