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Meta sits mid-transition between two interview loops in 2026. The legacy track still drives most candidates through CodeSignal-style OAs and tightly time-boxed coding rounds, while a new AI-Native loop layers in AI-assisted coding, AI-Enabled system design, and an AI-oriented behavioral round on top. Which track you land in depends on org and recruiter, not candidate preference.

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Coding·60 min
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AI Coding — Maze Solver

Meta's signature AI-Enabled Coding prompt. 4-5 progressive sub-tasks on a grid-maze codebase, building from bug-fix to BFS to key/door bitmask state to a Q5 bomb-blast variant added in April.

SWE
MLE
Infra Eng
RS
ai-coding
bfs
bitmask
simulation
+2
Last asked 2026-05-1321 related discussions

OJ Problems

practice in the online judge
421 total
Optimize Word Container / String Matching Queries (ParanoidEcho)Maze Solver with Keys and Doors (Grid BFS)AI Coding: Maze shortest path with keys/doors (BFS pitfalls)Coding: "伞二舅" + "妖气" variant (details missing)In-Memory Record Store with Timestamp and TTLIn-Memory Record Store: Add/Remove and Query by Exact Key/PrefixRemove Duplicates from Sorted ArrayHouse RobberMaximum Unique Characters Subset of WordsCompare Two Linked Lists' Concatenated StringsSubarray Sum Equals K (Variant)Kth Largest Element in an ArrayMaximum Unique Characters (Concatenation)Grid Maze Multi-Part Shortest Path (with Wall Breaking Cross Bomb)Sum Root-to-Leaf NumbersFlip One 0 to Maximize Island AreaSparse Vector Dot ProductCount Special Pairs (Even Product & Odd Distance)Design a WorkHoursRegister System (Attendance, Promotion, Salary, Grants)Grid Maze (multi-part questions)Python Data Processing: Merge two messy sources and compute a summary dictionarySQL Debugging: Fix an AI-generated query and address data quality issuesMax Total Characters by Selecting Words with Unique LettersMerge Two Sorted Interval ArraysLowest Common Ancestor in an N-ary Tree (Return the Ancestor)Progressive Maze Solver (Fix Tests → BFS Shortest Path → Movement Constraints → Keys & Doors)Design a Banking System (Progressive OOD, 4 Levels)Top K Largest Elements When N >> KCompiler Optimization Cost Estimator (Time and Memory)LeetCode problem (unidentified: “lc刘霸凌” + follow-up)

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