Scale low-latency trading APIs on Robinhood's (Bitstamp) Core Exchange team

As a Senior Software Engineer on the Core Exchange team, you'll own core components of the Exchange REST API, FIX API, WebSockets, and market data services, optimizing for latency, reliability, and data correctness for active-trader clients. The role sits within Bitstamp's engineering division and requires on-call participation.

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What this interview tests

Low-latency, high-throughput distributed systems
Trading APIs (REST, FIX, WebSockets)
Data correctness and ordering guarantees under load
SQL (MySQL) / NoSQL (DynamoDB) data modeling trade-offs
On-call incident response for mission-critical systems

Common question themes

Describe a system you optimized for low latency and high throughput

How would you evolve a trading API without breaking active clients

How do you guarantee correctness and ordering in a real-time market data pipeline

MySQL vs DynamoDB — how would you choose for a given trading data problem

Walk me through an on-call incident on a critical trading system you owned

Tell me about aligning product, infra, and frontend teams on an API change

How candidates describe it

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