QA Engineer

Location: [Poland] We Are: RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel We are a growing engineering team responsible for developing and maintaining self-service platforms for managing advertising campaigns with advanced reporting and forecasting capabilities — used by both internal and external users. As a QA Engineer, you will play a crucial role in ensuring the quality and reliability of our solutions. This role involves both test automation and manual testing in roughly equal proportion. You will write automated regression tests, but also perform hands-on exploratory and manual testing of new features. We believe the best QA engineers understand both sides — the precision of automated tests and the intuition behind exploratory manual testing. If you enjoy working across the full quality spectrum, this role is for you. Our QA team is lean and growing, which means you'll have a real voice in shaping our testing processes, tools, and standards. We value initiative and ownership — you won't just execute predefined test cases, you'll help define how quality is built into our software development lifecycle. Tech stack Python + FastAPI/Django · TypeScript + React · Kubernetes · Google Cloud Platform · PostgreSQL · AlloyDB · BigQuery You Will: Perform manual and exploratory testing of newly developed features (frontend and backend) Design, develop, and maintain automated regression tests using Python, TypeScript, Cypress Contribute to the evolution of our test automation framework and testing processes Collaborate closely with developers, UX/UI designers, and product stakeholders to ensure quality of our software products Participate in test planning, test case design, and defect management Requirements: Must have At least 3 years of experience in a QA role with hands-on test creation and execution Experience in at least 2 different companies/organizations (diverse project exposure) Solid understanding of software QA methodologies and processes Hands-on experience with test automation for frontend applications Willingness to split time between automation and manual testing Technical skills: Python, pytest, API testing, Git, Linux basics Languages: English (B2+), Polish (B2+) Nice to have Experience organizing or owning a QA process in a team Experience working in flexible, self-organizing teams Performance testing CI/CD pipelines and cloud infrastructure (GCP, Docker, Kubernetes) GraphQL, SQL UX-oriented mindset — thinking beyond "does it work?" toward "is this what customers will love?" Why join us 100% remote — collaboration from anywhere in Poland or from our offices in Warsaw or Kraków Flexible collaboration model — we trust you to manage your time Shape the QA process — with a small QA team, you'll have a direct impact on how testing is done Influence the product — we work closely with users, developers, and UX designers; your voice matters in the final shape of what we ship Freedom in tooling — we're open to adopting better tools and technologies when there's a good case for it Stable tech company — RTB House is an AI/ML-driven product company with a long-term perspective, not a code factory AI-powered workflow — access to tools like GitHub Copilot, ChatGPT, Gemini to boost your productivity Training budget — for professional development and foreign language courses Team events — regular team meetups and integration activities Apply now! You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it. ... (truncated, view full listing at source)