Johann Bacha

For this client, I designed and developed a complete mobile application for learning Arabic, inspired by the MosaLingua model, targeting French-speaking learners.

The project covers the entire stack: a Django/DRF backend API and a cross-platform Flutter mobile application (iOS & Android), connected in real-time.

What I delivered:

Django backend:

a secure REST API with JWT, an educational content engine structured into decks, subcategories, and cards (flashcards), with pronunciation audio file management, progress tracking per user (statuses: new / in progress / to review / needs revision), multi-language management with RTL support (Arabic), and static pages (FAQ, ToS, contact, legal notices).

Flutter app:

login screen with JWT authentication, list of available languages, navigation by decks and categories, flashcard review system with integrated audio (just_audio), persistent progress tracking (shared_preferences, flutter_secure_storage), light/dark theme, and native RTL support for Arabic display.

Stack used:

Django · Django REST Framework · JWT (SimpleJWT) · SQLite/PostgreSQL · Flutter · Dart · just_audio · flutter_secure_storage · FastAPI (audio microservice)

Result:

The client has a complete, self-sufficient, and scalable mobile learning application, with a Django back-office to manage educational content without technical intervention.

Flutter Dart Django Django REST Framework JWT REST API Mobile application iOS Android Python Language learning

For this client, I designed and developed Chuchote from scratch, a multi-tenant B2B SaaS platform allowing companies to create, manage, and pilot their customer referral programs with an integrated rewards system.

The need was clear: to offer companies a turnkey tool to turn satisfied customers into active ambassadors, while maintaining full control over their campaigns and rewards.

What I delivered:

A multi-tenant Django application with fine-grained role management (superadmin, company admin, operator), a complete referral engine (referral links, referred user tracking, history), a rewards and gifts system with codes and expiration dates, a dedicated company dashboard, as well as all mandatory legal pages (ToS, legal notices, privacy policy, contact).

The multi-tenant architecture allows each client company to operate in its own isolated space, with its own users and campaigns.

Stack used:

Django · PostgreSQL · Bootstrap 5 · custom permission management · multi-tenant architecture · international phone validation (E.164, France + DROM)

Result:

The client has a complete, secure, and scalable SaaS platform, ready to be marketed under white label to their own business clients.

Django Python SaaS Multi-tenant PostgreSQL Bootstrap Backend architecture Referral system Permission management Web development

For this client, I designed and developed from scratch a business web application to centralize and manage their entire commercial activity.

Before this project, the client managed their operations across several Excel files and disparate tools. The goal was clear: a single, fast, and maintainable platform, accessible from any browser.

What I delivered:

A multi-module Django application covering customer, supplier, order, product & brand catalog, shipping (ASN), payment methods, locations, and operational agenda management. The interface, built with HTMX and Tailwind CSS, offers a fluid and responsive experience without JavaScript complexity.

Stack used:

Django · PostgreSQL · HTMX · Tailwind CSS · DaisyUI · Vite.js · Docker

Result:

The client has a custom, structured, and scalable tool that effectively replaces a fragmented workflow and saves them considerable time daily.