Process, Questions & AI Prep Tips
Bloomberg LP is the world's leading financial information company, with 300,000+ Bloomberg Terminal users and a proprietary network infrastructure used by every major bank and investment firm. Engineering interviews are technically rigorous with a strong emphasis on C++ and real-time financial data infrastructure. Bloomberg has a unique internal technology ecosystem and culture distinct from Silicon Valley tech companies.
A 30-minute call about your background in systems programming, financial data infrastructure, or distributed systems, and your interest in financial technology.
A 60-90 minute coding interview heavily focused on C++ including data structures, algorithms, and object-oriented design. C++ proficiency is effectively required.
Design a financial data infrastructure component such as a real-time market data distribution system, a financial calculation engine, or a high-availability data persistence layer.
A deeper discussion on networking infrastructure, the Bloomberg Terminal protocol, or a specific financial data problem like order book reconstruction.
An interview covering your approach to engineering in a financial context, collaboration, and how you handle the reliability requirements of systems used by traders during market hours.
Design Bloomberg's real-time market data distribution system that delivers quotes to 300,000 terminal users.
How would you build an order book reconstruction system from raw exchange message feeds?
Design a high-availability financial calculation engine for computing real-time bond pricing and analytics.
How would you implement the Bloomberg Messaging Service (IB) — a secure financial instant messaging platform?
Design a financial data persistence layer with replay capability for regulatory compliance.
How would you build a system to synchronize financial indices across 130 exchanges globally?
Implement a C++ template-based container that efficiently stores time-series financial data.
Design the Bloomberg Terminal connection manager that maintains persistent sessions for 300,000 concurrent users.
How would you build a system to detect and filter erroneous tick data (fat fingers) from market feeds?
Tell me about a time you built a system with strict reliability requirements where downtime had direct business impact.
C++ is not optional at Bloomberg — practice C++11/17 features including smart pointers, RAII, templates, and multithreading extensively.
Study financial markets at a meaningful depth — understanding equities, fixed income, derivatives, FX, and how exchanges work is important context for Bloomberg engineering.
Bloomberg has a proprietary technical ecosystem (BAS, BSTP, Bloomberg API) — study publicly available Bloomberg API documentation to understand their data model.
Understand low-latency networking concepts since Bloomberg operates its own proprietary network (Bloomberg Professional Service) connecting financial institutions globally.
Bloomberg has a distinct culture from Silicon Valley tech — emphasize reliability, precision, and engineering professionalism over move-fast startup energy.
Review Bloomberg's engineering blog and any available technical talks from Bloomberg employees to understand their architecture.
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