.NET Senior / Tech Lead Developer

Description

Job Summary: We are seeking a Senior Backend .NET Developer / Tech Lead to participate in a stable project, developing with C# and .NET, and designing APIs and microservices. Key Highlights: 1. Stable technology project focused on C# and .NET 2. API and microservices design, and sound architectural practices 3. Experience with automated testing and CI/CD pipelines DESCRIPTION We are looking to hire a **Senior Backend .NET Developer / Tech Lead** to join a stable technology project focused on backend development using **C\# and .NET**, API and microservice design, and sound software architecture practices. Selected candidates will work in a hybrid mode, with **two days per week onsite at the client's offices in Madrid, Alameda de Osuna area**. **Immediate availability to start** is mandatory. REQUIREMENTS * Backend development in C\# (.NET). * Advanced use of ASP.NET Core, an open\-source web development framework \| .NET Core and ASP.NET Core, an open\-source web development framework \| .NET Framework, especially in MVC and Web API-based architectures. * Design and implementation of REST APIs, SOAP web services, and microservice architectures. * Data management using relational databases (SQL Server, PostgreSQL) and non-relational databases (MongoDB, Redis or equivalent technologies). * Regular use of data interchange formats such as JSON and XML. * Consistent application of development best practices, including SOLID principles, Domain Driven Design (DDD), and code quality standards. * Experience in automated testing, continuous integration, and version control using Git and CI/CD pipelines.