I applied through a recruiter. The process took 5 weeks. I interviewed at MindTickle in Oct 2021
Interview
The entire interview process was smooth and almost took 4-5 weeks. Had 4 rounds with the organisation, (does not include other rounds like initial intro call, etc).
Round 1: Problem Solving round (taken by interview-vector) - Was asked two questions. Given LeetCode links and was asked to write the solutions to the questions. Was able to solve one (missed some test cases). For the second one, discussed the approach with interviewer, wasn't able to write fully runnable code.
Round 2: LLD round - Taken by MindTickle employee. Was asked to demo the solution by the end of the interview.
Round 3: HLD round - Had good round of discussion on different HLD concepts.
Round 4: Cultural fitment - Round with VP of Engineering. Had discussions on the previous projects that I've done, questions around them. Main focus was on how the candidate has ownership in the projects they've done earlier.
Q: Design a self pickup/drop off system for an e-commerce. A user can ask for the parcel to delivered to a nearby locker. Then a delivery person will drop the parcel the package. And the user can pick it up.
Flow
Delivery person will ask for the system to assign him a locker. System will then generate a unique code and locker and send it to the delivery.
When requesting for a locker. Locker can be assigned randomly (Extensible so that if in future package attributes can be taken into picture when allocating the locker)
System will then notify the user with the same unique code and lockerId. User can pick it up.
Once the package is taken is out, locker can be assigned to another delivery person.
Focus on:
Code modularity
Readability
Extensibility
Unit tests (If possible)
Q: Design a payment service - Interact with the wallet service, and make payment for the remaining amount via a payment gateway (credit cards, debit cards, etc).
Determine the order of payment. Pros and cons of payment with wallet first and then PG or payment with PG first and then wallet service.