I am based in Dublin, and all the interviews are online.

In the beginning, I interviewed with team A. It took 4 rounds:

1. Background interview with HR, just some basic background information and profile browse.
2. Behaviour + Technical interview with a senior engineer.
3. Hackerrank assessment, which includes 2 easy-level coding problems, 5 technical quizzes, and 3 logical quizzes.
4. Behaviour + technical interview with 3 engineers.

Unfortunately, I wasn't selected.

I sent an email to HR to inquire about the interview result. She told me that they selected another guy but would like to schedule an interview for me with team B. It was only 1 round with the manager. I interviewed with the manager and finally got an offer.

Behaviour questions

• Why Udemy?
• Introduce my previous work experience
• A time I solved a problem with creativity
• What I will do when I meet a problem

Technical questions

• Design Patterns
• OOP
• HTTP request types
• Difference between GET and POST, when to use GET and when to use POST
• Difference between asynchronous and synchronous
• Promise, difference between promise and async
• What to do before publishing the program to the production environment
• Testing, what is a unit test, integration test, and what else do I know
• CI/CD
• What databases I have used
• When selecting MongoDB over MySQL
• How MongoDB makes the availability in CAP theorem
• When using Elasticsearch
• If I have customers in China and Ireland, how do I set the database server