Most other job search tools scrape EVERYTHING from the source sites and do the matching on their end which I don't think works great. Especially the scraping part, one can't simply scrape all jobs that exist on linkedin.
So I think this approach will be a lot more accurate in finding jobs. Also have some features planned that should make it stand out, for example de-duplication of jobs posted multiple times in different locations.
What's your differentiator?