Wordpress Plugin Development for Payment Processing

Hello, I am looking for experienced developer to design and construct a bespoke payment processing plugin for my web-based application. Currently embarking on a new venture, I aim to digitize and streamline our cclient invoice handling. At present, we manually track payments received via email transfer, a process that lacks efficiency and oversight.

The envisioned solution would automate payment registration directly within our customized content management system. Key requirements include capturing customer remittance details, associating funds with open invoices, updating balances and status in real-time. Built with extensibility and scalability in mind, the plugin must integrate seamlessly into our PHP-based platform.

I'll bring considerable insight into recurring billing cycles and payment workflows from previous related projects. I can provide thorough specifications depicting all required data fields, payment routes, and interface specifications. The selected developer will enjoy full creative control to architect innovative payment solutions tailored precisely to our distinctive operational needs.

Experience designing payment gateways or similar e-commerce addons is preferred. Strong object-oriented programming skills in PHP are essential. Open lines of communication and detailed documentation will feature prominently throughout the build. Once delivered, ongoing support and refinement may be required.

PS: Please add "WP Plugin" in front of your proposal to confirm that you have already gone through the project's description carefully.