Atlassian Coding Interview Questions
25 Atlassian coding interview problems with full optimal solutions — 4 easy, 18 medium, 3 hard. Every problem ships with multiple approaches (brute-force first, then the optimal), complexity tables for each, company-specific tips on what an Atlassian interviewer values, and a FAQ section.
Showing 3 problems of 25
- #127hardfrequently asked
127. Word Ladder
Word Ladder is the canonical Atlassian BFS-on-implicit-graph problem. Given beginWord, endWord, and a dictionary, return the length of the shortest transformation sequence such that each step changes one letter and every intermediate word is in the dictionary. Atlassian uses it to test whether you can identify when BFS is the right tool.
4 free resourcesSolve → - #295hardfrequently asked
295. Find Median from Data Stream
Find Median from Data Stream is Atlassian's two-heap design problem. Numbers arrive one at a time; return the median after every insert. Atlassian asks it because the same pattern appears in their Confluence analytics dashboards that surface live percentiles.
4 free resourcesSolve → - #297hardfrequently asked
297. Serialize and Deserialize Binary Tree
Serialize and Deserialize Binary Tree is an Atlassian-favorite design problem. Implement two methods that convert a binary tree to a string and back, with no shared state between them. Atlassian asks it because it tests cleanly whether you can pick an unambiguous traversal and reverse it.
4 free resourcesSolve →
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