Software Quality Assurance Engineer (Manual)

At Sybilla Technologies, we are on a mission to let the world see what happens in space — clearly, reliably, and on time. We build systems, software, and services that safeguard the future of global space operations. Sybilla has grown from a small startup into a recognized European space-tech company, working across Space Traffic Management, Space Surveillance & Tracking, and Space Operations. Our technologies support governments, defense organizations, space operators, and other customers to understand orbital events and make informed decisions. The company is a growing international team of astrophysicists, engineers, software developers, analysts, and project managers across Europe and beyond.

• 3+ years of hands-on experience in manual software testing.
• Practical knowledge of software test design and testing methodologies.
• Hands-on experience testing REST APIs, preferably with Postman or Bruno.
• Good understanding of HTTP methods, status codes, and request/response structures.
• Practical SQL skills, preferably with PostgreSQL.
• Proficiency with browser DevTools.
• Experience with Azure Test Plans or similar test management tools.
• Strong skills in defect reporting and tracking, with clarity and reproducibility.
• Experience working in a fast-paced startup or similarly dynamic environment.
• Good command of Polish and English, allowing communication across teams and work with technical documentation.
• A professional, proactive, and independent approach to work.
• Strong commitment to quality and open communication/reporting of issues.

Nice to have:

• Experience testing non-LLM machine learning models.
• Hands-on experience running local ML inference.
• Knowledge of SDLC and Agile methodologies.
• Bachelor's degree or higher.
• Basic knowledge of security testing, e.g., Burp Suite or similar tools.
• Basic scripting skills in Python, C#, or PowerShell.
• Previous experience working with software or technologies related to space, astronomy, or other technically complex domains.

• Own the functional quality of assigned features and releases.
• Analyse business requirements and translate them into structured test cases and test scenarios.
• Design, maintain, and execute manual tests using Azure Test Plans or similar tools.
• Identify, document, and track defects in ClickUp, providing clear, reproducible bug reports.
• Validate REST APIs using tools such as Postman or Bruno, including requests, responses, HTTP methods, and status codes.
• Validate data integrity and end-to-end data flows using PostgreSQL/SQL queries.
• Use browser DevTools to investigate issues and support troubleshooting.
• Verify fixes and perform regression testing to ensure changes do not introduce new issues.
• Maintain test plans, test cases, and other QA documentation.
• Work closely with Product and Development teams to clarify requirements, communicate risks, and improve product quality.
• Contribute to the continuous improvement of QA processes, testing practices, and team ways of working.
• Where applicable, support QA activities related to non-LLM machine learning models, including local inference runs, data validation, output consistency, and awareness of model drift.