Solidarity Savings Tontine

A complete 360° digital transformation for a solidarity savings association — modernizing tontines with enterprise-grade architecture

This project is the full digital transformation of a financial solidarity association whose mission is to help its members save and finance meaningful projects through shared tontines. For years, the association had been managing everything — membership, savings cycles, beneficiary rotations, training content — through spreadsheets, informal group chats, and a patchwork of manual workflows. The goal of this rebuild was to take that entire operation and turn it into a modern, secure, scalable digital ecosystem fit for the association's ambitions.

A 360° digital ecosystem

Three distinct but tightly integrated products were built, each serving a specific audience.

• Dynamic showcase site: a modern public presentation of the association, its values, its impact, and a curated showcase of successfully funded projects. This is the front door — where prospective members learn about the association, read testimonials, and understand how the tontine model works.
• Collaborative member space: a private portal accessible only after authentication, where members consult their personal financial dashboard (contributions paid, upcoming tontine turns, total saved, next beneficiary cycle), browse the community directory, and follow exclusive financial education modules. The portal turns membership from a passive relationship into an active, continuous engagement.
• Command backoffice: an exhaustive administration interface for the association's managers, letting them pilot every flow, manage roles, onboard and offboard members, supervise savings cycles, and generate financial reports without ever touching a database directly.

High-flying cloud architecture

The platform was built with modern web standards to ensure scalability, reliability, and long-term maintainability.

• Next.js 14 (App Router) and React for instant navigation, server-side rendering where it counts, and a clean, modern component model.
• Supabase as the serverless backend infrastructure, handling authentication, storage, and real-time features, on top of a robust PostgreSQL database for relational integrity of financial data.
• Prisma ORM for type-safe data access and structured schema migrations.
• TypeScript end to end for a codebase that stays maintainable as the association's team evolves.
• Sophisticated role-based access control (RBAC) ensuring the watertightness of financial data — members see only their own data, managers see only what their role requires, and privileged operations are logged and auditable.

Why enterprise architecture for a solidarity association

There is a persistent myth that associations and non-profits should "make do" with informal tools because their budgets are smaller. The opposite is true. Associations that handle real money on behalf of their members owe them more rigor, not less — the members are not paying customers who can easily switch providers, they are stakeholders whose savings matter. Bringing enterprise-grade architecture to this association is a way of respecting its members and its mission.

The delivered outcome

• A modern, coherent digital presence that matches the association's ambitions and values.
• A private, secure member space that turns membership into an everyday, tangible experience.
• A powerful backoffice that frees managers from spreadsheet chaos and enables them to focus on community and strategy.
• A scalable architecture ready for new member growth and new product lines (additional savings tracks, new training modules, new member regions).

Technology stack

• Next.js 14 with App Router and React.
• Tailwind CSS for the design system.
• Supabase for authentication, storage, and real-time backend features.
• PostgreSQL for the relational data layer.
• Prisma ORM for type-safe data access.
• TypeScript across the whole codebase.

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