Auction Management
System
A comprehensive bidding platform built with Next.js and ASP.NET Core services, securing real-time bid synchronization, lifecycle status updates, and a responsive administration pipeline.
System Screenshots
User Bidding Interface
Admin Management Portal
Bidding Dashboard
Transaction Checkout
Project Overview
The Auction Management System connects eager buyers and sellers with an automated, live-bidding experience. Users can inspect detailed items, place real-time bids, track active countdowns, and verify successful acquisitions via automated status notifications.
The Problem Statement
Traditional auction sites fail when bids are delayed by HTTP polling lag, leading to lost transactions. Preventing concurrent race conditions—where two buyers submit bids at the same millisecond—demands heavy transactional boundaries that normally choke server throughput.
The Solution Engineered
A server using ASP.NET Core SignalR establishes WebSocket pipelines that broadcast incoming bids immediately. Entity Framework isolation levels and T-SQL database locking mechanisms ensure every bid is registered chronologically, maintaining absolute consistency under massive traffic.
System Architecture & Orchestration
Click a Layer to Trace Data Flow
Details Panel
Highly performant web dashboard utilizing Server Components for listing retrieval and dynamic Client Components for real-time bids.
Key Features Demonstrated
- Optimized static listings with dynamic hydrations
- Seamless integration with live WebSockets
- Responsive administrator & bidder interfaces
- Tailwind-designed charts representing item interest analytics
Live Bidding Simulator
Simulate high-throughput bidding transactions. Bid validation occurs on the server, enforcing higher values and updating WebSocket subscribers.
Vanguard Drone Model 3 (Autonomous)
Live Bidding Feed (SignalR Broadcasts)
Engineering Solutions
Race Conditions & Bid Sequencing
Problem: When hundreds of bidders try to lock high bids on closing seconds, network delays can list bids out of sequence or record multiple winners.
Solution: Implemented SQL Server transaction blocks with serializable isolation levels. The backend runs stored procedures validating that an incoming bid exceeds the record before accepting the insert. Bids are committed dynamically, preventing double-allocations.
Bid Lifecycle Automation
Problem: Transitions of status (Active, Ended, Completed) were initially handled by server triggers, clogging database threads.
Solution: Built a hosted background service (Worker Service) in ASP.NET Core that polls active auctions every second, resolves expired listings, calls invoice generating services, and sends push events to clients via SignalR automatically.