Automation Engineer Interview Questions

It depends heavily on the company, and this ambiguity is the main thing to resolve before applying. In some organisations it is test automation and sits inside QA; in others it is infrastructure and CI/CD work overlapping with DevOps; in others it is business-process automation close to RPA. Read the tools in the posting — Selenium and Playwright mean testing, Terraform and Ansible mean infrastructure, UiPath or Power Automate mean process. Mirror the corresponding vocabulary on your CV.

Judgement about what not to automate, and building things that survive handover. Juniors write scripts that work; seniors write automation with logging, alerting on silent failure, idempotent behaviour on re-run, and documentation that lets someone else debug it. The interview question that exposes this is "your automation stopped running three weeks ago and nobody noticed" — a senior answer talks about heartbeat monitoring and alerting on absence, not just on errors.

Manual hours removed, error rates before and after, and reliability of the automation itself. "Automated the monthly reconciliation, removing 18 hours of manual work per cycle and eliminating the three recurring transposition errors that had triggered restatements" carries both the time saved and the quality gain. Also state how much of what you built is still running — automation that outlives your tenure is the strongest possible signal.

You need to be a competent one, and increasingly the bar is rising toward software engineering practice rather than scripting. Version control, tests for your automation, code review, and structuring code so it can be maintained by others are now expected in most postings. You do not need algorithm depth, but automation written as a single 800-line script with no error handling is the pattern that gets flagged in interviews.