I applied online. The process took 2 weeks. I interviewed at Meta (Dublín, Dublín) in Sep 2014
Interview
3 rounds of interview. The HR person will let you know some of the questions in advance so that you can be well prepared. You will talk to HR first. A member from the team in the 2nd round. You will meet your future boss in the 3rd round and 2 other team members as well.
I applied through college or university. I interviewed at Meta (San Mateo, CA)
Interview
Coding / Technical Rounds: Solving practical coding or domain-specific exercises.System
Design: Architects a scalable system, focusing on handling trade-offs, scaling limits, and complete end-to-end solutions.
Behavioral: Focused on cultural fit, your ability to navigate ambiguity, and how you collaborate cross-functionally with engineers, designers, and product managers.
The process began with an initial recruiter phone screen focused on my background, product experience, and interest in Meta. This was followed by a series of virtual interviews covering product sense, analytical thinking, execution, and behavioral questions. Interviewers asked me to work through product design scenarios, discuss how I would prioritize competing opportunities, define success metrics, and describe examples of cross-functional collaboration and stakeholder management.
The final round consisted of multiple back-to-back interviews with product managers and cross-functional partners. Overall, the process was structured, professional, and challenging. The interviewers were engaged and provided clear expectations for each interview.
Tough interview overall—definitely not what I expected. The technical rounds were intense, particularly when they had me design an A/B test for the News Feed ranking algorithm. I had to discuss metrics and sample sizes in detail. Lucky for me, the time I spent on PracHub right before the interview helped me nail that deep-dive question as it mirrored what I practiced. The behavioral questions felt standard but were still challenging. After a whirlwind process, they extended an offer, which I happily accepted.
Interview questions [1]
Question 1
Design an A/B test to evaluate a new ranking algorithm for the Facebook News Feed. Walk through metric selection (engagement, time-spent, MSI, well-being), unit of randomization given network effects between friends, sample size and power calculations, how you'd detect novelty effects vs. true lift, and how you'd handle a guardrail metric regressing while the primary metric is up.