I understand from your description that you're looking for someone to create a page Cotisation + Paiement paypal form that involves system Cotisation (10€, 30€, 40€) + Don setting, with the ability to take in information from cotisees and/or donors (name, surname, email address, postal address), along with attachments and payment via PayPal.
I'm confident that I have the skills necessary to tackle this project: I have extensive experience in website and application development, especially around web design and development; I have a strong proficiency in programming languages such as Java, Python, and JavaScript; I have experience working with React, Angular, and Node.js frameworks; I have expertise in e-commerce development; I have knowledge of content management systems (CMSs); I have experience with API development; quality assurance testing is an important part of my work; ongoing maintenance and support are part of my service offerings; user interface & user experience design is another area I specialize in; along with constant training & development in order to stay up-to-date with industry trends & best practices.