Senior Python Developer

Ready to find your next innovative Senior Python Developer? These sample interview questions will help you find the right candidates during the interview process.

Senior Python Developer Interview Questions

A Python Web Developer writes server-side web application logic using either Python 2 and Python 3 languages. A solid Python developer can easily adapt to the differences between the two. 

Your top Senior Python Developer has ample experience developing back-end components, connecting the application to other third-party web services and supporting the front-end developers by integrating their work with the Python application.

Keep an eye out for candidates who have:

  • Excellent communication skills
  • A team-playing attitude
  • The drive to constantly learn 
  • An understanding of basic algorithmic concepts
  • A wide understanding of databases

Though a degree seems attractive, this position is more about how voracious a learner your Python Developer is. 

Your best candidates will participate in hackathons, be active in tech forums and have a strong interest in learning the latest technologies. 

Top tip: Hire candidates willing to grow by making sure their personal career goals align with your company's mission.

Role-specific interview questions

  • Describe the tools and processes you use for linting, debugging and profiling.
  • Explain whether arguments in Python get passed by reference or by value.
  • Explain how memory is managed in Python.
  • Are functions considered first-class objects in Python? If so, explain why. 
  • Describe what makes a good unit test. What makes a functional one?
  • What are the core principles of a REST API and RPC?
  • Does Python use real threads if it uses a Global Interpreter Lock?
  • Give an example of a filter and reduce over an iterable object.
  • Define list and dict comprehensions.
  • Explain in simple terms Lambda expression forms a closure?
  • What are the key differences between Python 2.x and 3.x?
  • Can you have a producer thread reading from the network and a consumer thread writing to a file, really work in parallel? What about the GIL?
  • Implement a binary search of a sorted array of integers Using pseudo-code.

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