As a seasoned full-stack developer with more than a decade of experience, I have an extensive skill set that directly aligns with your project requirements. I'm proficient in designing and troubleshooting mobile interfaces for a seamless user experience, as well as being well versed in e-commerce and familiar with online payment systems like PayPal and Stripe. My wide-ranging technical skills also include ReactJs, Nextjs, NodeJs, Laravel, MongoDB, ExpressJs, .Net etc., which are all relevant for resolving issues with different payment gateways.
Throughout my career, I've successfully completed numerous projects where I've had to diagnose and resolve technical issues efficiently and effectively. My goal has always been to produce high-quality, error-free deliverables on or before the deadline - a principle that would certainly apply to this task as well.
I take pride in my exceptional coding structure and development practices that ensure optimal performance of web & mobile applications. It would be an honor to bring my expertise into play for your project and get your payment gateway functioning flawlessly across all interfaces. Let's get started!