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Stellar Development Foundation Interview Questions

The questions to prepare for Stellar Development Foundation interviews, across all roles. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 5 questions · ~45 min
Recursive Subset SumHard
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Determine whether any subset of an array sums to a target using recursion only.

RecursionArraysAlgorithmsStellar Development Foundation
Implement a Versioned MapMedium

Evaluates your design and implementation skills for data structures that support historical versions.

Data StructuresStellar Development Foundation
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2
Execution7 questions · ~63 min
Maintainability in Large ProjectsMedium

Plan strategies to keep a large project maintainable as the codebase, team, and release pace grow.

strategiesautomated testingcode maintainabilityStellar Development Foundation
Debugging Performance BottlenecksHard

Diagnose and prioritize performance bottlenecks in a large-scale codebase without destabilizing delivery.

performance optimizationDebuggingdelivery managementStellar Development Foundation
Refactoring a Large CodebaseHard

Describe how you planned and executed a large refactor while balancing delivery risk, team alignment, and code quality.

refactoringStellar Development Foundation
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3
System Design5 questions · ~45 min
Peer-to-Peer Blockchain NetworkingHard

Design a peer-to-peer networking layer for a blockchain application with low latency, high reliability, and adversarial peers.

Networkingdistributed systemsdata transmissionStellar Development Foundation
Concurrency Trade-Offs in C++/RustMedium

Assesses understanding of concurrency primitives and their implications for correctness and performance.

c++concurrencyStellar Development Foundation
Scalable and Extensible DesignsMedium

Assesses design principles and patterns that support growth, change, and long-term evolution.

software designscalabilityStellar Development Foundation
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4
Behavioral & Leadership4 questions · ~36 min
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