Sure, no problem I'll take a look now!
So **this is your post URL: **<a>https://www.hackerearth.com/recruit/resources/e-books/a-complete-guide-to-talent-assessment-software/</a>
This time Moz Link Explorer has only detected one backlink to the post.
The link is from: https://www.yasteq.com/US/Fremont/123161387835128/HackerEarth
The site describes itself thusly: "One of the largest resources on the Internet for finding computer & electronics services and related businesses, worldwide." - so basically it's a local-themed business directory with a tech focus and content curation elements. You can tell that more easily by looking at the homepage (https://www.yasteq.com/). It only has 18 domain authority so that's pretty weak to be honest. The listing is relevant with a reasonable write-up - but it's from a place no one really cares about.
Majestic SEO (another tool) found this link: https://www.eventshigh.com/detail/Bangalore/48e3b2743f568bd46a83bb182fe91ce8-djangothon?src=ecbox whilst **Ahrefs found a separate link from the same site here: **https://www.eventshigh.com/detail/bangalore/63c53417b3eadb328fa3d568d970624c-travel-tech-meetup-with-goibibo
At a glance these just seem to be simple events listings. In most instances, links from these listings are either image-based or have no-follow set to true. Contrary to popular opinion, 'no-following' links does not prevent or discourage users or search engines from following a link (probably one of the worst named attribute values ever). What it does is it prevents Google from transferring any link equity (or 'SEO juice') through the link. The linking page (which hosts the hyperlink) will still lose some SEO authority, but at the receiving end you won't be gaining any (it just gets vented into cyberspace).
Seeing as the page hosting a hyperlink loses SEO equity either way (a measure taken by Google to stop PageRank sculpting from actually 'being a thing') - the only reason to no-follow hyperlinks these days is to avoid outbound Penguin penalties. This is where you are selling hyperlinks but want to tell Google "this link is somehow commercial or advertorial in nature, so don't weight it into your SEO ranking algorithm(s) for Google's results". Google will take that on board and it will prevent the link-host from garnering a penalty (for selling links to others with the intention of manipulating rankings, kind of like being labelled a drug dealer)
The domain actually has very strong metrics in Ahrefs, earning an Ahrefs domain rating of 70. They are probably aware of their site's SEO-clout and either don't want to be giving you a free ride (they expect you to pay for the equity) or they're very cautious about how they link, not wanting to lose the established authority they have built up via penalty / manual action. In any case, though the site is strong and you have links from it - those links are not sending you much / any SEO equity - so there's no party here amigo. Image-based links tend to transfer less equity anyway (even forgetting about 'nofollow') and they have no (user-visible) anchor-text to explain their relevance. Search engines do use image links as signals, but they're not such strong signals (as they're more ambiguous in general)
Ahrefs also found two links from "Mail Pug":
Both have a Domain Rating and URL Rating of zero in Ahrefs. Content doesn't actually seem that bad but... it's from a site with no equity to give you.
In basic terms, your really decent contextual (content-based) links are from sites no one cares about. On the one site with high metrics, they're refusing to transfer SEO equity to you for one reason or another. As such, no rankings for this post.
The reason why it's not ranking well is that although it may be detailed and well written, unlike your other post it didn't attract links. As such it's not deemed very shareable and it has very little SEO authority. You might say it's a vehicle with no fuel.
The reasons why it attracted no 'significant' buzz or attention online could be variable. Was it promoted as well as the other post? Like you suggest - were there CRO or UX defects in the design or copy of the content? I'll leave that side to you.