We are looking for an experienced OpenCart developer to create a fully functional payment extension that replicates the same features and flow as the following WooCommerce example: https://github.com/paygate-to/WooCommerce-Instant-Payment-Gateway/blob/main/includes/class-paygatedotto-instant-payment-gateway-hostedpaygatedotto.php The new OpenCart extension should integrate with the PayGate.to API (multi-provider mode) as described in the API documentation below: https://documenter.getpostman.com/view/14826208/2sA3Bj9aBi The final package should be cross-compatible and ready to install on both OpenCart 3.x and 4.x versions. Deliverables: - Fully functional OpenCart payment extension (.zip / OCMOD package). - Documentation (setup, configuration, and developer notes). - Source code with proper comments. - Testing on sandbox and confirmation of successful transactions. Skills Required: - Strong experience in OpenCart module and payment gateway development. - Proficient in PHP, MVC, OCMOD, and API integration. - Familiar with OpenCart 3.x and 4.x structures. - Understanding of webhooks, secure API handling, and payment workflows. Note: We prefer a developer who can ensure long-term support and maintenance for future updates and current budget is $50-100 Max. Thank you.