Full Stack Developer .NET React 24/7 Support

Work mode: 100% remote B2B: up to 1160 PLN/MD net Start: ASAP (notice period up to 30 days) Project length: long-term cooperation About the project You will join an international team responsible for the development and maintenance of modern applications supporting key business processes. The project combines the development of new functionalities with ensuring the stable operation of production environments available to users 24/7. We are looking for someone who excels in creating high-quality software as well as solving complex production problems. You will have a real impact on the development of applications operating in a cloud environment, collaborating with technical and business teams from various locations. Technologies used in the project: .NET 6+ | C# | ASP.NET Core | React | TypeScript | Azure SQL | Cosmos DB | Azure Services | Azure DevOps | REST API | Docker | Git Scope of responsibilities Development and maintenance of web applications based on .NET and React technologies. Design and implementation of new functionalities according to business requirements. Providing support for production environments operating in a 24/7 model. Analysis, diagnosis, and resolution of incidents and application problems. Handling L2/L3/L4 support tickets for business-critical systems. Collaboration with development, QA, DevOps teams, and business stakeholders. Creation and development of REST APIs and components based on microservices architecture. Participation in root cause analysis of errors and activities to improve system stability. Supporting automation processes, monitoring, and continuous improvement of software quality. Participation in on-call duties, including night hours, weekends, and holidays. Requirements Minimum 4 years of commercial experience in .NET programming technologies. Experience in maintaining and supporting business applications operating in a production environment. Very good knowledge of C#, .NET Framework, .NET Core / .NET 6+, and ASP.NET MVC and Web API. Practical experience with React, TypeScript, JavaScript (ES6+), HTML5, and CSS3. Experience in creating and maintaining REST APIs and microservices-based solutions. Knowledge of Azure SQL databases and data integration issues. Experience with Microsoft Azure services, Azure DevOps, and CI/CD processes. Ability to diagnose production problems using monitoring tools. Knowledge of Git and code repository management tools. Experience with Docker and containerization solutions. Readiness to work in a production support model and participate in on-call duties. Very good knowledge of English (minimum B2). Nice to have Experience with Azure Functions and Logic Apps. Knowledge of cloud-native environments and distributed systems. ITIL certification or experience in organizations working according to this standard. Experience in Agile/Scrum methodologies. Knowledge of tools and practices related to observability, monitoring, and application diagnostics. Experience in projects carried out in an international environment.