The first stage to filter out the candidates is a HackerRank test with three challenges to solve: easy, medium, and difficult. There is a time limit of 85 minutes, which is barely enough time to finish them and have all test cases pass. HackerRank is frustrating because the test cases are hidden.

After passing the test, you have a screening call with some standard behavioral questions. I was told I was advancing to the technical interview and it was explained what was expected. After that, no interview was scheduled and I received no response to my emails. After two weeks, the recruiter got back to me saying the position I applied for was closed.

The first challenge was to find anagrams within an array of strings and remove strings that are anagrams of previous strings.

The second challenge involved a 3x3 keypad containing digits 1 through 9. The task was to randomly calculate the number of steps required to enter a code, based on the distance between numbers.

The third challenge was to fill a matrix where each cell represents a color, using a bucket fill algorithm that only paints adjacent cells. The objective was to calculate the number of fills needed to paint the entire matrix.