The interview was off topic and focused on a lot of irrelevant stuff. I will not recommend this position to candidates because they have have been interviewing candidates but not a single one has been hired, moreover they delay the process so much and do not respect a candidate's time. I have met about more than 100 people int eh community for this particular role and everybody and the same opinion as me. This feedback is not because I did not get hired, instead I gave the interview thrice with all of them not being serious for this position at all. I have consulted about this with the folks in the m=company and they said that "yes, its unfortunate, but can happen".
Positive experience
Average interview
Application
I interviewed at Meta (Dublin, Dublin)
Interview
Full loop interview with 3 parts: Networking, SWE, Behavioural. Each 60 minutes. Networking interview: Asked about TCP, BGP, IP protocols, also about ARP protocol and Ethernet. SWE was a classic Meta SWE interview.
I applied through a recruiter. The process took 4 weeks. I interviewed at Meta (London, England) in Aug 2025
Interview
Disappointing Experience – Strong Performance but No Offer Despite Positive Feedback
I recently interviewed for a Network Production Engineer position at Meta (London). The process included a screening round where I successfully solved both coding problems:
• Problem 1: Battleship problem.
• Problem 2: Reading a file and finding repeated occurrences of words, along with explaining time and space complexity.
The first technical round covered networking fundamentals (TCP/IP, basic network topology, H-S-R-S-H communication, packet drop analysis, TCP flow control, and congestion control). I performed well in both rounds and received positive feedback from the interviewers.
However, five days later, I received a rejection email, stating they were “moving forward with other candidates.” Seeing the same position reposted on LinkedIn shortly afterward was frustrating and disheartening.
When I asked one interviewer about Meta’s work-life balance, his response felt dismissive and unprofessional, which added to the negative impression.
Advice to Management:
Please provide constructive feedback to candidates and maintain professionalism during all interactions. Transparency in the hiring process would improve candidate experience significantly.
Interview questions [1]
Question 1
Problem 1: Battleship problem.
• Problem 2: Reading a file and finding repeated occurrences of words, along with explaining time and space complexity.
The first technical round covered networking fundamentals (TCP/IP, basic network topology, H-S-R-S-H communication, packet drop analysis, TCP flow control, and congestion control). I performed well in both rounds and received positive feedback from the interviewers.
The process began with an online assessment covering networking, Linux, and coding fundamentals—15 MCQs in 16 minutes. Topics included TCP/IP, BGP, Python, troubleshooting, etc.
After passing, I moved on to two 45-minute technical interviews:
Coding Round: Focused on file handling, data structures, Big-O notation, and common algorithms.
Networking Round: Scenario-based, covered optical networking, switching/routing, and L0/L1 troubleshooting.
Pros:
Challenging but fair technical questions.
Interviewers were professional and respectful.
Process was well-organized and moved quickly.
Cons:
No detailed feedback post-interview.
Some questions were very Meta-specific with little public prep material.
Overall:
Great opportunity to demonstrate both software and deep networking skills. Would recommend preparing in-depth for both domains—especially optical layer concepts.
Interview questions [1]
Question 1
Walk me through how you'd troubleshoot a server that's not reachable.
What happens when you type a URL in a browser?
How does BGP work and when would you prefer it over OSPF?
Describe a time you troubleshooted a complex network issue.
Explain how TCP handshake works.
What's the difference between TCP and UDP?
How do you find a memory leak in a Python script?
What are common causes of high CPU usage on a Linux server?
Explain optical networking and the challenges at Layer 0/1.
How does DNS resolution work behind the scenes?