Atlassian data engineering interview questions are the most SQL-window-function-heavy loop covered so far. Six of the curated eight problems are SQL—and five of those six lean directly on OVER (...) clauses for ranking, gaps-and-islands runs, frame-based moving averages, and continuous time-series. Expect aggregation for duplicate detection, daily ranking with ROW_NUMBER / RANK , subscription expiry math with date intervals, gaps-and-islands for consecutive runs, 3-day moving averages with ROWS BETWEEN , and continuous-day visitor counts via calendar tables. The two Python problems are classic complements: balanced parentheses with a stack, and first/last position via binary search. This guide walks through the eight topic clusters Atlassian actually tests, each with a detailed topic explanation , per-sub-topic explanation with a worked example and its solution , and an interview-style problem with a full solution that explains why it works.…