DoorDash interview process (2026)

Round-by-round breakdown of the DoorDash software engineering interview across 3 levels and 17 rounds: interview mode, sample questions, and worked solutions.

DoorDash salary & ratings · All interview processes

Software Engineer (E3, Early Career)

Difficulty: Medium · Timeline: ~3-5 weeks · Recommended prep: 6-8 weeks · Cooldown: ~6 months

  1. Round 0: Recruiter screen

    Phone · ~20-30 min

    Mode of interview: Remote phone or video interview

  2. Round 1: CodeSignal online assessment

    Assessment · ~70 min · difficulty 3/5 · elimination round

    Mode of interview: Online assessment · CodeSignal

    Sample question: A city is a grid where 1 marks a serviceable block and 0 a non-serviceable one. Return the size of the largest delivery zone, i.e. the largest 4-directionally connected group of 1s. Input: n m, then the grid. Output: the max zone size.

  3. Round 2: Technical phone screen (DSA)

    Phone · ~60 min · difficulty 3/5 · elimination round

    Mode of interview: Live interview · CoderPad

    Sample question: You are given a dasher's event log of 2n tokens like P3 (pickup of order 3) and D3 (delivery of order 3). The log is valid if every order is picked up exactly once before being delivered exactly once, and exactly n distinct orders appear. Print true or false.

  4. Round 3: Onsite coding (practical)

    Onsite · ~60 min · difficulty 3/5

    Mode of interview: Onsite or virtual onsite interview

    Sample question: Given coordinates of m available dashers and one restaurant, return the k dashers closest to the restaurant by Euclidean distance (max-heap of size k or nth_element). Follow-up: how would this change if dashers stream in live?

  5. Round 4: Behavioral + hiring manager

    Behavioral · ~45 min · difficulty 1/5

    Mode of interview: Live behavioral interview

Software Engineer II (E4)

Difficulty: Hard · Timeline: ~3-6 weeks · Recommended prep: 6-8 weeks · Cooldown: ~6 months

  1. Round 0: Recruiter screen

    Phone · ~30 min

    Mode of interview: Remote phone or video interview

  2. Round 1: Technical phone screen (DSA)

    Phone · ~60 min · difficulty 4/5 · elimination round

    Mode of interview: Remote phone or video interview

    Sample question: DoorDash serves n delivery zones; m road links each connect two zones. Zones connected by any path form one super-zone for dasher assignment. Given n, m and the links, output how many super-zones remain. Follow-up: complexity of DSU vs DFS, and what changes if links arrive as a live stream.

  3. Round 2: Onsite coding 1 (DSA)

    Onsite · ~60 min · difficulty 4/5

    Mode of interview: Live interview · CoderPad

    Sample question: Build an autocomplete for restaurant search: given 10^5 restaurant names and then q prefix queries, return up to 5 matching names per query ordered by popularity score. Discuss Trie vs sorted-array+binary-search trade-offs, then implement one.

  4. Round 3: Onsite coding 2 (DSA)

    Onsite · ~60 min · difficulty 4/5

    Mode of interview: Onsite or virtual onsite interview

    Sample question: Given the root nodes of yesterday's and today's menu trees (each node: id, price, children), return the number of nodes that changed - added, removed, or price-modified. Nodes match by id; children order is not guaranteed.

  5. Round 4: System design + domain knowledge

    System_design · ~60 min · difficulty 4/5

    Mode of interview: Live system design interview

    Sample question: Design a ratings and review system for restaurants on DoorDash: submit/edit reviews, aggregate ratings shown on search surfaces, spam/abuse handling. Clarify scale, then cover APIs, storage, aggregation pipeline, and cache invalidation.

  6. Round 5: Behavioral + hiring manager

    Behavioral · ~45 min · difficulty 2/5

    Mode of interview: Live behavioral interview

Senior / Staff Software Engineer (E5-E6)

Difficulty: Hard · Timeline: ~4-6 weeks · Recommended prep: 8-10 weeks · Cooldown: ~6 months

  1. Round 0: Recruiter + hiring manager screen

    Phone · ~45-60 min · difficulty 1/5 · elimination round

    Mode of interview: Remote phone or video interview

  2. Round 1: Technical phone screen (DSA)

    Phone · ~60 min · difficulty 4/5 · elimination round

    Mode of interview: Remote phone or video interview

    Sample question: Count the number of valid event sequences for n orders, where each order's pickup must precede its delivery (all 2n events distinct). Derive the formula (product of odd numbers x n!) or a DP, and compute it modulo 1e9+7.

  3. Round 2: Onsite coding (DSA)

    Onsite · ~60 min · difficulty 4/5

    Mode of interview: Onsite or virtual onsite interview

    Sample question: Each cell of a grid holds a delivery time. Find the length of the longest strictly increasing path (4-directional moves). Solve with DFS + memoisation in O(mn); follow-up: return the path itself, then handle ties.

  4. Round 3: System design / architecture

    System_design · ~60 min · difficulty 5/5

    Mode of interview: Live system design interview

    Sample question: Design DoorDash's dispatch system: match incoming orders to dashers in real time across cities, minimising delivery time while balancing dasher utilisation. Cover geo-sharding, the matching loop, ETA inputs, surge/peak handling, and what happens when a dasher goes offline mid-delivery.

  5. Round 4: Domain knowledge / project deep dive

    Onsite · ~60 min · difficulty 4/5

    Mode of interview: Onsite or virtual onsite interview

  6. Round 5: Behavioral + leadership (HM)

    Behavioral · ~60 min · difficulty 2/5

    Mode of interview: Live behavioral interview

Other companies' interview processes

Worked sample solutions (code, design diagrams, and STAR answers) for every round are available in the FAANGPlus app: open interview processes.