Hi,
I have read your requirement to create 1500 dofollow backlinks for your website. I am new on freelancer but already done many projects like this in different platform. I can assure you to create DA 20-100 1500 dofollow backlinks. Which includes high authority domain source like microsoft, oracle, ted, google, adobe, amazon etc. and also create backlinks from educational websites (.edu) and government webistes (.gov) usa and india based to boost your authority of web page.
I use top natural link building method like article submission, contextual link building, Profile Backlink, Directory submission, Bookmarking, web 2.0 submission, pdf submission and infographic submission etc.
Thank you