Very unprofessional behavior from their recruiter. I sent them an email with questions regarding the interview process and stages, and received no answer. After two days, I sent a reminder email about my questions; still, there was no response. Since then, they haven't responded at all. The interview process stopped here.

BTW, the whole interview process is long, tiring, and inhumane. It consists of the following steps:

• Screen Call
• HackerRank coding test with 3 tasks
• Technical Screening with live coding exercises from advanced topics
• Technical Discussion with even more live coding and more advanced topics
• System Design interview covering scalability, concurrency, performance, clustering, and everything else
• Culture Fit and Behavioral questions

In the end, it is not even worth it because the salary is not competitive, and the company culture is toxic and dehumanizing.

Here are some key areas to focus on:

• Java concurrency
• System design, covering scalability, APIs, and microservices
• Algorithms and data structures