Survision

Overview

Developed the backend using NestJS, TypeORM, PostgreSQL, Redis, and TypeScript, alongside a mobile application with React Native, integrating secure APIs and real-time features. Managed deployment servers with Nginx, configured domain names, ensured server security, and optimized performance.

Key Features

• Survey Creation and Management: Allows admins to create, update, and manage surveys, including setting titles, descriptions, target audiences, and pricing.
• Region-Based Targeting: Enables surveys to be targeted to specific geographic regions (Wilayas) within Algeria.
• Collector Management: Provides tools for managing collectors, including status verification and profile updates.
• Real-time Location Tracking: Uses collector location data to assign relevant surveys based on proximity.
• Create a nominatim library to manage location searching and reverse geocoding.
• Diffrent qusetion types: Supports multiple question types, including multiple-choice with others , free , radio ,etc...
• Survey Assignment and Filtering: Implements logic to assign surveys to collectors based on their location and survey status (active, paused, completed).
• Role-Based Access Control: Implements different roles (admin, collector, company) with associated permissions.
• Data Analytics and Reporting: Includes features for counting surveys, tracking survey status, and calculating response rates.
• Payment and Transaction Management: Supports payment processing and transaction tracking for collectors.
• Reports : Allow user to send reports and manage them.
• Fraud Detection: Implements mechanisms to detect and prevent fraudulent activities and submissions by collectors.
• Authentication and Authorization: Implements secure login and registration processes for different user roles.
• Detailed Statistics: Provides in-depth statistics on surveys, collectors, and responses for better decision-making.
• Email Notifications: Sends email notifications for various events, such as account verification and demo requests.
• Collector Referral System: Implements a referral system for collectors to invite others and earn rewards.
• Company Referral System: Enables companies to refer their collectors to Survision.
• Company Profile Management: Allows companies to manage their profiles, including company size, contact information, and website details.
• API Documentation with Swagger: Uses Swagger to document and expose the API endpoints.

Technical Challenges

• Ensuring accurate location data and survey assignment.
• Maintaining data privacy and security, especially regarding user location and personal information.
• Scaling the platform to handle a large number of surveys, collectors, and responses.
• Optimizing database queries for performance, especially when filtering surveys by Wilaya and status.
• Handling potential conflicts when adding Wilayas to surveys.
• Implementing robust error handling and logging.
• Managing collector verification and status updates.
• Integrating with external services for location data and payment processing.
• Creating a user-friendly interface for survey creation and management.
• Keeping the application up-to-date with the latest security patches and best practices.