Ecommerce Integration

Interfacing with CardConnect credit card terminals

The pain point here was a client with Point Of Sales systems not able to integrate with CardConnect terminals.

Details:

• Built a socket-based C# application to communicate with the Point of Sale (POS) system and the CardConnect API.
• The application was built with C# using .NET Core
• The POS system would transmit a request over the socket to take a credit card which would trigger the CardConnect interface
• The CardConnect device interfaced with REST API calls, using multiple servers - each server supporting different credit functions
• Created a socket protocol whose payload contained the combination of a message header and a JSON representation of the CardConnect transaction
• Developed an object class structure for communicating using REST APIs, abstracting the detailed differences between multiple servers
• Provided a JSON-based, multi-terminal configuration system, to allow the user of the application to run multiple terminals
• Used terminal API to capture customer signature images
• Built a PowerShell script that compiles, builds, and packages the application into a single ZIP file
• Provided detailed documentation for setup and use of the application, along with a GUI-based sample application
• Provided client support, with additional improvements and issue resolution