Dealer Auction App Development - Flutter, .net core 8 & MangoDB
Budget: ₹250,000 – ₹500,000 INR
Car Auction Platform - Technical Requirements Document
1. Project Overview
1.1 Purpose
A comprehensive car auction platform designed specifically for used car dealers in India, enabling seamless vehicle listing, live bidding, and winner connectivity without integrated payment processing.
1.2 Target Platforms
• Android Mobile Application
• iOS Mobile Application
1.3 Core Business Model
• Platform facilitates connections between sellers and buyers
2. User Types & Access Levels
2.1 User Roles
• Sellers (Dealers): List vehicles, manage auctions, view winner details
• Buyers: Browse vehicles, participate in bidding, access winning vehicle details
• Admin: Platform management, user verification, dispute resolution
• Super Admin: System configuration, analytics, user management
3. Core Features
3.1 User Management System
Registration & Authentication
• Through Username & password provided by the administrator
User Profiles
• Dealer Profiles: Business details, location, inventory history, ratings
• Buyer Profiles: Personal information, bidding history, preferences, Wishlist
3.2 Vehicle Listing Management
Listing Creation (Sellers)
• Comprehensive vehicle details form:
• Basic Info: Make, model, year, variant, fuel type, transmission
• Technical Details: Engine specifications, mileage, color, ownership history
• Condition Assessment: Exterior/interior condition, accident history
• Documentation: RC, insurance, pollution certificate status
• Multi-image upload (minimum 15 photos, maximum 60)
• Video upload capability
• Document upload (RC copy, insurance, etc.)
• Auction scheduling (start time, duration, reserve price)
3.3 Advanced Search & Discovery
Search Functionality
• Multi-parameter search filters:
• Location-based search
• Price range filters
• Make/model/year combinations
• Fuel type, transmission, ownership count
• Mileage range, color preferences
• Saved search alerts with email/SMS notifications
• Recently viewed vehicles
• Advanced sorting options (price, date, mileage, etc.)
3.4 Live Auction System
OCB- One click buy option, these are cars which are not a part of auction, but the dealers can put them up like ads, and if the buyer is ok with the price he can book the car and contact the seller
Real-time Bidding Engine
• WebSocket-based real-time bidding
• Countdown timer (10-15 minutes configurable per auction)
• Auto-refresh bid amounts
• Bid increment rules (minimum bid increments)
• Reserve price protection
• Automatic bid extension (if bid placed in last 30 seconds)
Bidding Interface
• Live participant count display
• Current highest bid visibility
• Quick bid buttons (increment shortcuts)
• Maximum bid setting (proxy bidding)
• Mobile-optimized bidding interface
Auction Management
• Pre-auction registration requirement
• Auction scheduling and calendar
• Multiple concurrent auction support
• Auction cancellation policies
• Post-auction winner declaration
3.5 Winner Management System
Winner Declaration
• Automatic winner identification
• Winner notification (SMS, WhatsApp, email, push notification)
• Seller notification with winner details
• Winner verification process
Contact Facilitation
• Secure contact detail sharing (only with winners)
• Built-in messaging system between winner and seller
• Call scheduling features
3.6 Communication System
Messaging Platform
• In-app messaging between users
• File sharing capabilities
• Message history and archiving
Notification System
• Push notifications for mobile apps
• Email notifications
• SMS alerts for critical updates
• Notification preferences management
• Real-time alerts for auction activities
4. Advanced Features
4.1 Analytics & Reporting
User Analytics
• Bidding behaviour analysis
• Search pattern insights
• Conversion tracking
• User engagement metrics
• Seller performance metrics
4.4 Compliance & Security
Security Features
• SSL encryption for all data transmission
• Secure file storage with access controls
• Regular security audits and penetration testing
• GDPR compliance for data handling
• Fraud detection algorithms
5. Technical Specifications
5.1 Platform Architecture
• Cloud-based scalable architecture (AWS/Azure/GCP)
• API-first development approach
• CDN integration for fast image/video loading
5.2 Database Requirements
• Primary database:
• Cache layer: Redis for session management and real-time data
• File storage: Cloud storage (S3/Google Cloud Storage)
• Search engine: Elasticsearch for advanced search capabilities
5.3 Mobile Application Features
• Native Android and iOS applications
• Offline viewing of saved listings
• Push notification support
• Location-based services
• Camera integration for image capture
5.4 Performance Requirements
• Page load time: Under 3 seconds on 4G networks
• Concurrent user support: 1000+ simultaneous users
• Real-time bidding latency: Under 500ms
• 99.9% uptime availability
• Auto-scaling capabilities
6. Integration Requirements
6.1 Third-party Integrations
• SMS gateway integration (multiple providers)
• Location services (Google Maps)
• Image compression and optimization services
7. Admin Panel Features
7.1 User Management
• User verification and approval workflows
• User suspension and ban capabilities
• Bulk user operations
• User analytics and reporting
7.2 Content Management
• Listing approval workflows
• Content moderation tools
• Bulk listing operations
• Featured listing management
7.3 System Configuration
• Auction parameters configuration
• Notification template management
• System maintenance mode controls
7.4 Application should be built as per below technology stacks only.
• Front End – Flutter
• Backend - .net core 8
• Database - MangoDB
1. Project Overview
1.1 Purpose
A comprehensive car auction platform designed specifically for used car dealers in India, enabling seamless vehicle listing, live bidding, and winner connectivity without integrated payment processing.
1.2 Target Platforms
• Android Mobile Application
• iOS Mobile Application
1.3 Core Business Model
• Platform facilitates connections between sellers and buyers
2. User Types & Access Levels
2.1 User Roles
• Sellers (Dealers): List vehicles, manage auctions, view winner details
• Buyers: Browse vehicles, participate in bidding, access winning vehicle details
• Admin: Platform management, user verification, dispute resolution
• Super Admin: System configuration, analytics, user management
3. Core Features
3.1 User Management System
Registration & Authentication
• Through Username & password provided by the administrator
User Profiles
• Dealer Profiles: Business details, location, inventory history, ratings
• Buyer Profiles: Personal information, bidding history, preferences, Wishlist
3.2 Vehicle Listing Management
Listing Creation (Sellers)
• Comprehensive vehicle details form:
• Basic Info: Make, model, year, variant, fuel type, transmission
• Technical Details: Engine specifications, mileage, color, ownership history
• Condition Assessment: Exterior/interior condition, accident history
• Documentation: RC, insurance, pollution certificate status
• Multi-image upload (minimum 15 photos, maximum 60)
• Video upload capability
• Document upload (RC copy, insurance, etc.)
• Auction scheduling (start time, duration, reserve price)
3.3 Advanced Search & Discovery
Search Functionality
• Multi-parameter search filters:
• Location-based search
• Price range filters
• Make/model/year combinations
• Fuel type, transmission, ownership count
• Mileage range, color preferences
• Saved search alerts with email/SMS notifications
• Recently viewed vehicles
• Advanced sorting options (price, date, mileage, etc.)
3.4 Live Auction System
OCB- One click buy option, these are cars which are not a part of auction, but the dealers can put them up like ads, and if the buyer is ok with the price he can book the car and contact the seller
Real-time Bidding Engine
• WebSocket-based real-time bidding
• Countdown timer (10-15 minutes configurable per auction)
• Auto-refresh bid amounts
• Bid increment rules (minimum bid increments)
• Reserve price protection
• Automatic bid extension (if bid placed in last 30 seconds)
Bidding Interface
• Live participant count display
• Current highest bid visibility
• Quick bid buttons (increment shortcuts)
• Maximum bid setting (proxy bidding)
• Mobile-optimized bidding interface
Auction Management
• Pre-auction registration requirement
• Auction scheduling and calendar
• Multiple concurrent auction support
• Auction cancellation policies
• Post-auction winner declaration
3.5 Winner Management System
Winner Declaration
• Automatic winner identification
• Winner notification (SMS, WhatsApp, email, push notification)
• Seller notification with winner details
• Winner verification process
Contact Facilitation
• Secure contact detail sharing (only with winners)
• Built-in messaging system between winner and seller
• Call scheduling features
3.6 Communication System
Messaging Platform
• In-app messaging between users
• File sharing capabilities
• Message history and archiving
Notification System
• Push notifications for mobile apps
• Email notifications
• SMS alerts for critical updates
• Notification preferences management
• Real-time alerts for auction activities
4. Advanced Features
4.1 Analytics & Reporting
User Analytics
• Bidding behaviour analysis
• Search pattern insights
• Conversion tracking
• User engagement metrics
• Seller performance metrics
4.4 Compliance & Security
Security Features
• SSL encryption for all data transmission
• Secure file storage with access controls
• Regular security audits and penetration testing
• GDPR compliance for data handling
• Fraud detection algorithms
5. Technical Specifications
5.1 Platform Architecture
• Cloud-based scalable architecture (AWS/Azure/GCP)
• API-first development approach
• CDN integration for fast image/video loading
5.2 Database Requirements
• Primary database:
• Cache layer: Redis for session management and real-time data
• File storage: Cloud storage (S3/Google Cloud Storage)
• Search engine: Elasticsearch for advanced search capabilities
5.3 Mobile Application Features
• Native Android and iOS applications
• Offline viewing of saved listings
• Push notification support
• Location-based services
• Camera integration for image capture
5.4 Performance Requirements
• Page load time: Under 3 seconds on 4G networks
• Concurrent user support: 1000+ simultaneous users
• Real-time bidding latency: Under 500ms
• 99.9% uptime availability
• Auto-scaling capabilities
6. Integration Requirements
6.1 Third-party Integrations
• SMS gateway integration (multiple providers)
• Location services (Google Maps)
• Image compression and optimization services
7. Admin Panel Features
7.1 User Management
• User verification and approval workflows
• User suspension and ban capabilities
• Bulk user operations
• User analytics and reporting
7.2 Content Management
• Listing approval workflows
• Content moderation tools
• Bulk listing operations
• Featured listing management
7.3 System Configuration
• Auction parameters configuration
• Notification template management
• System maintenance mode controls
7.4 Application should be built as per below technology stacks only.
• Front End – Flutter
• Backend - .net core 8
• Database - MangoDB