Linkbuilding

I'm looking for someone who can help with link building services. Specifically, I'm looking to build high-quality guest posts (5-10 posts per article) on other websites related to crypto industry (cryptocurrencies, crypto exchanges, crypto wallets, P2P, etc.) both in English and Spanish. I'm open to suggestions for specific websites to target and I need the project to be completed within a week. The kinds of websites I'm looking for should have high domain authority and a good amount of traffic, and they should provide a natural fit for the topics I'm interested in. If you are experienced in link building and would be able to deliver high-quality guest posts within a week, I would love to hear from you.