What Does a QA Engineer Do? Testing as an IT Career
Basics3 minInnovialabs editorial team
In short
A QA engineer safeguards product quality: checking that everything works as required, finding and describing bugs, and in automation, writing code that runs the checks automatically.
The short answer
A QA engineer (Quality Assurance) makes sure a product works as intended and that as few bugs as possible reach users.
This is not someone who "just clicks buttons". A good QA engineer thinks like a user and like an attacker at the same time: they test not only the main flow but also odd, edge-case and incorrect actions. Even more importantly, they get involved early so bugs are prevented, not only caught at the end.
Manual versus automated testing
| Manual QA | QA Automation | |
|---|---|---|
| How checks are done | You walk through scenarios in the product yourself | You write code that walks through them |
| Strengths | New features, usability, unusual scenarios | Regression, repetitive checks, large volumes |
| What you need | Test design techniques, bug trackers, web basics | The same plus a programming language and a test framework |
| Entry barrier | Lower | Higher |
In practice the two complement each other. Many people start with manual testing and gradually move into automation.
A simple automated test in Playwright:
import { test, expect } from "@playwright/test";
test("login page shows error for wrong password", async ({ page }) => {
await page.goto("/login");
await page.fill("#email", "user@example.com");
await page.fill("#password", "wrong");
await page.click("button[type=submit]");
await expect(page.locator(".error")).toBeVisible();
});
Daily responsibilities
- Reviewing requirements: spotting contradictions and gaps before development starts.
- Test design: writing test cases and checklists that define what to check and how.
- Testing new features across devices and browsers.
- Regression testing: making sure new changes did not break existing behavior.
- Writing bug reports and verifying fixes.
- API testing: checking server requests and responses, for example in Postman.
- Taking part in planning and retrospectives with the team.
How to write a good bug report
The bug report is the core QA tool. A developer should understand the problem without follow-up questions:
- Title: what is broken and where.
- Steps to reproduce: numbered and precise.
- Expected result and actual result.
- Environment: device, browser, app version.
- Attachments: screenshot, video, logs.
Keep one problem per bug report. When several bugs are bundled into one report, they are harder to track and harder to verify once fixed.
Career paths inside QA
- Junior → Middle → Senior QA: from running prepared test cases to designing a project's whole testing approach.
- QA Automation: automated tests and integrating checks into CI/CD.
- Specializations: performance, security or mobile testing.
- QA Lead: organizing the quality process and leading a testing team.
- Moving to neighboring roles: development, business analysis, project management.
Why QA is a common entry point into IT
- A lower technical barrier for manual testing: you can start without deep programming.
- You see the whole product: QA works with requirements, design, frontend and backend.
- Team experience and an inside view of how software is built.
- A natural path into automation and development for those who want to write code.
Keep in mind that the lower barrier means junior manual-testing roles can be highly competitive. Knowing the basics of SQL, APIs and some programming makes a candidate stand out.