By the way, there is also a way to find good workers. You can post a job on some job websites with an advertisement. I think you will get better quality replies to a job posting. Personally, I use such jobs to find SEO specialists. This is a good method to have an opinion about your projects...
Well, I do not suggest using Upwork for all SEO staff you need to do. But the question was about spanish linkbuilding. I have an experience with some Upworkers. They worked pretty well. Maybe, I had a good result because everyone who was working with me was passing test run and if they make it...
I'd suggest looking for some freelancers. I think Upwork will work well for this purpose. There are a lot of guys for any region. I had test link package several months ago from there. Most of them were good enough. But I should warn you about one moment. You should discuss with the freelancers...
I am allowed to post several links in one message, but here you go. You need to replace 'space' before 'com' with the dot.
calvinayre com/2018/02/09/conference/london-conference-week-2018-day-four-recap-lac-video/
calvinayre...