Junior QA Engineer with JavaScript

We are the company that stands behind the spectacular success of , used by millions of people around the world. At CKSource we produce software components that other developers use to build their applications (WYSIWYG editor, file manager, document converters, etc.). Our flagship product is CKEditor 5 – an open-source, modern TypeScript rich text editor with custom data model and virtual DOM – check our .

We are part of Tiugo Technologies, a launchpad for new developer platforms, helping software companies accelerate growth, increase operating efficiency, and scale their business. Tiugo contains a suite of brands that are API-first, market-leading developer platforms focused on content creation and digital collaboration. Tiugo’s current family of brands includes CKEditor, TinyMCE, ButterCMS, and Uploadcare.

Together our products have powered millions of software applications and websites. Enabling content and communication in everything from Microsoft to NASA, you might not know our name, but you’ve probably used our software.

Your New Role:

As part of a portfolio of best-in-class developer tools, we are looking for a Junior QA Engineer who will join our QA team to help us keep the quality of our products at the highest level and work on automation supporting our day-to-day processes. We are looking for highly motivated individuals who are passionate about web technologies and have hands-on experience with creating web applications, both front-end and back-end. We don’t expect you to have commercial experience, but you should have been working on hobby projects; having projects to show off will be enough. If you’re a self-learner who isn't afraid to dive into technical challenges and learn by doing, this is the perfect place for you.

As a QA team member, you will be responsible for the quality of products within the Cloud Services project and our crucial customer-facing platform - Customer Portal. We guarantee support from our QA Engineers who will introduce you to projects and help you during your onboarding. We know how important the first days in a new job are, so we will make sure that you will have time to learn about our products and how we work

Key Responsibilities:

• manual testing of our products;

• API testing;

• stress testing and regression testing;

• creating test automation and automation scripts;

• reporting and verifying issues in our issue trackers;

• supporting developers in customers’ technical support;

• communicating with the development team;

• improving your technical and soft skills.

To be successful in this role you need the following:

• hobby-projects portfolio on GitHub in HTML / CSS / JS stack; we are looking for people who have practical experience with the code and understand how application work;

• practical JavaScript skills - comfortable with async code, working with clients, and reading & adapting existing code;

• solid understanding of how modern web apps work - SPA, REST APIs, JWT, WebSockets;

• educational background in Computer Science or another technical field will be considered a strong advantage;

• experience in leveraging AI-powered tools (e.g., ChatGPT, Claude Code, Gemini);

• love testing and breaking stuff :)

• curiosity and critical thinking - you ask questions, dig into problems, and don't stop at "it works on my machine";

• fluent command of Polish and a good working proficiency in English (at least B2+ level);

Nice to have:

• experience with AWS or other cloud platforms;

• basic experience writing E2E tests in modern frameworks (Cypress or Playwright);

• basic experience with API testing - comfortable with tools like Postman/Bruno/Insomnia, reading API documentation (OpenAPI/Swagger), and writing scripted API tests;

• basic knowledge of Docker and Node.js - you can run a service locally and debug a containerized environment;

• familiarity with CI/CD pipelines (GitHub Actions, CircleCI, etc.);

JavaScript knowledge?

Yes, it is not a mistake :)

Because we create web components, our clients are not only end-users but also developers who integrate those with their websites. This is why we care that you are able to check the proper software operation from the point of view of both these groups.

Why join CKSource:

Our people are a huge part of what makes CKSource a great place to work! Aside from a great team, some of our benefits include:

• B2B contract-based monthly remuneration is 7.000 - 10.500 PLN + VAT (or equivalent for Umowa o Pracę / Umowa Zlecenie);

• quarterly and annual financial bonuses depending on the company’s performance;

• flexible schedule and the possibility to work fully remotely;

• professional development resources (up to 5 days of additional leave and 6 000 PLN yearly);

• LinkedIn Learning access;

• extra leave for Tiugo Day - our company’s foundation day and your birthday;

• English lessons with a native speaker and an online language platform where you can learn English, Spanish, and German;

• access to a mental health and well-being platform with 24/7 dedicated psychological support;

• private medical care (Enel Med or Medicover) and Multisport card;

• 2 weeks of paid parental leave for our contractors.

What is next:

• a Zoom call with HR team to get to know each other better;

• technical screening with Kacper Tomporowski (our Engineering Manager) and Mikołaj Sawicki (our QA Team Leader);

• technical part with a task to be completed live on a call.