Contact person: PAX S300 Tip Prompt Integration

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Location: warrington, United States

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I already have a .NET point-of-sale application talking to a PAX S300 (often shown on screen as the A35 / S300 family). What I’m missing is the flow that lets the customer:

• Pick a predefined tip (for instance 10 %, 15 %, 20 %) or enter any custom amount.
• Key in a phone number after the tip screen—no extra validation, I just need the raw digits returned.

Both prompts must appear on the PAX device before the final amount is sent for authorization, and the selected tip and the phone number have to come back to my .NET code so I can store them with the transaction.

You can extend or refactor my existing POSLink / PAXStore integration; I’ll share the current solution and test credentials as soon as we start. Deliverables are the updated C# code (or a small class library), any XML/JSON payload examples required by the terminal, and a quick read-me so I can reproduce the build and push it into production.

Only apply if you have experience." (client-provided description)