Meta (Facebook) : Infrastructure Engineer / DevOps Engineer (L5) : USA : Meta Full loop interview
Summary
I completed a full-loop interview for an L5 Infrastructure Engineer / DevOps Engineer role at Meta (Facebook) in USA in April 2025, which consisted of 4 rounds focusing on DSA, Behavioral, and System Design.
Full Experience
Interview Date: April 2025 Status: Completed All Rounds
Interview Format & Round Breakdown
Metaโs interview process was structured, fast-paced, and focused heavily on system-level problem solving and communication. There were a total of 4 rounds over 2 days, broken into:
Day 1 โ Technical Coding Rounds (Live CoderPad)
๐น Round 1 โ Data Structures & Algorithms (45 mins)
1. Merge Sorted Arrays In-Place
2. Level Order Traversal with Custom Sorting?
๐น Round 2 โ Data Structures & Algorithms (45 mins)
1. Tree BFS Level-wise Optimization: Variants on level-order traversal and memory-efficient implementation using deque, avoiding sorting inside BFS.
Day 2 โ Behavioral & System Design
๐น Round 3 โ Behavioral Interview (45 mins)
โข Tell me about a time you led a high-impact DevOps initiative
โข Describe a time you failed โ what did you learn?
โข Talk about a conflict across teams and how you resolved it
โข How do you drive alignment without authority?
โข Whatโs the most innovative solution you implemented recently?
โธป
๐น Round 4 โ System Design Interview (45 mins)
โข Design an Advertisement Delivery System โ similar to how Meta (Facebook) delivers personalized ads to users in near real-time.
Interview Questions (9)
Given two sorted arrays, merge them in-place.
Implement Level Order Traversal with custom sorting.
Variants on level-order traversal and memory-efficient implementation using deque, avoiding sorting inside BFS.
Tell me about a time you led a high-impact DevOps initiative.
Describe a time you failed โ what did you learn?
Talk about a conflict across teams and how you resolved it.
How do you drive alignment without authority?
Whatโs the most innovative solution you implemented recently?
Design an Advertisement Delivery System โ similar to how Meta (Facebook) delivers personalized ads to users in near real-time.
Preparation Tips
Core DSA: Focus on Arrays, Strings, Hash Tables, BFS, Sorting System Design: Practice Meta-level scenarios like: Instagram, News Feed, Chat, Proximity Service, TinyURL Discuss trade-offs, scaling, consistency, fault tolerance Behavioral: Prepare stories with measurable impact. Use STAR format and align with Meta values.