Used Car Auction 'Selca' Completes Core System Upgrade Amidst Rapid Business Growth

Quick Network Inc. (Headquarters: Kobe City, Representative Director: Shori Tabata), which promotes digital transformation in used car distribution and operates the CtoB car auction site 'Selca' (a name meaning 'winning bid assessment'), announces the completion of the largest-scale core system replacement since the service's inception.

This upgrade improves the processing capacity for a large volume of vehicles and introduces mechanisms for unique user identification, UI renewal, and smoother bidding, providing a more seamless and personalized sales experience than ever before.

## Background of the System Upgrade: Building an 'Offensive Foundation'
Selca achieved a Gross Merchandise Value (GMV) exceeding approximately 23.9 billion yen in fiscal 2025, a growth of about 5.5 times over the past four years. With the rapid increase in transaction volume, the previous system faced issues including increased load when processing multiple vehicles simultaneously and slower development speed due to complex internal structures.

To ensure future scalability, the company carried out a full-scale replacement of the core system to balance 'system stability' and 'improved user convenience.'

## Key Topics of the System Replacement (1)
### 1. Strengthening Scalability of the Auction Infrastructure
The new system adopts a structure capable of processing large volumes of vehicles simultaneously, significantly enhancing performance during peak times and building a growth foundation that can flexibly scale capacity as transaction volumes increase.

### 2. Overhauling the Data Infrastructure from 'Vehicle-Centric' to 'User-Centric'
The old system had an information structure centered on vehicles, making it structurally difficult to capture a single user's transaction history or behavior across the board.
The new system introduces a foundation for uniquely identifying users, integrating transaction and behavioral data at the user level. This establishes a foundation for service evolution utilizing data, in addition to improving the experience for each individual user.

Improved experience for multiple listings and repeat use: In the new system, users can manage listing status for multiple vehicles in one account, allowing repeat users to proceed with sales procedures using the same account.

Improved accuracy of customer identification: By issuing a unique identifier for each customer, the company has eliminated identification gaps caused by changes in email addresses, enabling consistent guidance based on past history at appropriate times.

### 3. Accelerating 'Improvement Speed' by Resolving System Complexity
In this upgrade, the code base was reorganized to redesign the system structure to be more change-friendly and robust. As a result, the man-hours required for implementing new functions and UI improvements have been significantly reduced, realizing a development structure that can respond to customer requests and market changes faster than ever before.

### 4. Evolution of User-Facing Screens (UI/UX Renewal)
The UI of My Page and auction screens has been completely renewed. A system has been introduced where required procedures can be checked collectively as a 'To-Do List,' preventing oversight even when selling multiple vehicles in parallel.

## Key Topics of the System Replacement (2)
### 1. Maximizing Bidding Efficiency via Multi-Lane Introduction
Previously, vehicles ended one by one, but the new system introduces a 'multi-lane' system where multiple vehicles end in parallel. Starting with two lanes, the company plans to expand further as needed. This allows for bidding on more vehicles within a limited time, maximizing closing opportunities.

### 2. Evolution of Buyer-Facing Screens (UI/UX for Simultaneous Ending)
In line with the new multi-lane method, the bidding screen UI has been fully renewed. While maintaining the list format sorted by end time, the screen highlights multiple vehicles ending soon, enhancing the convenience of the bidding environment.