Amoah Alexander
Kumasi
Summary
Lead Mobile & Full-Stack Engineer with expertise in developing high-performance applications and backend solutions using Flutter and Dart. Strong background in integrating advanced features such as KYC verification and payment systems, effectively enhancing user experiences across multiple platforms.
Overview
3
3
years of professional experience
Work History
Senior Mobile Engineer
Phundit
Accra
08.2024 - Current
- Scaled mobile app to 1.3K+ active users by developing core product features and backend infrastructure.
- Built auto-deposit system with scheduling, OTP verification, lifecycle monitoring, and mobile money wallet integration.
- Implemented Recurring Payment Plan (RPP) webhook infrastructure with idempotent processing and status management.
- Integrated brokerage APIs for deposits, withdrawals, portfolio balance tracking, and investment management.
- Developed reward redemption system enabling users to access airtime, data bundles, ECG/GWC payments, and TV subscriptions.
- Built KYC verification pipeline including Ghana Card verification, document uploads, and status monitoring.
- Full-stack development across the mobile application and serverless backend powering a production fintech platform integrated with brokerage and payment provider APIs.
- Tech Stack: Flutter, Dart, TypeScript, Firebase Cloud Functions, Firestore, Firebase Auth, Firebase Storage, Firebase Messaging, BLoC/HydratedBloc, Freezed, RxDart, fpdart, Sentry, BigQuery, Vitest.
Lead Mobile Engineer
Bubbles
New York
11.2025 - 02.2026
- Developed an entire customer app with clean architecture, repository pattern, and DI for authentication, orders, location, notifications, and profiles.
- Developed customer mobile app and contributed to merchant tablet app for seamless two-app Flutter system.
- Integrated Google Maps for real-time tracking, enhancing merchant search and address autocomplete functionalities.
- Implemented push notifications with timezone-aware scheduling, improving user engagement through effective runtime permission handling.
- Added multi-language support (English/French) and optimized performance with caching, pagination, and HydratedBloc state persistence.
- Tech Stack: Flutter, Dart, BLoC/HydratedBloc, RxDart, DIO, FPDart, Google Maps, Firebase Cloud Messaging, REST APIs.
Junior Mobile Engineer
Accede
Accra
09.2024 - 11.2025
- Executed Flutter mobile UI implementation, transforming design mockups into responsive, user-friendly interfaces.
- Collaborated with senior engineers to enhance API modules for Customers, Shipments, and Notifications, improving data flow and user experience.
- Defined and consumed API contracts between backend services and Flutter clients, ensuring reliable communication and integration.
- Acquired practical experience in a Swagger-documented API environment, focusing on RESTful design best practices.
Frontend Mobile Engineer
Sibyl Systems
Akosombo
03.2023 - 07.2023
- Contributed to development of three Flutter applications (customer mobile app, admin mobile app, desktop admin dashboard) to streamline internal operations and enhance user management.
- Built UI screens for all three applications from Figma designs, ensuring responsive layouts across mobile and desktop form factors.
- Implemented parts of the DCSA business logic and integrated frontend flows with backend services.
- Created reusable Flutter widgets and ensured consistent UI components across product suite to improve user experience.
Education
Bachelor of Science - Information and Communication Technology
Akenten Appiah-Menka University Of Skills Training And Entrepreneurial Development
Kumasi,Ghana01-2024
High school or equivalent -
Acherensua Senior High School
Acherensua,Ghana01-2017
Skills
- Flutter
- Dart
- Kotlin
- JavaScript
- TypeScript
- Nextjs
- Express
- MongoDB
- MySQL
- PostgreSQL
- GitHub
- JIRA
References
- Benedict AmpofoAdu, Co-founder of Sibyl Systems & Phundit, adubenedict10@gmail.com
- Boris Thiam, Founder Of Bubbles Software Technologies, boristhiam@gmail.com
- Felix Asamoah, Senior Cross-Platform Engineer
Timeline
Lead Mobile Engineer
Bubbles
11.2025 - 02.2026
Junior Mobile Engineer
Accede
09.2024 - 11.2025
Senior Mobile Engineer
Phundit
08.2024 - Current
Frontend Mobile Engineer
Sibyl Systems
03.2023 - 07.2023
Bachelor of Science - Information and Communication Technology
Akenten Appiah-Menka University Of Skills Training And Entrepreneurial Development
High school or equivalent -
Acherensua Senior High School