QA engineer (manual) for web products

CoreStar is a dynamic technology company supporting partners in heavy-load industries with high-performance solutions. Our expert teams bring a startup-driven mindset, focusing on innovation, collaboration, and efficiency in every project. At CoreStar, you’ll have the opportunity to grow your skills, tackle exciting challenges, and directly contribute to impactful products. We're looking for a QA Engineer to take ownership of quality across our web products — both the sites already live and the ones we're preparing to launch.

• An owner, not a ticket-taker — you treat product quality as yours. You ask why a feature exists and who it's for, you raise risks early instead of reporting them after release
• Risk- and priority-driven — you can explain why you tested this deeply and that lightly. You know the difference between "we found no bugs" and "we covered the risk"
• Deliberate about test types — you know which technique fits which situation, and you don't reach for a full regression pass when an exploratory charter would answer the question faster
• A clear communicator — you write precisely enough that a remote colleague can act on your report without a follow-up call
• Diplomatic, but delivery-driven — you navigate differing opinions across dev, design and business teams with tact, while keeping everyone focused on the release date
• Positive and resilient — constructive and solution-oriented under release pressure
• 3+ years in manual QA of web products, including sites running in production with real users
• Solid knowledge of QA fundamentals: testing processes, methodologies, test documentation, client-server architecture
• Functional and non-functional testing: cross-browser and cross-device compatibility, responsive layout, perceived performance, basic accessibility, usability, and security hygiene (input handling, authorization, exposed data)
• L10n and i18n testing
• API and browser-level testing: REST API testing with Postman / Swagger, confident use of DevTools (network, console, storage, device emulation)
• Testing across the release lifecycle: both hardening a new site for launch and verifying changes safely on a live product (smoke on production, post-release verification, regression scope for hotfixes)
• Monitoring and logging systems — Grafana, Coralogix or equivalents; able to use logs and dashboards to investigate an issue rather than only reproduce it
• English B1 +

• 24 working days of paid annual leave
• 6 days of paid sick leave
• Official employment
• Medical insurance
• Coffee zone with fruit & snacks available in the office
• Corporate Lunch provided by the company
• Gym and sports classes
• Healthy and friendly work atmosphere
• Greek and English language classes (partially covered)