I applied through a referral, whole process took more then one month. First I got a hackerrank test consists of 15 MCQs related to javascript, css and html and 2 easy programming question. Then half an hour recruiter screening call, She asked question like, why change current company, why booking, are comfortable in relocating, current project description, tech stack and scalability and lastly knowledge about A/B testing. Then two technical rounds, In round they check the knowledge around javascript, css and html In second round they check knowledge around data structure.