Fix issues in my existing ecommerce site

I am in need of an experienced developer to fix the issues in my existing ecommerce site. The specific issue that needs to be addressed is payment gateway integration. Must have expertise in frontend and backend development, as well as integrating payment gateways. Prior experience with platforms like Shopify or WooCommerce is a plus. Project deadline is tight, so efficient and timely work is essential.
Platform:
- My site is built on a custom platform using Angular, nodeJS, Strapi, so experience with custom platforms is required.
Payment Gateway:
- I prefer to fix the issues in using Stripe payment gateway and have to create credit machanims.
Skills and Experience:
- Experience with custom ecommerce platforms
- Expertise in payment gateway integration, specifically with Stripe