Alexander Amoah

1. Aug 2024 - Present

   Senior Mobile Engineer · Phundit

   Accra, Ghana

   • Built the mobile product from scratch and helped scale it to 5K+ active users, shipping investment features, a serverless Node.js backend, and mobile money (MTN MoMo) payments.
   • Engineered auto-deposit system with OTP, recurring schedules, idempotent webhooks, and backend job schedulers for payment retries and notifications.
   • Developed watch-and-earn system and peers comparison feature that drove a 30%+ increase in user engagement and deposit frequency.
   • Integrated brokerage APIs for deposits, withdrawals, and portfolio tracking; built KYC pipeline with Ghana Card verification.

   Phundit:PlayiOS

   • Flutter
   • Dart
   • Node.js
   • TypeScript
   • Firebase
   • BLoC
2. Nov 2025 - Feb 2026

   Lead Mobile Engineer (Contract) · Bubbles

   New York, USA (Remote)

   • Designed and shipped two Flutter apps in 3 months: customer mobile app and merchant tablet app for on-demand laundry.
   • Led architecture with clean architecture, DI, and repository pattern; integrated Google Maps for real-time tracking.
   • Added push notifications with timezone-aware scheduling and multi-language support (EN/FR) with HydratedBloc persistence.

   • Flutter
   • Dart
   • Google Maps
   • Firebase
   • BLoC
   • REST APIs
3. Sep 2024 - Nov 2025

   Mobile Engineer (Concurrent) · Accede

   Accra, Ghana

   • Contributed to a large-scale logistics app alongside a senior engineer, building consignment management, shipment tracking, and quotation workflows.
   • Implemented Stripe payment integration, subscription management, and Twilio-based messaging with real-time chat.
   • Transformed Figma mockups into responsive Flutter UIs with multi-flavor builds (dev, staging, production).
   • Wrote comprehensive unit and widget tests maintaining high code coverage across the codebase.

   • Flutter
   • Dart
   • Stripe
   • Twilio
   • Firebase
   • Google Maps
4. Mar 2023 - Jul 2023

   Mobile Engineer · Sibyl Systems

   Akosombo, Ghana

   • Engineered VCSA client app for Volta River Authority (1K+ downloads, 5.0 Play Store rating) with service requests, complaint filing, and incident tracking.
   • Built live chat, real-time status tracking, and push notifications for updates and emergency broadcasts.
   • Led development of ACSA admin app for VRA staff; designed UI from Figma and created reusable widgets shared across three applications.

   VCSA:PlayiOS

   ACSA:Play

1. Phundit | Fintech Investment Platform

   Production fintech app for investing, portfolio tracking, and mobile money payments.

   • ▹1.3K+ active users
   • ▹Auto-deposit & recurring payments
   • ▹KYC verification pipeline
   • ▹Brokerage API integration
   • ▹Reward redemption system

   • Flutter
   • Dart
   • TypeScript
   • Firebase
   • BLoC
   • Sentry
2. Trader POS | Retail Point-of-Sale System

   Full-stack POS system for small and medium retailers — Flutter mobile app, Node.js REST API, Next.js admin dashboard, and marketing website. Solo project built end-to-end.

   • ▹Multi-role team management (Owner, Manager, Cashier) with JWT auth and OTP verification
   • ▹Offline-first with Drift (SQLite) and background sync to PostgreSQL backend
   • ▹Barcode scanning via camera to add products to cart or register new products
   • ▹Thermal printer integration with configurable receipt width and printer settings
   • ▹Customer debt ledger with partial payment and credit tracking
   • ▹Stock movement history with sales, purchases, adjustments, and returns
   • ▹Mobile money (MoMo) and multi-method payment support with change due calculation
   • ▹Multi-flavor builds (dev, staging, production) with Docker deployment
   • ▹Export to CSV for store records and reporting
   • ▹Today's sales and profit summary on the dashboard
   • ▹Product performance summary across catalog
   • ▹Light/dark theme switcher in Settings

   Play StoreApp Store

   • Flutter
   • Node.js
   • TypeScript
   • PostgreSQL
   • Firebase
   • Drift
3. Bubbles | Laundry Delivery Platform

   Two-app Flutter system: customer app and merchant tablet app for on-demand laundry.

   • ▹Clean architecture with DI
   • ▹Real-time tracking with Google Maps
   • ▹Multi-language support (EN/FR)
   • ▹Push notifications with timezone scheduling
   • ▹HydratedBloc state persistence

   • Flutter
   • Dart
   • Google Maps
   • Firebase
   • BLoC
   • DIO
4. Accede | Logistics & Shipping App

   Flutter app for managing customers, shipments, and notifications in logistics.

   • ▹Responsive UI from design mockups
   • ▹API contract definition & consumption
   • ▹RESTful design best practices

   • Flutter
   • Dart
   • REST APIs
   • Swagger
5. Sibyl Systems | Multi-Platform Suite

   Three Flutter apps: customer app, admin app, and desktop dashboard.

   • ▹3 apps: mobile customer, mobile admin, desktop dashboard
   • ▹DCSA business logic implementation
   • ▹Reusable widget library
   • ▹Cross-platform responsive layouts

   • Flutter
   • Dart
   • Figma
6. Boola | Trash Pickup & Waste Management

   Cross-platform app for on-demand trash pickup and waste management. Solo project.

   • ▹Sole developer, full ownership
   • ▹Ride ordering & payment flows
   • ▹Push notifications integration
   • ▹Full backend with Firebase
   • ▹End-to-end architecture & deployment

   • Flutter
   • Dart
   • Typescript
   • Firebase
   • BLoC
   • RxDart

1. Oct 28, 2026·5 min read

   Building Trader POS: A Full-Stack Retail System from Scratch

   How I designed and shipped a complete point-of-sale ecosystem: Flutter mobile app, Node.js API, Next.js dashboard, and marketing site, as a solo engineer.

   • Flutter
   • Node.js
   • PostgreSQL
   • Architecture
2. Oct 20, 2026·6 min read

   Why I Built Trader POS: The Retailers Nobody Was Building For

   The story behind Trader POS: what I saw in Ghana's small retail shops, and why I put everything else aside to build something from scratch.

   • Product
   • Ghana
   • Entrepreneurship
   • Flutter

I'm always open to discussing new projects, creative ideas, or opportunities to be part of your team. Feel free to reach out.

+233558060860 · Kumasi, Ghana