European Southern Observatory Software Engineer Interview Questions

The questions to prepare for a European Southern Observatory Software Engineer interview. Questions from real interview reports rank first. Updated daily.

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Technical FundamentalsStart here. 9 questions · ~72 min

Tooling decision: C++ or PythonMedium

Assesses language choice reasoning in the ESO context.

pythonc++EEuropean Southern Observatory

Templates versus inheritance in C++Medium

Assesses design choices between templates and inheritance in C++.

c++EEuropean Southern Observatory

Python lambda and exampleEasy

Tests knowledge of Python lambdas and practical applications.

pythonEEuropean Southern Observatory

C++ uniform initializationMedium

Tests knowledge of uniform initialization semantics.

c++EEuropean Southern Observatory

Python decorators and usageMedium

Assesses understanding of Python decorators and practical use cases.

ProgrammingdecoratorspythonEEuropean Southern Observatory

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Behavioral & Leadership5 questions · ~40 min

Expectations for the RoleEasy

Tests role fit, motivation, and whether the candidate has clear expectations for scope, growth, and impact.

company fitrole expectationsmotivationEEuropean Southern Observatory

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