I had applied through employee referral. The process went through entire day, consisting of total 7 rounds. 1. Aptitude round, it was quite shocking to see an aptitude test for an experienced professional. Total 30 MCQ had to be completed in 1 hour. 2. JS and CSS round, normal JS and CSS questions like CSS position, string reversal without reverse, em and rem, fibonacci series etc. 3. Framework and Optimisation round, some questions related to Angular router (as I had experience in Angular), lazy loading, performance optimisation, 4. Advanced JS round, questions like setTimeout inside loop, const let and var, object copying, map reduce filter, debounce etc. 5. HR round, some discussions with HR. 6. Hiring Managerial round, questions related to performance optimisation of an e-comm site. Deep diving into lazy loading concept. 7. CTO round, 2 puzzles asked in final round. 3 Ants triangle puzzle and 5 breads minimum cooking time puzzle.