I applied online. The process took 4 weeks. I interviewed at Hopper (Singapore) in Nov 2022
Interview
Initial round went ok, Hopper is hiring in Asia because the Asian travel market requires different features. Their tech stack is mostly Scala after their migrated their Python and Golang services over.
Interview with hiring manager showed that the particular team (APAC flights) was basically empty of engineers. The hiring manager joined 6 months prior and 2 engineers resigned plus one engineer was let go during this time. I wouldn't call this an instant red flag, but it's definitely something to look out for.
For the tech screening, even as a senior engineer you're still expected to do basic LeetCode/Hackerrank questions. The interview is conducted in the hackerrank IDE which defaults to Python.
1. initial round with APAC engineering lead
2. Hiring manager conducts "screening round"
3. Hiring manager conducts "on site round"
4. Early employee conducts final round.
Interview questions [1]
Question 1
Given a set of flights origins and destinations, an origin, a destination, provide all flights possible from origin to destination.
A, B
B, C
A, C
with origin A and destination C,
means A->C, A->B->C