System design

Bloomberg System Design Questions

Every system design problem candidates reported at Bloomberg between September 2025 and September 2026, most-asked first. Each one links to a full solution. Tick them off as you go.

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4problems
5candidate reports
1asked more than once
11topics
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Companies

Meta26Microsoft24Amazon23OpenAI22Google20TikTok16Salesforce15Anthropic15Uber12LinkedIn11Apple11JPMorgan11Atlassian11Snowflake9Netflix9Oracle9Goldman Sachs8Rippling8Databricks7Walmart7Airbnb7Capital One7NVIDIA6Pinterest6Roblox6Flipkart4Bloomberg4Visa4Adobe4Anduril1

Topics

Real-time market data: exchanges → loaders → UDP copies → processors
2 reports · last seen Jun 2026FintechReal-timeDistributed Systems
Advanced▶ Mock
Design A Low-Latency Holiday Lookup Service
1 report · last seen Jun 2026CachingAPI DesignFintech
Beginner▶ Mock
Design streaming mention analytics with search and alerts
1 report · last seen Mar 2026Real-timeSearchAnalytics
Advanced▶ Mock
Internal web app: onboarding, password reset, IT help; sensitive financial data
1 report · last seen Nov 2025SecurityAPI DesignDatabases
Intermediate▶ Mock

Duplicate reports of the same problem are merged and counted.

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Frequently Asked Questions

What system design questions does Bloomberg ask?

Candidates reported 4 distinct system design problems at Bloomberg between September 2025 and September 2026, including Real-time market data: exchanges → loaders → UDP copies → processors, Design A Low-Latency Holiday Lookup Service, Design streaming mention analytics with search and alerts.

How to prepare for Bloomberg system design interview?

Start with the Bloomberg problems reported most often, work through each full solution, then practice explaining a design end to end under time pressure in a mock interview.

What is the difference between HLD and LLD at Bloomberg?

HLD (High-Level Design) focuses on system architecture, scalability, and component interactions. LLD (Low-Level Design) dives into class diagrams, API contracts, and database schemas. Bloomberg tests both.