Technical Documentation

Fravvo Family Technical Architecture

A comprehensive multi-platform family coordination system built with Flutter, Node.js, and modern cloud infrastructure—designed for scalability, real-time communication, and multi-generational accessibility.

Flutter

Platform

Node.js

Backend

PostgreSQL

Database

WebSocket

Real-time

How It Works

Understanding the data flow from user action to database persistence and real-time synchronization across all family members.

User Action

Family member initiates action in mobile app (create event, assign task, send message, or request help)

Authentication

JWT token validated and user permissions checked based on role (Guardian, Child, or Elder)

Business Logic

Server processes request, validates data, and checks for conflicts (calendar overlaps, task dependencies)

Database Write

Data persisted to PostgreSQL with proper foreign key relationships and transaction safety

Real-time Sync

WebSocket broadcasts update to all connected family members instantly across all devices

Push Notifications

Firebase Cloud Messaging sends mobile notifications to offline devices ensuring no missed updates

Core Modules

Technical breakdown of the six primary system modules and their implementation details.

Home Dashboard

Aggregated view of today's events, tasks, and messages with AI-powered suggestions for the family.

Events, Tasks, Messages tables

Today's date + permission filtering

OpenAI-powered suggestions

WebSocket live refresh

Family Calendar

Shared scheduling with automatic conflict detection and smart reminder timing.

Month / Week / Day views

Time overlap conflict detection

Cron-based reminder triggers

Role-based creation permissions

Tasks & Chores

Complete assignment and approval workflow with photo proof and reward system.

State workflow system

S3 photo upload storage

Points calculation logic

Automated reminders

Family Chat

Real-time messaging with WebSocket protocol, offline queue, and media sharing.

Socket.io real-time protocol

Image storage via S3

Offline queue support

Paginated history retrieval

Emergency Help

Instant emergency system with alerts, GPS tracking, and guardian notifications.

Help request DB records

FCM urgent notifications

GPS location tracking

State resolution workflow

AI Assistant

OpenAI-powered scheduling optimization and intelligent automation.

Calendar context analysis

Natural language parsing

Event creation automation

Privacy-safe metadata usage

Design Principles

Built on solid foundations

The architectural decisions that make LathranSuite reliable and scalable

Mobile-First Architecture

Built with Flutter for true native performance on iOS and Android. Single codebase ensures feature parity, rapid iteration, and consistent user experience. Offline-first design powered by local SQLite storage.

Real-Time by Default

Persistent WebSocket connections ensure instant synchronization between family members. Event-driven architecture delivers updates immediately across all devices without manual refresh.

Privacy & Security

End-to-end encryption protects sensitive data. JWT authentication with role-based permissions ensures secure access control. Fully compliant with modern privacy standards.

Accessible for Everyone

Designed for all age groups with large touch targets, high contrast text, and voice support. Simplified UX ensures usability for children, teens, and elderly family members.

Scalable Infrastructure

Containerized backend services enable horizontal scaling. PostgreSQL with read replicas, Redis caching, and CDN delivery ensure performance as usage grows.

Offline Resilience

Core functionality remains operational without internet. Local database syncs automatically when connectivity returns, ensuring no data loss or workflow interruption.