What Is a QA Tester? Skills, Requirements, and Jobs in 2025

A website crash can be chaotic. Software glitches can drive users away. You have probably experienced firsthand the frustration of flawed technology. As a quality assurance (QA) tester, you can ensure websites and applications run smoothly. In this article, learn more about what a QA tester does and earns.

If you're ready to start preparing for a QA tester role, consider enrolling in the University of Leeds' online course, Foundations of Software Testing and Validation. In as little as five hours, you'll understand the different types of software testing and apply industry standard techniques to design effective test cases.

What is QA testing?

A QA tester is someone who experiments with software or websites to ensure they run smoothly and meet functional requirements. Their goal is to prevent faulty technology and frustrating user experience (UX) from making their way to the customer. QA testers accomplish this by running a variety of manual and automated tests throughout the software development process. The goal is often to break the product or force it to malfunction. This empowers the development team with the knowledge they need to make product adjustments before it goes to market.

Read more: How to Write Test Cases: A Step-by-Step QA Guide

Can you QA test an API?

Yes, there are various tools and techniques you can familiarize yourself with if you're interested in API testing. Get started with an online course by enrolling in Postman Tutorial: Getting Started with API Testing. In as little as five hours, you can learn to create and configure API testing environments.

What do QA testers do?

QA testing is an essential part of the software development life cycle. It ensures that an organization's product is as high-quality as possible. The list below outlines a few ways QA testers contribute to the organizations they work for:

• QA saves time and increases efficiency. QA testing throughout the development process can help you can identify issues early on. It can be much less complicated to fix bugs and other issues early in a product’s life cycle. It is also easier for developers to adjust code they have worked on recently.

• QA testers help protect brand reputation. QA testers use their skills to anticipate what might go wrong and prevent those things from happening. This saves a business from releasing a product that glitches, crashes when too many people use it at once, or otherwise provides a negative UX.

• QA testing makes it possible for products to grow safely. Scalability is important to QA testers. A key part of their role is to ensure added features won't compromise security or UX. With effective testing, you'll have a product that can be launched now and scaled later.

• QA is essential to product safety. QA testers not only ensure user expectations are met but also government and industry guidelines too. They follow specific procedures to test, document, evaluate, and report their findings.

A day in the life of a QA tester

QA testing is typically done in cycles throughout the product’s development. Your job as a tester involves several responsibilities. First, whether you're doing manual or automated testing, you’ll need to know how to plan to test, develop and execute test cases, and evaluate and document test results. Along with reviewing test procedures and developing scripts, you’ll research new technologies, tools, and testing procedures. Working closely with the product and development team and other stakeholders in QA processes, you'll ensure a product is of excellent quality and low risk.   

Job outlook for QA tester jobs

The QA tester has an important role with all industries developing products and providing services online. The US Bureau of Labor Statistics (BLS) predicts job growth of 17 percent between 2023 and 2033. This figure translates into about 327,900 new jobs [1].

How much do QA testers make?

The average salary for QA testers in the US is $82,000 [2]. The average base salary range is $56,000-$101,000, with an average additional yearly pay range of $5,000-$9,000. Additional pay may include commissions, profit sharing, or bonuses.

Alternate job titles and salaries for QA testers

Within the QA testing field, you can take on various job roles. Some, along with their expected annual salary, include: 

Note: All salary information below represents the average base salary and median reported additional pay from Glassdoor as of January 2025.

• QA automation tester: $116,000

• QA engineer: $110,000

• QA manual tester: $82,000

• Test manager: $159,000

• Test engineer: $128,000

• Test analyst: $115,000

• Test automation engineer: $126,000

What is QA testing?

There are seven different types of QA testing:

1. Unit testing

The QA tester often starts with unit testing, where you test individual software functions or unique testable product parts. By breaking up the testing into small, manageable parts, you can better identify what needs to be fixed. After you test individual units, you can move on to component testing, which connects many units of code.

2. Integration testing

Next, you’ll have to check that the various code components work together. QA testing combines different units of code and tests them concurrently. Developers need to do more work if they don’t work when integrated.

3. System testing

Also known as end-to-end testing, this testing stage looks at functionality more holistically. System testing aims to mimic what users experience with the product in real life. 

4. Performance testing

A small team works with the software or website when in development. Yet, when the asset launches to the world, it may have to handle hundreds of users at once. Performance testing confirms that the code can keep up. It compares performance on different user systems and puts the application under pressure to identify any bottlenecks or other concerns.

Looking to improve your QA resume with hands-on projects? Try Performance Testing with JMeter for absolute beginners, a two-hour Guided Project on Coursera.

5. Regression testing

In this stage, you check what happens to the product after changes are made. It’s making sure that fixing one problem doesn’t create new ones. 

6. User acceptance testing

Performed near the end of development, user acceptance testing (UAT) verifies the product or application does what its developers meant it to do, as expected.

7. Mobile testing

Acknowledging that many users are on mobile devices, this testing checks that the product or application can function on these devices. For example, mobile testing considers smaller screens, less memory, battery usage, and what happens if someone gets a call while in that app. 

How to become a QA tester

Sixty-six percent of QA testers have a bachelor's degree, 16 percent have a master's, and 10 percent have an associate degree [3]. Most commonly, they study computer science, business, computer applications, or information technology. You can also become a QA tester without a degree by meeting other employer qualifications, like industry certifications or hands-on experience.

Recommended degrees for QA testers

• Bachelor of Science in Computer Science from the University of London

• Bachelor of Information Technology from Illinois Tech

• Master of Information Technology from Illinois Tech

• Master of Science in Information Systems from Northeastern

Read more: What Is a Bachelor’s Degree? Requirements, Costs, and More

QA tester certifications

Even if you already have a degree, pursuing certifications for QA testers will help you expand your knowledge and prepare you for more advanced job opportunities. You can use the list below to identify certifications in your desired industry, area of expertise, and experience level.

For beginner QA testers (little to no experience with coding or testing):

• Google IT Automation with Python Professional Certificate

• Continuous Delivery & DevOps by the University of Virginia

• The International Software Testing Qualifications Board (ISTQB) offers several related certifications, including Certified Tester Foundation Level (CTFL), Test Analyst, Test Manager, AI Testing, Game Testing, Agile Tester, Strategic Test Management, and more.

For intermediate QA testers (those with some coding experience or a relevant two- to four-year degree):

• Software Testing and Automation Specialization by the University of Minnesota

• Certified Associate in Software Testing (CAST)

For advanced QA testers (those with a four-year degree or a two-year degree and a few years of experience)

• Certified Associate in Software Testing (CAST) for a foundational understanding of QA testing

• Certified Test Engineer (CSTE) to establish your competence in QA practices and principles

• Certified Software Quality Analyst (CSQA) to show you know bug database software and version control and different client and server architectures

• Certified Manager of Software Quality (CMSQ) demonstrates a professional level of competence in QA 

Read more: How To Write a QA Tester Resume: Layout, Design, Examples

Those with some knowledge of coding and software can benefit from this software testing automation course:

QA tester job requirements

QA testers are often analytical thinkers who can think flexibly and creatively. Your job is to discover errors and find bugs and glitches, so critical thinking is crucial. You’ll also need solid written and verbal communication skills so that you can efficiently track, troubleshoot, and report defects and errors. There are four main software testing models QA testers should be familiar with.

Read more: How to Write Test Cases: Types, Benefits, and Template

Software testing models for QA testers to know

The four main software testing models include:

• Waterfall: In the Waterfall model, the classic Software Development Life Cycle (SDLC) model, one phase is completed before the next. This lifecycle begins with a feasibility study. Requirement analysis and specification determination follow. Then, there’s design, coding, and unit testing, followed by integration and system testing. This model ends with maintenance.

• Iterative Development: A variation on the SDLC, the Iterative Development model, takes a more cyclical approach. The planning and requirement, analysis and design, implementation, testing, and evaluation stages are repeated over and over in an incremental fashion. This is thought to help improve the next iteration faster.

• Agile: Agile is a team-focused approach to QA that prioritizes customer value. This concept typically leverages the incremental, iterative approach. Everyone works in short sprints to adapt to changes in software development and collaborates to figure out the best strategies to meet the project goals.

• Extreme Programming: As a QA tester, you may work in an Extreme Programming environment. An iteration of Agile, this approach also stresses customer satisfaction. Instead of being driven by a deadline or pre-determined stages in a model, this QA testing model identifies ways to solve problems as efficiently as possible to get software to the user sooner. Testing starts as early as possible in an Extreme Programming model.

Read more: 9 QA Interview Questions + How To Answer Them

Take the next step in your QA tester career today

Learn to design, plan, evaluate, and execute test cases in as little as five hours with the University of Leeds' online course, Foundations of Software Testing and Validation.

Gain hands-on experience with API testing through the two-hour Guided Project, API Testing Using Rest Assured Test Automation Tool on Coursera. This beginner-friendly project walks you through sending HTTP requests and understanding API testing using the Rest Assured tool.