I applied online. The process took 2 months. I interviewed at Meta (Londres, Angleterre) in Sep 2024
Interview
1 round of problem solving
Interview Day:
1 round problem solving
1 round behavioural
2 rounds system design
I did so well on all rounds except the first design round. They said they wanted to redo a design round and I asked them to review the second design round as I did so well on it. They said that was a callibration round and I wasn'n in the random set of candidates where they'd use that round. So basically was an hour of my life wasted lol.
It was frustrating but I did a 3rd design round on a short notice as I had travel plans for a whole month ahead and unfortunately didn't make it.
I'd say everything else about the process was smooth and recruiters were extremely helpful
Interview questions [1]
Question 1
For problem solving I remember questions I'd categorise as leetcode mediums.
For system design I was asked:
- Design a trending topic engine for a social network
- Design Messenger
- Design LeetCode/CodeForces like system
Recruiter call was pretty standard, first round was 2 Meta tagged LC mediums in 45 minutes. On-site was 2 coding sessions of 2 LC mediums, a system design interview and a behavioral interview with an engineering manager.
Interview questions [1]
Question 1
How do you answer if someone asks how long a deliverable or project will take?
The entire process usually takes 3–8 weeks, depending on scheduling and the specific role. Coding interviews heavily emphasize common DSA topics such as arrays, strings, trees, graphs, BFS/DFS, heaps, hash maps, and dynamic programming. System design becomes increasingly important for E4+ positions.
Interview questions [1]
Question 1
Given an array of integers and a target value, return the indices of two numbers that add up to the target
Unexpectedly, the first question in the technical round felt familiar. It was about finding a subset of strings with unique character concatenation — same problem I had worked through on PracHub a few days earlier. The interview included a recruiter screen followed by a rigorous pair of technical interviews where I tackled data structures and algorithms alongside system design concepts. After successfully answering a few more challenging DSA questions, I received an offer. The entire experience was intense but ultimately rewarding, and I happily accepted the position.
Interview questions [1]
Question 1
Given an array of strings, pick a subset whose concatenation contains no duplicate characters, and return the maximum possible length of that concatenation.
