Why Choose This Project?
Managing contacts across multiple devices often leads to duplication, outdated entries, or data loss. A cloud-based contact book service ensures contacts are securely stored, backed up, and synchronized across devices in real time.
This project helps students learn cloud storage, synchronization, authentication, encryption, and scalable backend design—all of which are widely used in modern SaaS applications.
What You Get
-
A secure cloud contact management system
-
Sync contacts across web, mobile, and desktop apps
-
Search, filter, and categorize contacts easily
-
Data backup & recovery
-
End-to-end encryption for user privacy
-
Integration with email/SMS apps
-
Role-based access for shared contact lists
Key Features
| Feature |
Description |
| User Authentication |
Login with email, Google, or social accounts |
| Contact CRUD Operations |
Add, edit, delete, and merge duplicate contacts |
| Real-Time Sync |
Auto-sync across devices via WebSockets/Firebase |
| Import & Export |
Import contacts from phone/email; Export in CSV/VCF format |
| Search & Filters |
Advanced search by name, email, organization, tags |
| Categories & Tags |
Organize contacts into groups (family, work, clients, etc.) |
| Data Encryption |
End-to-end encryption for secure contact storage |
| Backup & Restore |
Automated cloud backup with versioning |
| Shared Contact Lists |
Collaborate by sharing contact groups with team members |
| Notifications |
Alerts for birthdays, anniversaries, or scheduled reminders |
Technology Stack
| Layer |
Tools/Technologies |
| Frontend |
React / Angular / Vue.js, Bootstrap/Tailwind CSS |
| Mobile Support |
Flutter / React Native for cross-device apps |
| Backend |
Node.js / Spring Boot / Django REST APIs |
| Database |
Firebase Firestore / MongoDB Atlas / PostgreSQL |
| Real-Time Sync |
Firebase Realtime DB / WebSockets (Socket.IO) |
| Cloud Storage |
AWS DynamoDB / GCP Firestore / Azure Cosmos DB |
| Authentication |
Firebase Auth / AWS Cognito / OAuth2 |
| Encryption |
AES-256 encryption for contact data, TLS for transfer |
| Deployment |
Docker + Kubernetes on AWS/GCP/Azure |
Cloud Services Used
| Service |
Purpose |
| Firebase Firestore / DynamoDB |
Scalable NoSQL DB for storing contacts |
| AWS Cognito / Firebase Auth |
Secure authentication & user management |
| Google Cloud Storage / AWS S3 |
Store contact images/avatars |
| AWS SNS / Firebase Cloud Messaging |
Notifications for birthdays/alerts |
| Key Management Service (AWS KMS / GCP KMS) |
Encryption key handling |
| Kubernetes / App Engine |
Hosting scalable backend |
Working Flow
-
User Authentication
User logs in via email/social login. Credentials verified through Cognito/Firebase Auth.
-
Contact Management
User adds/edits/deletes contacts with details like name, email, phone, tags, and avatar.
-
Cloud Sync
All updates are pushed to the backend (Firestore/DB) and synced across all devices in real time.
-
Data Encryption
Contact data is encrypted before storage and decrypted only on the client-side.
-
Backup & Restore
Automatic cloud backup ensures data recovery even if a device is lost.
-
Collaboration
Shared contact groups let multiple users manage the same contact list.
-
Import & Export
Users can import from phone/email or export contacts to CSV/VCF for portability.
-
Notifications
Sends reminders for birthdays, anniversaries, or scheduled calls.
Customization
Fully
Security
High
Performance
Fast
Future Updates
Free
Total Buyers
500+
Support
Lifetime
