I recently clicked on an advertisement on StackOverflow about a job as a professional front end designer because I was interested.
I passed through the first stage of the application which was an online quiz to test my knowledge about front end programming plus some questions for personality test.
The day after, I got an email from the company saying that I have been invited to a solve a problem on Hackerrank as part of the application process so that they can assess my coding design.
The challenge was about creating a well-coded interview manager. (almost like a complete application). It was a 8 hours challenge. I did it.
After that, I haven't heard anything from the company anymore. Did they just steal my code? Made me work for 8 hours for free and ran away? Can I sue them for stealing my intellectual property?