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What Is SDET??? Know The Difference Between Tester And SDET

This blog covers all aspects of being an SDET (Software Development Engineer in Test), such as skillset, roles and responsibilities, and difference between tester and SDET:

Software Development Engineer in Test (SDET) is the abbreviation for this term.

In the simplest terms possible, this position combines elements of both pure developer and pure testing roles. SDETs are qualified experts in both software development and quality engineering.

The knowledge of SDET professionals is completely concentrated on the testability, performance, and durability of the software testing and development process. They are also capable of participating in the design process for production software as a contributor or reviewer. Additionally, creating and running the test cases manually or automatically. Programming languages like Java, Python, C#, and many others are used while automating processes. Have a strong command of many programming languages and have a solid understanding of object-oriented programming as a result.

Together with other automation technologies like Selenium, TestNG, JUnit, Rest-Assured library, and many others, combine their coding expertise. Additionally, developing automation utilizing other tools like Jenkins, Git, Postman, and Cucumber to boost test coverage and shorten testing times. The primary goals of the function were to increase efficiency and dependability for the apps being tested by automating some human repetitious procedures.

Difference between SDET and Tester?



Manual Tester

System Knowledge

Every stage of the software development process, including design, development, and testing, involves SDET.

Only the testing life cycle of the software development process involves quality assurance (QA).

Framework /Tool Knowledge

SDET can contribute to the creation of test automation tools, possibly for general use.

Not required to create test automation frameworks or tools

Testing Scope

Focuses on a broad range of testing methods and approaches. For e.g. Functional, Non-Functional, Security, Performance

Generally, concentrate on the application being tested from the standpoint of functionality.

Skills Required

SDETs are generally in charge of automating test cases and creating reusable scripts and tools that assist the team in minimizing repetitive work.

Manual testers concentrate on complicated test cases, edge-case scenarios, and app functionality in particular.


SDETs are required to carry out tasks like automated test data generation and performance testing, among others.

The tester will only handle tasks that are connected to testing.

Requirement analysis

Understand the specifications and guidelines for the product

No such a knowledge expected from manual tester

Need of SDET :

Today's firms have made significant changes to their operational procedures. They desire fewer employees to do more work. The position of Software Development Engineer in Test (SDET) comes into play when it comes to multifaceted skills with a single person. Because they are the only professionals that can both manage testing of the software that has been built and participate in its development. Software Development Engineer in Test (SDET) supports both methods of creating high-performance code and designing the testing framework because of this.

Software developers for SDET are therefore in high demand. The following fields have the highest need for Software Developer Engineers in Tests (SDETs):

Figure : Need of SDET

Following are some essential Non-Technical Skills

  • Communication skill

  • Time Management & Organization Skills

  • Positive Attitude

  • Passion

  • Prioritization

  • Team Work

Following are some essential Technical Skills:

  • Designing Skills

  • Programming Skills

  • Exposure of Behavior-Driven Development (BDD)

  • Testing Methodologies

  • Agile + DevOps Exposure

Roles and Responsibility of SDET :

  • Using a team of software developers to create software applications.

  • Setting up frameworks and performing test automation across several application platforms, including desktop, mobile, and web.

  • Establishing and managing bug reports, as well as team communication.

  • Creating various acceptance tests and test scenarios.

  • Work with the deployment teams to address any system level concerns.

  • Establishing, running, and maintaining frameworks for test automation.

Hope this article gives you in-depth information about what an SDET is, including their tasks and responsibilities, necessary abilities, the distinction between them and manual testers.

In general, SDETs are in high demand and are highly regarded in their teams at nearly all good product firms.

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