Other · Bengaluru

InMobi.

A mobile advertising and marketing platform (ad exchange, DSP and SDKs) and, through Glance, AI-driven content on smartphone lock screens.

its questions lean on

ad serving and real-time bidding
event aggregation at scale
messaging internals
concurrency and data structures
rollouts and replication

The rounds, as candidates describe them

Problem solving (third-party)A 60-minute DSA round run by BarRaiser, an external interviewing platform, with Java questions.source ↗
Problem solving (InMobi engineer)A second DSA round after a discussion of your current project.source ↗
System design (senior roles)For a Staff Engineer, a system design round, then HM, a working-code round (an in-memory pub-sub), Director and HR.source ↗
Hiring managerTeam and culture fit, past work, and sometimes a design discussion.source ↗

Reported by candidates

From public interview write-ups; each links its source.

Design a Stock Exchange / Trading PlatformSystem design
SQ-13 · Zerodha Kite Trading Platform →W05 · DAY 05 · Leader Election and Coordination →reported in:LeetCode Discuss · InMobi Staff Engineer, Bengaluru (2022) ↗
Build an In-Memory Pub-Sub like Kafka (Machine Coding)Low-level design
LLD-08 · Design a Logging Framework (Pub-Sub) →IP-18 · Design a Distributed Message Queue →reported in:LeetCode Discuss · InMobi Staff Engineer, Bengaluru (2022) ↗
Design TwitterSystem design
SQ-10 · Twitter/X →IP-07 · Design a News Feed →reported in:LeetCode Discuss · InMobi SDE-2 Backend (2024) ↗LeetCode Discuss · InMobi SDE-2 Backend, Bangalore, Rejected (2024) ↗
Design a Web CrawlerSystem design
IP-05 · Design a Web Crawler →reported in:LeetCode Discuss · Glance (InMobi) SDE 4, Bangalore (2021) ↗
How does a hash table work internally, and how do you make it thread-safe?Concept
W00 · PART 5 · Operating System Concepts for System Design →reported in:LeetCode Discuss · InMobi, Microsoft, Flipkart, Intuit, Soroco SDE2 (2021) ↗
Design a Hospital Appointment System with Patient Priorities (LLD)Low-level design
no lesson for this one yetreported in:GeeksforGeeks · InMobi Interview Experience, On-Campus 2021 ↗
How do you deprecate a feature while rolling out its replacement to clients?Concept
W10 · DAY 03 · Deployment Strategies →reported in:LeetCode Discuss · InMobi SDE2, Bangalore Remote (2022) ↗
What goes wrong in a master-slave setup, and how do you debug it?Concept
W01 · DAY 02 · Replication Trade-offs →W05 · DAY 05 · Leader Election and Coordination →reported in:LeetCode Discuss · InMobi SDE2, Bangalore Remote (2022) ↗

Likely, from what they build

Our pick, not a report: questions that fit InMobi's products.

Design an Ad Click Aggregation SystemSystem design
IP-16 · Design an Ad Click Aggregation System →W08 · DAY 04 · Late-Arriving Data and Correctness →
Design a Real-Time Bidding Ad ServerSystem design
W02 · DAY 01 · Timeout Hell →W04 · DAY 05 · Multi-Tier Caching →W01 · DAY 04 · Hot Keys and Skew →
Design Ad Frequency Capping and Budget PacingSystem design
W01 · DAY 03 · Rate Limiting at Scale →IP-16 · Design an Ad Click Aggregation System →
Design a Personalised Lock-Screen Content FeedSystem design
IP-07 · Design a News Feed →W04 · DAY 04 · Feed Caching →SQ-21 · Instagram Feed and Stories →

Study path

Every lesson the questions above point to, once, in order.

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