Overall, the process was drawn out, but this is expected for large companies.

There were three rounds in total:

• The first round involved a toy project where I had to solve bugs and implement missing features. It wasn't too difficult compared to the algorithm/data structure rounds common at most places.
• The second round was a discussion where they reviewed my resume and asked me to describe a past project in detail, probing deeply into my previous work. At the end of this round, there was a design question, which is not difficult if you've worked as a software engineer.
• The third round focused on company values, where they assessed my alignment with the five Atlassian values. For me, this was the most difficult round, more so than any of the technical aspects.

I liked the company culture as a whole, and the offer was quite good.

At the end, the recruiter was a bit pushy. When I asked for some time as I was waiting to hear from other companies where I was simultaneously interviewing, I was made to feel guilty for not being excited enough. I don't think this is reasonable; I have to decide where to spend the next three to five years, and this requires careful thought.

Other than this, it was an overall positive experience, and it's definitely a very good place to work.

Pair programming round: Fix a few bugs in a project and implement some features.

Follow TDD: Write a failing test for any bug and make it pass.

Use a debugger and step through in case you face any issues.

Unlike the usual whiteboard stuff common in interviews, this requires no practice whatsoever if you're a software engineer.

Values interview: This actually requires preparation.

Read up in advance on their values. Prepare instances from your past work where you had to exhibit these values. Practice one or two short stories for each value. Google for software developer behavioral questions.

Make sure to ask questions. One piece of negative feedback was that I didn't ask any questions about Atlassian, when the fact was that I had just read up a lot on them from their site, Glassdoor, and TeamBlind.