eToro Backend Engineer Interview Questions
The questions to prepare for a eToro Backend Engineer interview. Questions from real interview reports rank first. Updated daily.
Partition an eToro marker array containing two colors using two pointers in O(n) time and O(1) space.
eToroEvaluates streaming algorithm design under severe memory constraints.
eToroEvaluates operational awareness and monitoring for high concurrency.
eToroEvaluates schema design decisions that support correctness and throughput under contention.
eToroEvaluates understanding of indexing strategies and their effect on query plans and latency.
eToroCalculate weekly retention by signup cohort using CTEs, joins, date truncation, and distinct user counts.
Brex
PostmaneToroCompare PostgreSQL index strategies by read latency, write overhead, storage size, and an overall cost score.
Capital Technology GroupRewrite a slow distributed event query using predicate pushdown, pre-aggregation, joins, and deterministic ranking.
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Tests knowledge of resilient architectures and availability-focused design patterns.
eToroTests ability to decompose systems safely while managing boundaries, data, and operational complexity.
eToroAssesses systematic troubleshooting and performance diagnostics in live systems.
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