Flipkart
Indian e-commerce giant tackling massive supply chain and scale problems.
4 Rounds
~18 Days
Hard
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
Backend Engineer
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Behavioral
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medium
Tell me about a time you had to push back on a Product Manager's requirements because of technical constraints or tight deadlines.
#Communication
#Stakeholder Management
#Prioritization
Backend Engineer
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Behavioral
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medium
Describe a situation where a system you built or maintained failed in production. What was the root cause, and how did you fix it?
#Ownership
#Incident Management
#Post-mortem
Backend Engineer
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Behavioral
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medium
Tell me about a time you had a fundamental disagreement with a senior engineer or architect regarding a system design choice. How did you resolve it?
#Conflict Resolution
#Leadership
#Teamwork
Backend Engineer
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Coding
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hard
Machine Coding: Design an in-memory Inventory Management System. It should support adding products, updating quantities, and processing concurrent orders without overselling. The code must be executable.
#Object Oriented Design
#Concurrency
#In-memory Data Structures
Backend Engineer
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Coding
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hard
Machine Coding: Design a Ride-Sharing Application (like Uber/Ola) with features to register riders/drivers, request a ride, match the nearest driver, and calculate the fare.
#Object Oriented Design
#Algorithms
#Low Level Design
Backend Engineer
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Coding
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medium
Machine Coding: Design a Task Management System (like Jira). Users should be able to create tasks, assign them, change statuses, and search tasks by tags or assignees.
#Low Level Design
#Search
#State Machines
Backend Engineer
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Coding
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hard
Machine Coding: Design a Splitwise-like expense sharing application. Support equal, exact, and percentage-based splits, and implement a feature to simplify debts.
#Graph Algorithms
#Low Level Design
#Math
Backend Engineer
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Coding
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hard
Machine Coding: Design an E-commerce Cart and Promotion Engine. Apply different types of coupons (e.g., 10% off on category X, BOGO) and calculate the final cart value.
#Design Patterns
#Rules Engine
#Low Level Design
Backend Engineer
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Coding
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medium
Design a data structure that supports adding a product to a cart, removing a product, and getting the most recently added product in O(1) time. (LRU Cache variant)
#Linked List
#Hash Map
#Design
Backend Engineer
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Coding
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medium
Given a grid representing a warehouse where 0 is empty, 1 is fresh produce, and 2 is rotten produce. Every minute, rotten produce infects adjacent fresh produce. Find the minimum time to rot all produce.
#Breadth-First Search
#Graphs
#Matrix
Backend Engineer
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Coding
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medium
Given arrival and departure times of delivery trucks at a Flipkart fulfillment center, find the minimum number of loading bays required so that no truck is kept waiting.
#Sorting
#Greedy
#Arrays
Backend Engineer
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Coding
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hard
Given a string representing a search query without spaces and a dictionary of valid products, add spaces to construct all possible valid product combinations. (Word Break II)
#Backtracking
#Dynamic Programming
#Trie
Backend Engineer
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Coding
•
medium
Find the top K most frequently purchased items in a stream of order logs.
#Heap
#Hash Map
#Bucket Sort
Backend Engineer
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Coding
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hard
Merge K sorted lists of product IDs returned from different regional databases into a single sorted list.
#Linked List
#Divide and Conquer
#Heap
Backend Engineer
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Coding
•
medium
Find the longest increasing subsequence of prices for a stock over a given period.
#Dynamic Programming
#Binary Search
Backend Engineer
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Coding
•
hard
Find the shortest path for a delivery drone in a 2D grid with obstacles. The drone can eliminate at most 'k' obstacles.
#Breadth-First Search
#Matrix
#State Space Search
Backend Engineer
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Coding
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hard
Given two sorted arrays of user ratings for a product, find the median rating in O(log(m+n)) time.
#Binary Search
#Divide and Conquer
#Arrays
Backend Engineer
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Coding
•
hard
Trapping Rain Water: Given an array representing the heights of stacked inventory boxes, compute how much water can be trapped between them after a roof leak.
#Two Pointers
#Dynamic Programming
#Stack
Backend Engineer
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System Design
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hard
Design Flipkart's Big Billion Days Flash Sale system. Millions of users will try to buy a limited inventory of 10,000 iPhones at exactly 12:00 PM.
#High Concurrency
#Caching
#Message Queues
#Database Locking
Backend Engineer
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System Design
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medium
Design a Distributed Rate Limiter for Flipkart's public API to prevent scraping and DDoS attacks.
#Redis
#Algorithms
#Distributed Systems
Backend Engineer
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System Design
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hard
Design an Order Management System (OMS) that handles order creation, payment confirmation, inventory deduction, and shipping initiation.
#Microservices
#Saga Pattern
#Event-Driven Architecture
Backend Engineer
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System Design
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medium
Design a highly scalable Notification Service capable of sending SMS, Email, and Push notifications to millions of users during promotional events.
#Message Queues
#Microservices
#Third-party Integration
Backend Engineer
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System Design
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hard
Design Flipkart's Search Autocomplete system. It needs to suggest products as the user types, with latency under 50ms.
#Trie
#Caching
#Data Aggregation
Backend Engineer
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System Design
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medium
Design a Leaderboard system for a Flipkart gaming/engagement zone where millions of users earn coins and the top 100 users are displayed in real-time.
#Redis
#Sorted Sets
#Databases
Backend Engineer
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System Design
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hard
Design a Distributed Cache system from scratch (similar to Memcached or Redis).
#Consistent Hashing
#Eviction Policies
#TCP/IP
Backend Engineer
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System Design
•
hard
Design a Payment Gateway integration service. It must handle routing to multiple payment aggregators (Razorpay, Stripe) and ensure no double charging.
#Idempotency
#State Machines
#Webhooks
Backend Engineer
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System Design
•
hard
Design Flipkart's Last-Mile Delivery Routing System. Given a delivery executive and 50 packages, determine the optimal route.
#Graph Algorithms
#Geospatial Data
#Heuristics
Backend Engineer
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System Design
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medium
Design a Product Catalog System. It must support millions of products, diverse attributes (electronics vs clothing), and rapid reads.
#NoSQL
#Elasticsearch
#Data Modeling
Backend Engineer
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Technical
•
medium
Explain how you would handle concurrent updates to an inventory item in a relational database to prevent overselling.
#Concurrency
#ACID
#SQL
Backend Engineer
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Technical
•
medium
What are the differences between pessimistic and optimistic locking? When would you use which in an e-commerce context?
#Locking
#Transactions
#Performance
Backend Engineer
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Technical
•
medium
How does Apache Kafka achieve such high throughput compared to traditional message brokers like RabbitMQ?
#Kafka
#I/O
#Architecture
Backend Engineer
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Technical
•
medium
Explain the internal working of ConcurrentHashMap in Java. How did it change from Java 7 to Java 8?
#Multithreading
#Data Structures
#Java Internals
Backend Engineer
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Technical
•
medium
Write a SQL query to find the top 3 selling products in each category for the last month, considering ties in sales volume.
#Window Functions
#Joins
#Aggregations
Backend Engineer
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Technical
•
hard
How do you troubleshoot a memory leak in a Java Spring Boot application running in production?
#JVM
#Profiling
#Debugging
Backend Engineer
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Technical
•
medium
Explain Redis persistence mechanisms. If Flipkart uses Redis for cart management, which persistence strategy would you choose and why?
#Redis
#Data Durability
#Architecture
Difficulty Radar
Based on recent AI-sourced data.
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Senior EngineerFocuses on core competencies, system constraints, and clear communication.
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Always explain your thought process before writing code or drawing architecture.