Spotify Software Engineer Phone Screen Questions
3+ questions from real Spotify Software Engineer Phone Screen rounds, reported by candidates who interviewed there.
What does the Spotify Phone Screen round test?
The Spotify phone screen typically lasts 45-60 minutes and evaluates core Software Engineer fundamentals. Candidates should expect 1-2 algorithmic problems, basic system design discussion at senior levels, and questions about relevant experience. The goal is to confirm technical competence before bringing candidates onsite.
Top Topics in This Round
Spotify Software Engineer Phone Screen Questions
## Problem Given a string `s` and an integer `limit`, remove the minimum number of characters so that no character appears more than `limit` times consecutively. Return the resulting string. ```python def limit_consecutive_duplicates(s: str, limit: int) -> str: pass ``` ``` Input: s = "aaabbbcc", limit = 2 Output: "aabbcc" # 'a' appears 3x consecutively -> remove 1 -> 'aa' # 'b' appears 3x -> remove 1 -> 'bb' Input: s = "aaa", limit = 1 Output: "a" Input: s = "aabbcc", limit = 3 Output: "aabbcc" # already valid Input: s = "", limit = 2 Output: "" ``` ## Follow-ups 1. Is your solution a single pass? Prove it produces the minimum number of removals. 2. What is the time and space complexity? 3. Extend to limit the total (not just consecutive) occurrences of any character to `limit`. 4. If you cannot remove characters but can rearrange them, how would you solve the problem?
## Problem You have a collection of letter tiles (with repetition). Given a target word, determine the minimum number of additional letters you need to purchase (insert) so you can spell the word. Each tile can be used at most once. ```python def min_insertions_to_make_word(tiles: list[str], target: str) -> int: pass ``` ``` Input: tiles = ['a', 'a', 'b', 'c'], target = "aabbc" Output: 2 # Have: a=2, b=1, c=1. Need: a=2, b=2, c=1. # Missing: b=1. But also missing one 'b'. Wait: need b=2, have b=1 -> need 1 more b. # Answer = 1? Check: need a=2 (have 2 ok), b=2 (have 1, need 1 more), c=1 (have 1 ok) -> 1. # Let's use a cleaner example: Input: tiles = ['a', 'b'], target = "aab" Output: 1 # Have a=1,b=1. Need a=2,b=1. Missing: 1 'a'. ``` ## Follow-ups 1. What if tiles have costs and you want to minimize total cost, not count of inserted letters? 2. How do you handle case-insensitivity? 3. Extend: given multiple target words, find the minimum total insertions to spell all of them (tiles are shared). 4. What if tiles can be wildcards that match any letter?
## Problem You are given a list of song pairs `(a, b)` meaning song `a` was played immediately before song `b` in a playlist. Reconstruct the full playlist order. Assume the input forms a single valid sequence with no ambiguity. ```python def reconstruct_playlist(pairs: list[tuple[str, str]]) -> list[str]: pass ``` ``` Input: pairs = [("Shape of You", "Blinding Lights"), ("Blinding Lights", "Levitating"), ("Levitating", "Stay")] Output: ["Shape of You", "Blinding Lights", "Levitating", "Stay"] Input: pairs = [("B","C"), ("A","B"), ("C","D")] Output: ["A", "B", "C", "D"] ``` ## Follow-ups 1. How do you identify the starting song (the one that never appears as a "next" song)? 2. What if the pairs form a cycle — how would you detect and report that? 3. If some pairs are missing (gaps in the sequence), how do you handle discontinuous playlists? 4. Extend to reconstruct a sequence where each pair says song `a` played within 2 slots before `b` (not necessarily immediately before). How does the problem change?
What to Expect in the Spotify Phone Screen Round
The Spotify Software Engineer Phone Screen round has a specific calibration purpose distinct from other rounds in the loop. Across 3+ verified reports on LeakCode for this exact round type, the consistent expectations: clear scoping of the problem before diving into a solution, explicit reasoning about complexity, structured handling of edge cases, and the ability to discuss trade-offs between two reasonable approaches.
Reports tagged with the Phone Screen round at Spotify show recurring patterns in difficulty and topic distribution. The Phone Screen round is typically 45-60 minutes; the interviewer is calibrated against a specific rubric. The discriminator between candidates who advance and candidates who do not is rarely the final correctness of the answer. It is the path: did you clarify, did you verbalize your approach, did you handle edge cases, and did you communicate throughout.
How To Prepare for This Specific Round
Filter the questions below to the most recent reports (past 6-12 months). Questions tagged for this exact round type from this exact company at this exact role level are the highest-signal data available. Older reports may reference questions that have since rotated out of the company's pool.
Practice 4-6 representative problems from this set under timed conditions. The goal is not memorization (companies rotate questions); the goal is to internalize the patterns the interviewer typically reaches for and the depth of follow-up to expect. Reports on LeakCode also tag the typical follow-up depth at this round type, which is the discriminating signal between hire and no-hire calibration.
Phone Screen Round Timing and Format
The Phone Screen round at Spotify typically runs 45-60 minutes. Use the first 2-3 minutes to clarify requirements; you should never start coding or designing without verifying the input/output format, constraints, and edge cases out loud. Use the next 5-7 minutes to verbalize your approach before writing any code. The middle 20-30 minutes are implementation. Reserve the final 10 minutes for testing with concrete examples and discussing optimization or trade-offs.
Time budget discipline is one of the most reliable senior-vs-junior discriminators in this round. Strong candidates verbalize where they are in their budget out loud ("I've used about 20 minutes, I have 15 minutes left for testing and one optimization"). This signals engineering maturity to the interviewer and creates positive feedback they can capture in writing.
Common Failure Modes in This Round
Reports tagged "no hire" at Spotify Software Engineer Phone Screen commonly cite: coding silently without verbalizing approach, jumping to implementation before clarifying requirements, missing edge cases (empty input, single element, very large input), producing working code that the candidate cannot refactor when asked, and failing to test their solution with concrete examples before declaring done.
The single most predictive failure mode in 2025-2026 reports: not asking clarifying questions. Interviewers at all FAANG companies are explicitly trained to weight this dimension. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's notes.
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