Development of Web-Based POS App with Card Transaction Support

I am seeking a skilled freelancer to develop a secure, web-based Point-of-Sale (POS) solution that supports card transactions using approval codes issued by banks or payment processors. Key project details:

- Supports major card types like Visa and Mastercard.
- Processes transactions utilizing pre-issued approval (authorization) codes.
- Integrates and supports Protocol 101.1 for transaction handling.
- Freelancer to recommend and integrate a suitable payment gateway supporting this functionality.
- Fully web-based, optimized for both desktop and mobile use.