Senior .NET Developer with WinForms

Senior .NET Developer with WinForms Miejsce pracy: Warszawa Technologies we use Expected .NET Core About the project We are looking for experienced .NET Developer with WinForms. Your responsibilities Lead the design, development, and migration of complex .NET/C# applications with a strong focus on WinForms architecture, Entity Framework, and database optimization to ensure high performance and scalability. Apply and promote Domain-Driven Design (DDD) and CQRS principles within production systems, providing technical leadership and mentoring to development teams. Architect and implement secure, scalable Web APIs (REST), leveraging deep expertise in asynchronous programming, multithreading, and performance tuning. Manage the full software development lifecycle by enforcing best practices including SOLID principles, clean code standards, unit testing, and continuous integration/delivery workflows. Collaborate closely with stakeholders, organize workstreams, estimate tasks, and lead client communications to deliver high-quality solutions on schedule. Our requirements 6 years of experience with .NET/C# across various projects Deep knowledge of WinForms (including architecture and migrations) Expert in Entity Framework, database design, and query optimization Strong expertise in multithreading and application performance Proven leadership in applying DDD and CQRS principles in production systems Good understanding of multithreading, async/await, and Task Parallel Library Architect-level understanding of Web API design (REST, security, scalability) Solid understanding of software development principles, design patterns, unit testing, and best practices (SOLID, Clean code). Proficiency in English at a C1 level or higher Familiarity with Git, CI/CD workflows, and unit testing frameworks (e.g., xUnit, NUnit) This is how we work on a project Continuous Deployment Continuous Integration documentation issue tracking tools testing environments What we offer Stable employment. International projects for Global Fortune 500 companies. Indefinite period contract. 100% remote work. You can choose to work from any place in the world Flexibility regarding working hours. Autonomy to choose the way you work. We trust you. Annual Training&Development Budget, upskilling support, capability development programs Cooperation with top-tier engineers and experts. Unique TEAL culture, relationship- and respect-driven community, non-corporate atmosphere Agile approach and no bureaucracy Outstanding integration trips to various places in Europe for all employees. Activities to support your well-being and health. Luxmed Gold Extended medical care and Multisport Plus benefit. Benefits sharing the costs of sports activities private medical care sharing the costs of professional training & courses remote work opportunities flexible working time integration events YOUR ITEAMS sp. z o.o. Our business philosophy had been clarifying for a good few years, during which we gained experience in large and influential corporations. Based on well-established knowledge and best practices, we decided to build a Teal organisation in which we can fully: •realize our mutual passion for IT, •professionally support our clients in this area, •use the best standards born from our experience, •have fun creating a harmonious community, •stay true to our values and treat every person with respect, •say goodbye to hierarchical treatment and lack of empowerment, •have a smile on our lips when we think about the next Monday, Wyrażam zgodę na przetwarzanie przez Your ITeams Sp. z o.o. danych osobowych zawartych w moich dokumentach aplikacyjnych oraz partnerów współpracujących z Your ITeams Sp. z o.o. w celu weryfikacji mojej kandydatury na potrzeby realizacji procesu rekrutacyjnego.Pełna informacja o przetwarzaniu danych osobowych:https://youriteams.com/polityka-prywatnosci/