Senior Full-Stack Software Engineer (.NET/Desktop/Web)

Tech stack:. NET Framework 4, WinForms / WPF, C#, ADO. NETJavaScript, HTML, CSS, ReactSQL Server, PL-SQLAzureRequirements: Bachelor’s degree in Computer Science, Software Engineering, or a related technical field is a plus4–5 years of commercial experience as a Software EngineerStrong knowledge of C# and the . NET platform (. NET 4, . NET Framework, . NET Core)Experience in developing and maintaining desktop applications (WinForms and/or WPF)Good knowledge of JavaScript and web technologies (HTML, CSS)Experience working with React or another modern front-end frameworkGood knowledge of SQL and relational databases (SQL Server, Azure SQL)Experience with Microsoft Azure or other cloud solutionsExperience working in Scrum/Agile environmentsKnowledge of version control systems (Git)Ability to write clean, maintainable, and well-structured codeStrong analytical and problem-solving skillsAbility to communicate effectively and collaborate with both technical and business stakeholdersEnglish proficiency at a minimum B1/B2 levelPolish proficiency at a minimum B2 levelNice to have: Experience working with Azure DevOps and CI/CD processesKnowledge of TypeScriptExperience in modernizing desktop applications and migrating solutions to web-based environmentsUnderstanding of software design principles, patterns, and best practicesExperience in writing unit, integration, and automated testsKnowledge of application security principles and data protection regulations (GDPR)Experience working with ERP, HR, or payroll systemsKnowledge of technologies and tools such as Entity Framework, SignalR, REST API, Web API, and microservices architectureExperience integrating with third-party systems and various types of APIsKnowledge of the MVVM pattern and best practices for developing WPF desktop applicationsExperienced in using AI tools in day-to-day workflowProject description: We are looking for an experienced and motivated Full-Stack Software Engineer who is passionate about Microsoft technologies and relational SQL databases. You will join a team responsible for developing and maintaining business applications that support HR processes for a leading provider of ERP and HR solutions in the Polish market. As a Full-Stack Software Engineer, you will be primarily responsible for the development, maintenance, and modernization of desktop applications built on the . NET platform (WinForms/WPF). As our product evolves, you may also contribute to web-based interfaces using JavaScript and React, though this is expected to represent a smaller part of the role, at least in the near term. You will also leverage your SQL expertise to design, optimize, and maintain data models and database queries. In this role, you will collaborate closely with Product Owners, designers, and fellow engineers to deliver high-quality solutions that address real business needs. This is an opportunity to make a tangible impact on product development, contribute to technical decision-making, and further grow your skills in a modern and collaborative engineering environment.