Conducting technical interviews without prior introduction is not a good picture. You can't expect people to invest in you if you don't show them that you care about your future employees. On top of that, conducting tests with algo problems doesn't highlight candidates' true experience. LeetCode problems are usually memorized (similar patterns). It's a clear sign that there is no management with engineering experience and perspective. This may be seen as a major red flag and might lead to hiring the wrong candidates which usually don't stay long in the company. This is a common mistake done by companies which try to follow what FAANG companies do and something tells me this is not a FAANG company.