Backend QA Engineer

Ignite quality assurance excellence — elevate backend systems to new standards! Kraków-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Backend QA Engineer, you will be working for our client, a global leader in delivering innovative backend solutions. You will play a pivotal role in ensuring the robustness, reliability, and security of backend services and APIs built on .NET and SQL, contributing directly to the seamless operation and trustworthiness of their digital platforms. This is an exciting opportunity to impact mission-critical systems and advance your career within a dynamic, international environment. Your main responsibilities: • Design, develop, and execute comprehensive test cases for backend services, APIs, and databases. • Perform integration, regression, and system testing on .NET backend applications. • Validate data integrity and business logic within SQL databases, including stored procedures and complex queries. • Test and validate RESTful APIs using tools such as Postman or Swagger. • Analyze system requirements and craft effective test strategies to ensure full coverage. • Identify, document, and track defects, collaborating closely with developers to facilitate rapid resolution. • Contribute to the continuous improvement of QA processes and best practices. • Support CI/CD pipelines by integrating automated tests and assisting ongoing deployment activities. You're ideal for this role if you have: • At least 5 years of experience as a Software Tester or QA Engineer, preferably focused on backend or API testing. • Strong hands-on experience testing .NET backend code and services. • 2+ years of practical API testing and validation experience. • Proficiency in SQL, including the ability to craft and execute complex queries and test stored procedures. • Solid understanding of CI/CD pipelines and experience with tools like Jenkins or Azure DevOps. • Knowledge of software engineering best practices, including SOLID principles, TDD, and data validation. • Experience analyzing logs and debugging backend issues. It is a strong plus if you have: (optional)• Experience with performance and load testing tools such as JMeter or k6. • Knowledge of microservices architecture and cloud platforms like Azure. • Understanding of security testing for backend services. Language Required for the role: • Fluency in English (good command). We offer you: ITDS Business Consultants is involved in various, innovative, and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people. The offer includes: • Stable and long-term cooperation with very good conditions • Enhance your skills and develop your expertise in the financial industry • Work on the most strategic projects available in the market • Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years • Participation in Social Events, training, and work in an international environment • Access to an attractive Medical Package • Access to Multisport Program #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.