After one phone screen, I was flown to Singapore for:

• 3 algorithm interviews
• 1 design interview
• 1 behavioral interview

I had an additional phone interview and finally passed the Hiring Committee (HC) at Level 3. With no prior years of experience (yoe), I can't complain. I'm now waiting for team matching, as headcount for the year has been used up.

Something similar to 8-Queens, i.e., backtracking with optimization.