Atlassian vs Epam Systems: Interview Question Comparison

When preparing for technical interviews, understanding company-specific patterns is crucial. Atlassian and Epam Systems represent two distinct profiles: a major product-focused tech company and a large global engineering services provider. A direct comparison of their question banks reveals significant differences in volume, difficulty, and focus, which should shape your preparation strategy.

Question Volume and Difficulty

The raw data shows a clear divergence in both the number of questions and their difficulty distribution.

Atlassian's question bank is larger, with 62 total questions. The difficulty spread is 7 Easy, 43 Medium, and 12 Hard questions. This indicates a strong emphasis on Medium-difficulty problems, which are typical for assessing core algorithmic thinking and implementation skill under interview conditions. The presence of a notable number of Hard questions (nearly 20% of the bank) suggests that for certain roles or later interview stages, Atlassian expects candidates to tackle complex problems involving optimization or advanced data structure manipulation.

Epam Systems' bank is smaller at 51 questions, with a dramatically different difficulty curve: 19 Easy, 30 Medium, and only 2 Hard questions. This distribution skews heavily towards foundational and intermediate problems. The high count of Easy questions suggests their process may include more initial screening or focus on verifying solid coding fundamentals. The minimal number of Hard questions implies that the interview bar at Epam is less focused on solving highly complex algorithmic puzzles and more on practical, implementable solutions.

Topic Overlap

Both companies emphasize core data structures, but with subtle differences in priority that reflect their operational models.

The shared core topics are Array, String, and Hash Table. These are fundamental to software engineering and appear in virtually all coding interviews. Mastery here is non-negotiable for either company.

Atlassian's specific listed focus includes Sorting. This suggests questions that often involve rearranging data, finding optimal orders, or combining sorting with other techniques. A problem might involve custom comparators or applying a sort as a key step in the solution.

# Atlassian-style: Sorting with custom logic
def sort_by_frequency_and_value(arr):
    freq = {}
    for num in arr:
        freq[num] = freq.get(num, 0) + 1
    # Sort by descending frequency, then ascending value
    arr.sort(key=lambda x: (-freq[x], x))
    return arr

Epam Systems' specific focus includes Two Pointers. This is a crucial technique for solving problems on sorted arrays or strings, often related to searching, pairing, or removing elements efficiently. It highlights a preference for problems with optimal O(n) time and O(1) space solutions.

# Epam-style: Two Pointers on a sorted array
def remove_duplicates_in_place(nums):
    if not nums:
        return 0
    write_index = 1
    for read_index in range(1, len(nums)):
        if nums[read_index] != nums[read_index - 1]:
            nums[write_index] = nums[read_index]
            write_index += 1
    return write_index

Which to Prepare for First

Your preparation priority should be guided by your target role and the baseline skills required.

Prepare for Epam Systems first if you are early in your interview practice journey. The higher proportion of Easy questions and the focus on fundamental techniques like Two Pointers provide a solid, less intimidating foundation. Mastering this bank will build confidence and competency in core patterns that are also essential for Atlassian.

Prepare for Atlassian first if you are aiming for product companies or roles that demand high algorithmic rigor. The significant number of Medium and Hard questions requires deeper practice. Success here will naturally cover the difficulty level needed for Epam. However, ensure you don't neglect the straightforward, clean implementation expected in Easy questions, as they form the building blocks for more complex solutions.

Ultimately, a strong candidate will be comfortable with the shared core of Array, String, and Hash Table problems. Start with the company whose difficulty profile best matches your current skill level, then progress to the other.

For more detailed question lists, visit the Atlassian and Epam Systems pages.