Why do you need a QA engineer on your team?

A QA engineer guards the quality of your software before a user ever touches it: writing test cases, checking new functionality, maintaining automated tests, and watching for regressions before every release. As a result your team finds defects in the sprint where they are introduced, instead of in production at a customer.

What does a QA engineer do in a development team?

A QA engineer turns acceptance criteria into concrete test cases, tests new functionality before it reaches production, automates the checks that come back every sprint, and reports findings in a way a developer can reproduce. The role also watches regression: does everything that worked last month still work today?

Day to day that comes down to:

• Making acceptance criteria testable, together with the product owner, before building starts.
• Testing new functionality on the main scenario and on the edge cases around it.
• Writing and maintaining automated tests, for example end-to-end with Playwright or Cypress plus API tests in the CI pipeline.
• Running regression tests before every release, so older functionality keeps working.
• Recording findings so they can be reproduced: steps, expected behaviour, actual behaviour, environment and version.
• Managing the test environment and test data, so the same test gives the same result tomorrow.

Why do you need a QA engineer if your developers test their own work?

Developers mostly test whether their own change does what they intended. A QA engineer tests what happens when a user does something else: submitting an empty form, clicking pay twice, returning with an expired session, cancelling an upload halfway. Those scenarios rarely live in the code someone has just spent two days on.

The difference shows up in when you find the defect. If it surfaces during the sprint, the developer who is still in that code fixes it right away. The same defect after a release costs a support ticket, a reproduction by someone who does not know the code, a hotfix, an extra deploy, and an explanation to the customer.

A second pair of eyes also changes the conversation in refinement. Once someone is at the table who has to verify the acceptance criteria, those criteria get written down more sharply. Vague criteria otherwise surface on testing day, when correcting course is more expensive.

When do you add a QA engineer to your team?

Add a QA engineer once testing structurally slips or keeps landing on the same developer. Other triggers: the same kind of defect keeps returning, releases slip because nobody wants to sign off on quality, or you are launching a product that customers will work in daily.

Concrete signals:

• The same category of bug returns in consecutive releases.
• Testing falls to whoever has time, so coverage varies from sprint to sprint.
• You are launching a new product or a large release without a test plan.
• Support reports problems your team could have found itself.
• You want automated tests, but nobody gets round to building and maintaining them.
• Your release frequency rises and manual regression no longer fits in the sprint.

Manual testing or test automation?

You need both. Test automation covers the paths that have to be checked again every sprint: logging in, searching, ordering, paying. Exploratory manual testing finds behaviour nobody had in mind when the test was written. The QA engineer builds the automation and keeps room for exploratory work on new functionality.

Automation pays off through repetition. A suite that runs on every pull request tells you within minutes whether something broke. That same suite loses its value once tests fail at random without a real cause, because the team then starts ignoring the result. Maintaining those tests is therefore part of the QA engineer’s job and takes time every sprint.

How does a QA engineer work with developers and the product owner?

The QA engineer joins refinement, so acceptance criteria are testable on paper before anyone starts building. During the sprint the role tests what is finished and sends findings straight to the developer. At delivery there is a substantiated picture of what has been tested and what has not.

Agree together on what “done” means. A common arrangement: the functionality is built, the automated tests pass, the QA engineer has walked through the main scenario and the edge cases, and any open findings have been consciously accepted or fixed. Without that agreement the discussion moves to the end of every sprint, when the release is already scheduled.

How do you fill the QA engineer role: contractor, test agency, or extended team?

There are three routes: hiring a freelance or contract tester, outsourcing the testing to a test agency, or having a QA engineer work inside a nearshore extended team. They differ on three points: who steers the role day to day, how long the same person stays with your product, and where the test knowledge sits afterwards.

Hiring in is the fastest route and fits a peak: getting through a release period, testing a migration. The contractor works by the hour and leaves when the assignment ends, along with what they learned about your product. What stays behind is what was written down: test cases, automated tests and reproducible findings.

A test agency takes over testing as a whole, usually with its own team and its own way of working. That works for a bounded assignment, for example an acceptance test before a large release. The agency does sit outside your sprint: someone who is not in refinement cannot sharpen the acceptance criteria before building starts.

In a nearshore extended team the QA engineer joins your team, on your board, with your definition of done. A partner handles hiring, office, HR and contracts; you decide what gets tested and when. That asks something of you as well: the role works in your rhythm and expects priorities and a call on what may go live. The wider trade-off between these models, for your developers too, is covered in software agency, in-house, or nearshore extended team.

Backstage IT builds these teams in Chișinău (Moldova), which runs one hour ahead of the Netherlands, so a bug reported in the morning can be triaged the same day. A team is usually operational in 3 to 6 weeks, depending on the profile, and you can start with one QA engineer alongside your existing developers.

Not sure whether your team is ready for its own QA engineer? Lay out your situation briefly and we will look at what your testing process is missing today. Get in touch.