Tontyn

Community savings circles (tontines) are often run on paper or messaging threads, with no shared record of who contributed, whose turn it is or who is late.

A three-tier platform (React web app, Flutter mobile app, Spring Boot API, PostgreSQL) covering the tontine lifecycle: groups and members, contribution cycles and beneficiaries, recorded payments with automatic receipts, scheduled reminders, a payment-reliability score per member, and an assistant that answers member questions.

Final-year project of my Licence at ISI, covering the Spring Boot API, the React web interface and the Flutter mobile application.

• REST API covering authentication, tontines, members, cycles, contributions, payments, receipts and notifications
• PIN login with a one-time-code second factor, JWT sessions, hashed credentials and per-tontine roles (manager, member)
• Progressive identity-verification levels
• Daily scheduled job that follows up on late contributions
• Payment-reliability score per member and automatic receipts
• AI assistant (DeepSeek API) that answers member questions, with a degraded mode when the provider is unavailable

• Three-tier separation, with a single API shared by the web and mobile clients.
• Spring method security with group-level authorization checks in the service layer.
• Docker image for the API and Docker Compose for the local PostgreSQL database.

• JUnit tests cover the AI assistant module (service logic, context building and an integration test).

• Automated tests currently cover the AI assistant module only; the rest of the API, the web app and the mobile app are not covered.
• Payments are recorded per method (Orange Money, Wave); no payment-provider API is integrated.

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