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

Tech stack: .NET Framework 4, WinForms / WPF, C#, ADO.NET JavaScript, HTML, CSS, React SQL Server, PL-SQL Azure Project 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. About Spyrosoft Spyrosoft is an authentic, cutting-edge software engineering company, established in 2016. In 2021 and 2022, we were among the fastest growing technology companies in Europe, according to the Financial Times. We were founded by a group of tech experts with established backgrounds in software engineering, who created an ‘engineer-to-engineer’ workplace, powered by enthusiasm, fairness and authentic relationships. Having a unique offering, which bridge the gap between technology and business, we specialise in technology solutions for industry 4.0, automotive, geospatial, healthcare & life sciences, employee experience & education and financial services industries.

Requirements

Bachelor’s degree in Computer Science, Software Engineering, or a related technical field is a plus 4–5 years of commercial experience as a Software Engineer Strong 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 framework Good knowledge of SQL and relational databases (SQL Server, Azure SQL) Experience with Microsoft Azure or other cloud solutions Experience working in Scrum/Agile environments Knowledge of version control systems (Git) Ability to write clean, maintainable, and well-structured code Strong analytical and problem-solving skills Ability to communicate effectively and collaborate with both technical and business stakeholders English proficiency at a minimum B1/B2 level Polish proficiency at a minimum B2 level Nice to have: Experience working with Azure DevOps and CI/CD processes Knowledge of TypeScript Experience in modernizing desktop applications and migrating solutions to web-based environments Understanding of software design principles, patterns, and best practices Experience in writing unit, integration, and automated tests Knowledge of application security principles and data protection regulations (GDPR) Experience working with ERP, HR, or payroll systems Knowledge of technologies and tools such as Entity Framework, SignalR, REST API, Web API, and microservices architecture Experience integrating with third-party systems and various types of APIs Knowledge of the MVVM pattern and best practices for developing WPF desktop applications Experienced in using AI tools in day-to-day workflow

Must have: .NET, WinForms, JavaScript, Web technologies, React, SQL Server, Relational database, Azure, Cloud, Version control system

Nice to have: C#, .NET Framework, Azure DevOps, Security, ERP, Entity Framework, SignalR, REST API, API, Microservices architecture, MVVM, WPF, AI