QA Engineer

We are the company that stands behind the spectacular success of CKEditor, 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 GitHub repository.

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 person who will join our QA team to help us to keep the quality of our products at the highest level. The perfect candidate would have a mix of soft and technical skills and be open-minded, patient, and creative.

As a QA team member, you will be responsible for the quality of products with a primary focus on the CKEditor AI project.

You’ll have strong support from experienced 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:

• ensuring seamless integration between front-end and back-end layers of various products

• validating AI-driven features, including prompt-based flows, generated content, and non-deterministic behavior;

• performing manual, exploratory, and regression testing with a strong focus on edge cases and real-world usage;

• testing REST APIs and verifying data flow between services;

• collaborating closely with front-end and back-end engineers on quality risks and feature design;

• contributing to and maintaining automated tests and internal tooling using JavaScript and modern E2E frameworks (e.g. Cypress, Playwright);

• reporting and verifying issues with clear technical context and impact.

  
  

To be successful in this role you need the following:

• 2+ years of experience as a QA Engineer;

• solid practical knowledge of JavaScript foundations (required);

• practical understanding of AI-based systems, gained through commercial, personal or non-commercial projects;

• good understanding of how web applications work (front-end, back-end, APIs);

• hands-on experience with automated testing using modern E2E frameworks (e.g. Cypress, Playwright)

• a product-oriented mindset and ability to think in terms of risk and user impact;

• curiosity, critical thinking, and readiness to ask questions;

• good English communication skills (B2+).

  
  

Nice to have:

• experience testing AI-driven features in production environments;

• projects portfolio on GitHub;

• experience with Docker;

• experience with Node.js;

• experience with AWS;

• knowledge of web security and common vulnerabilities (OWASP Top 10)

  
  

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 10.500 - 16.000 PLN + VAT

• 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;