Swiggy

Leading Indian food delivery aggregator with complex real-time logistics.

4 Rounds ~15 Days Hard

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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

All Roles Backend Engineer 7 Data Engineer 5 Data Scientist 5 Frontend Engineer 3 Machine Learning Engineer 7 Software Engineer 10

All Topics System Design 43 Algorithms 37 Machine Learning 20 Culture Fit 13 SQL 12 Leadership 11 Machine Coding 11 Big Data 9

Backend Engineer • Coding • medium

Given a list of orders with their preparation start and end times, find the maximum number of concurrent orders being prepared at any given time.

#Arrays #Sorting #Sweep Line Algorithm

Practice

Backend Engineer • Coding • medium

Merge K sorted arrays/lists. (Context: Merging timestamped logs from different microservices).

#Heaps #Divide and Conquer #Pointers

Practice

Backend Engineer • Coding • medium

Given a grid representing a city map with restaurants, customers, and roadblocks, find the shortest path for a delivery executive to pick up and deliver the food.

#Graphs #BFS #Shortest Path

Practice

Backend Engineer • Coding • medium

Find the Top K frequent elements in a stream of data (e.g., finding top K trending dishes in a locality).

#Heaps #HashMaps #Bucket Sort

Practice

Backend Engineer • Coding • medium

Given an array of integers representing restaurant ratings over time, find the sliding window maximum of size K.

#Sliding Window #Deque #Arrays

Practice

Backend Engineer • Coding • easy

Find the longest palindromic substring in a given string.

#Strings #Dynamic Programming #Two Pointers

Practice

Backend Engineer • Coding • hard

You have a list of delivery executives and a list of orders. Assign orders to executives such that the total distance traveled is minimized.

#Graphs #Bipartite Matching #Hungarian Algorithm #Greedy

Practice

Data Engineer • Coding • hard

Implement a rate limiter using the Token Bucket algorithm to throttle incoming API requests from restaurant POS systems.

#Object-Oriented Programming #Concurrency #System Design

Practice

Data Engineer • Coding • easy

Given an array of integers representing daily order counts, write a function to find the maximum sum of a contiguous subarray (Kadane's Algorithm).

#Arrays #Dynamic Programming

Practice

Data Engineer • Coding • hard

Write a program to find the shortest delivery route for a delivery executive given a grid with obstacles, a starting point, a restaurant location, and a customer location.

#Graphs #BFS #Pathfinding

Practice

Data Engineer • Coding • medium

Given a list of delivery partner active hours as intervals [start_time, end_time], write a function to merge all overlapping intervals to find the total active duration.

#Arrays #Sorting #Intervals

Practice

Data Engineer • Coding • easy

Given a massive web server log file, write a script to find the top 10 IP addresses making requests to the checkout API.

#File I/O #Hash Maps #Heaps

Practice

Data Scientist • Coding • medium

Write a Python function to find the maximum overlapping active orders given a list of order start and end times.

#Sorting #Intervals #Sweep Line Algorithm

Practice

Data Scientist • Coding • easy

Write a Python function to calculate the Haversine distance between two GPS coordinates (restaurant and customer).

#Math #Geospatial #Python

Practice

Data Scientist • Coding • medium

Given an array of integers representing order delivery times, write a function to find the longest contiguous subarray with an average delivery time below a given threshold.

#Sliding Window #Arrays #Prefix Sum

Practice

Data Scientist • Coding • easy

Write a Python script to parse a large JSON log file of user clicks and return the top 5 most frequently clicked restaurant IDs.

#Data Parsing #Hash Maps #Heaps #Python

Practice

Data Scientist • Coding • hard

Given a dataset of delivery coordinates, write an algorithm to find the optimal route for a delivery executive carrying batched orders.

#Graph Theory #Traveling Salesperson Problem #Heuristics #Dynamic Programming

Practice

Frontend Engineer • Coding • medium

Given an array of overlapping intervals representing a restaurant's operating hours, write a function to merge all overlapping intervals.

#Arrays #Sorting #Logic

Practice

Frontend Engineer • Coding • medium

Write a function to find the length of the longest substring without repeating characters in a given string.

#Strings #Sliding Window #Hash Map

Practice

Frontend Engineer • Coding • medium

Implement an LRU (Least Recently Used) Cache in JavaScript. It should have `get(key)` and `put(key, value)` methods, both operating in O(1) time complexity.

#Data Structures #Map #Linked List

Practice

Machine Learning Engineer • Coding • medium

Given a delivery bag with a maximum weight capacity W, and a list of orders with specific weights and delivery payouts, write a function to maximize the payout.

#Dynamic Programming #Optimization #Knapsack

Practice

Machine Learning Engineer • Coding • medium

Write a Python function to compute the NDCG@K given a list of predicted scores and a list of true relevance labels.

#Python #Array Manipulation #Math

Practice

Machine Learning Engineer • Coding • hard

A delivery partner needs to pick up orders from 2 restaurants and deliver them to 2 customers. Write an algorithm to find the shortest valid route (pickups must precede respective drop-offs).

#Graphs #Shortest Path #Backtracking #TSP

Practice

Machine Learning Engineer • Coding • medium

Implement a Trie data structure to support search autocomplete for Swiggy Instamart items. It should support insert, search, and return top 3 matching prefixes.

#Trees #String Manipulation #Tries #Design

Practice

Machine Learning Engineer • Coding • medium

Implement the K-Means clustering algorithm from scratch in Python using NumPy. Do not use scikit-learn.

#Machine Learning Algorithms #Python #Math #NumPy

Practice

Machine Learning Engineer • Coding • easy

Write a Python script using Pandas to perform stratified sampling on a dataset of 10 million Swiggy orders, stratified by 'city_id'.

#Python #Pandas #Data Processing

Practice

Machine Learning Engineer • Coding • medium

Given a list of active time intervals for a delivery executive (e.g., [[10, 12], [11, 15], [16, 18]]), write a function to merge overlapping intervals to calculate total active hours.

#Arrays #Sorting #Intervals

Practice

Software Engineer • Coding • hard

Write a program to assign N orders to M delivery executives such that the total wait time is minimized.

#Dynamic Programming #Bipartite Matching #Graphs

Practice

Software Engineer • Coding • medium

Given a matrix of 1s (serviceable areas) and 0s (unserviceable areas), find the number of distinct delivery zones (islands).

#Graphs #Depth-First Search #Matrix

Practice

Software Engineer • Coding • hard

Implement a trie-based autocomplete system for searching restaurant names and dishes that returns the top 3 matches based on historical search frequency.

#Trie #Design #Strings

Practice

Software Engineer • Coding • medium

Find the maximum number of active orders in any sliding window of 'W' minutes given a stream of order timestamps.

#Sliding Window #Queues #Two Pointers

Practice

Software Engineer • Coding • hard

Design a data structure to find the top K trending dishes in a specific geohash in real-time from a continuous stream of orders.

#Heaps #Hash Table #Stream Processing

Practice

Software Engineer • Coding • medium

Given a grid representing an Instamart warehouse where 0 is empty, 1 is fresh produce, and 2 is rotten produce, find the minimum minutes until all produce rots.

#Graphs #Breadth-First Search #Matrix

Practice

Software Engineer • Coding • medium

Implement an LRU Cache to store the most frequently accessed restaurant menus. It should support get() and put() operations in O(1) time.

#Design #Hash Table #Linked List

Practice

Software Engineer • Coding • hard

Calculate the minimum time required to deliver an order from a restaurant to a customer considering a city map represented as a weighted graph where edges are traffic delays.

#Graphs #Dijkstra's Algorithm #Shortest Path

Practice

Software Engineer • Coding • medium

Find the K closest delivery executives to a restaurant given an array of their [x, y] coordinates and the restaurant's location.

#Heaps #Geometry #Sorting

Practice

Software Engineer • Coding • medium

Given an array of delivery intervals [start, end], merge all overlapping delivery windows to find the continuous busy periods for a delivery executive.

#Arrays #Sorting #Intervals

Practice

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