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Senior .NET / SQL Developer (F/M/D) Miejsce pracy: Gliwice Recruitment for Our Client is an international technology center responsible for delivering modern IT infrastructure for the Group’s internal needs. The organization develops scalable, secure and high-performance solutions, enabling rapid deployments and cost optimization through the use of cloud technologies. Your responsibilities Developing and implementing new features in web applications. Participating in the full software development lifecycle: analysis, design and implementation. Maintaining and refactoring existing (legacy) codebases. Writing and optimizing advanced T-SQL queries and stored procedures. Performing performance tuning and working with large, complex databases. Collaborating closely with other developers and technical teams. Employer requirements At least 5 years of professional experience as a developer. Very strong SQL Server skills, including T-SQL and performance optimization. Experience with .NET / C# or strong motivation to further develop in this area. Hands-on experience with web applications. Analytical, solution-oriented mindset and strong communication skills. English proficiency at B2 level or higher and openness to an international environment. What employer offers Work on modern, scalable cloud-based solutions. Real influence on system architecture and technical decisions. Flexible hybrid working model (50/50). Competitive salary aligned with your experience. Employment based on an employment contract (UoP). Comprehensive benefits package and co-financing of training and professional courses. Employment based on an employment contract (UoP). A comprehensive non-wage benefits package. Benefits sharing the costs of sports activities private medical care sharing the costs of professional training & courses life insurance remote work opportunities flexible working time integration events coffee / tea drinks parking space for employees leisure zone extra social benefits employee referral program