Customization of Multi-Vendor Apps/Web Panels

I'm seeking an experienced developer for my project, inclusive of app and web panel installation, integration of alternative OTP services, payment gateway inclusion, and updates suiting the Iraqi context.
- https://codecanyon.net/item/eshop-flutter-multi-vendor-ecommerce-full-app/34108271
- https://codecanyon.net/item/eshop-web-multi-vendor-ecommerce-marketplace-cms/34380052

Key tasks:

- Install apps and web panels.
- Integrate cheaper OTP service, other than Google.
- Include Zaincash and Fast-pay as payment options.
- Modify apps for broader usability, including re-skinning and cultural adaptations such as language and currency.
- Ensure apps are functional, stable, and bug-free before posting on Google Playstore and Appstore.

Skills & Experience:

- Proficiency in mobile app and web development.
- flutter and larval experience
- Familiarity with OTP services and payment gateway integration.
- Capability to resolve any bugs or functional issues.
- Experience in culturally appropriate design, particularly for the Iraqi context.
- Quick turnaround, as completion is needed ASAP.