Robinhood Interview Questions
Master your tech interview with our curated database of real questions from top companies.
Diagnose Decline in First Day Funding Rate
Diagnostic Case: First-Day Funding Rate Drop Context You are on a product analytics team monitoring onboarding performance. The team observes a declin...
List Transactions During Active 'Gold' Membership Period
customer_profile +-------------+----------------+--------------------+-------------------+ | customer_id | membership_type| membership_start_date| mem...
Analyze Transaction Flow and User Engagement Efficiently
transactions +---------------+-------------+------------+--------+ | transaction_id| from_user_id| to_user_id | amount | +---------------+------------...
Identify Transactions During 'Golden' Membership Period
transaction +-----------+---------+------------+---------+ | trans_id | user_id | trans_date | amount | +-----------+---------+------------+--------...
Design in-memory payment and friendship system
Design and implement an in-memory payment system with simple social features. The system processes a sequence of requests that can: 1. Register a user...
Design a distributed job scheduler service
Design a distributed job scheduling system (microservice-based, running in the cloud) with the following requirements: Functional Requirements 1. Crea...
Compute trigger counts in a DAG
You are given a directed acyclic graph (DAG) that represents trigger dependencies between tasks. - Each node represents a task. - There is exactly one...
Write SQL to localize trading drop contributors
Use the schema and samples below. Unless stated, treat a user as active on a day if they attempted any order (any status). Dates are inclusive. Schema...
Prove causality for trading metric drop
Goal You need to separate market-driven fluctuations from a product-caused decline in executed_trades per active user around a known release on 2025-0...
Diagnose sustained drop in executed trades
Brokerage Analytics Troubleshooting: Trades Per Active User Down 22% Context You are the analyst for a brokerage product that spans onboarding through...
Write SQL and Python for transaction analytics
You are given user and transaction data. Part A (SQL): Use a join and window functions to answer the prompts below using the following schema and samp...
Design a referral leaderboard with chain-based counts
Design and implement a function that generates a referral leaderboard for a platform, given two equal-length arrays rh_users and new_users representin...
Implement string-based candlestick classifier
Implement a function that takes a single input string encoding N daily OHLC price records in the format "o1,h1,l1,c1;o2,h2,l2,c2;...;oN,hN,lN,cN" (sem...
Walk through project scope, ownership, and decisions
Behavioral: Walk Through a Significant Project (Technical Screen — Software Engineer) Provide a detailed walkthrough of one significant project you wo...
Create OHLC Aggregates from Tick Data in Python
price_stream +-----------+-------+ | timestamp | price | +-----------+-------+ | 0 | 3 | | 1 | 2 | | 2 | 4 | | 3 ...
Evaluate Core Metrics for New Product Feature Launch
Scenario You are a data scientist evaluating the health of a newly launched product feature in a consumer-facing app (e.g., investing/finance). The go...
Design Real-Time Analytics Pipeline with Kafka and Flink
Real-Time Clickstream Analytics Pipeline with Kafka and Flink Scenario You need to design a real-time pipeline that ingests website click events via K...
Identify Top Users with Declined Transactions in SQL
Transactions +----------------+---------+--------+----------+---------------------+ | transaction_id | user_id | amount | status | timestamp ...
Identify Overlapping Sessions and Optimize Coverage
Scenario During the technical screen, candidates must implement interval algorithms used in fraud-detection pipelines to reconcile overlapping user ac...