Design in-game payment wallet system
RobloxSoftware Engineer · Technical Screen
Last updated
Design in-game payment wallet system evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Question
Design a payment system for an online game that supports in-game currency transfers between accounts. Provide data models and APIs to enable:
- querying any account’s total inflow and outflow over the past 24 hours, and
- retrieving an hourly balance time series for the past 30 days for any account.
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