Backlinking for SEO

I am looking for an experienced SEO specialist who can help me improve my website’s ranking through backlinking. My website’s domain is new, and I am looking for guest post backlinks from niche-relevant directories. I am aiming for more than 50 backlinks in total. The ideal candidate should have a strong understanding of SEO and experience with guest post backlinks. They should also have experience with niche-relevant directories and be able to provide high-quality backlinks.