QA engineer
Best for teams that need manual testing, exploratory testing, and test case design. QA engineers are your first line of defense but they do not build automation frameworks. Hire them when you need human judgment, not when you need scalable regression.
Automation engineer
Writes and maintains automated test scripts within an existing framework. Strong execution but may lack architecture depth. Best for teams that already have a solid framework and need execution capacity.
SDET (Software Development Engineer in Test)
Designs and builds automation frameworks from scratch. Understands architecture, CI/CD, code quality, and release systems. An SDET fixes the system, not just the tests. Hire an SDET when your automation framework is the bottleneck.
Which one should you hire next?
- If your framework is solid but you need more coverage: hire an automation engineer.
- If your framework is broken and releases are risky: hire an SDET or an SDET consultant.
- If you need exploratory coverage and process discipline: hire a QA engineer.
The most expensive mistake is hiring an automation engineer when you need an SDET. You get more tests but the system stays broken.