I applied in-person. The process took 4 weeks. I interviewed at TOSAN (Tehran, Tehran) in Feb 2021
Interview
1) Meeting 1: Informal interview with one technical developer
2) Meeting 2: Formal interview with 2 technical developers, One HR
3) Meeting 3: With only HR that describes the contract in details
Very great interview. Asked several algorithmic questions. Three rounds of interview. First round was about algorithm, second was technical asking about spring boot and java related stuff, third about my preferences.
You must interview in 3 session. First a simple interview for know job seeker. Second is an expert interview with hard technical question. and third one is a final session about benefits and salary.
Interview questions [1]
Question 1
They ask about Object Oriented Programming in any interview