Markanda.nl - Hybrid Marketplace Platform

Ludulicious developed Markanda.nl, a hybrid marketplace platform that enables users to both sell items and give away free items. The platform facilitates connections between buyers and sellers while also supporting the free exchange of items, creating a comprehensive marketplace solution for Dutch users.

Development Challenges and Solutions

Hybrid Marketplace Architecture

• Dual Listing System: Built a platform that seamlessly handles both paid sales listings and free giveaway listings in a unified interface
• Advanced Search Engine: Developed a fast search system using ASP.NET 9 with LINQ queries and ServiceStack, filtering across both free and paid items by categories, keywords, and content
• Price-Based Filtering: Implemented search capabilities that allow users to filter by price ranges, distinguishing between free items and paid listings
• In-Memory Caching: Utilized extensive Redis caching for search results, user sessions, and frequently accessed data

Contact Facilitation System

• Integrated Messaging Platform: Created a built-in messaging system enabling direct communication between buyers and sellers for negotiations
• Real-time Communication: Implemented SignalR for instant messaging and real-time notifications
• Contact Information Management: Developed secure contact sharing functionality for external transaction facilitation
• Transaction Facilitation: Built workflows that guide users through the negotiation process without handling payments directly
• User Dashboard: Designed a comprehensive portal where users can manage both their sales and free listings, track responses, and monitor marketplace activity

Project Results

The platform has successfully facilitated thousands of connections between buyers and sellers, with over 100,000 products listed across both paid sales and free giveaways. The hybrid marketplace architecture developed by Ludulicious has enabled users to seamlessly navigate between free and paid listings while maintaining sub-second search response times.

The platform operates in cooperation with GratisAftehalen.nl, creating a comprehensive ecosystem for Dutch users to both sell and give away items. The contact facilitation system has proven effective in connecting users for external transactions without requiring payment processing integration.

Technologies Used

• Frontend: Razor Pages for main site, Durandal.js with Knockout for user portal
• Backend: ASP.NET Core 9.0, C#, ServiceStack, OrmLite
• Database: PostgreSQL with Redis for extensive in-memory caching
• Real-time Communication: SignalR for instant messaging and notifications
• CDN: Custom highly optimized CDN for image upload and download
• Performance: LINQ queries with ServiceStack for fast data access

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