Senior .NET/C# Developer

Description

**Job Description** **Job Mission** Participate in the development, evolution, and maintenance of corporate applications based on Microsoft technologies, contributing to the continuous improvement of existing products and the design of new features. This position requires experience in desktop applications, integration with external services, process automation, and development of secure and robust solutions. **Key Responsibilities** * Develop and maintain applications using .NET and C\# technologies. * Participate in the evolution and modernization of existing applications, including legacy code refactoring tasks. * Design and implement integrations with REST APIs and external services. * Develop automation solutions and programmatic interaction with applications and web portals. * Ensure application security through proper use of digital certificates, authentication mechanisms, and credential management. * Collaborate in incident resolution, performance optimization, and software quality improvement. * Apply best practices in development, traceability, auditing, and event logging. **Essential Requirements** * Solid experience of over 10 years developing with **.NET and C\#**. * Experience in desktop application development with **WPF**. * Experience in evolutionary maintenance of existing applications and legacy code refactoring. * Experience in automating navigation, web scraping, or programmatic web interaction. * Strong knowledge of applied security, credential management, digital certificates, authentication, and traceability. * Experience in developing and integrating **REST APIs** and applications based on **.NET Core**. * Experience working with digital certificates, electronic signatures, PKI, Windows certificate store, applied cryptography, or integrations with certification providers. **Especially Valued** * Experience in automating electronic offices or public agency portals. * Knowledge of anti-automation mechanisms, resilience against front-end changes, and scraper resilience strategies. * Experience with applications requiring **auditing, detailed logging, and traceability**. **Competencies** * Analytical ability and orientation toward solving complex problems. * Autonomy and proactivity. * Quality- and detail-oriented mindset. * Ability to work collaboratively and share knowledge. * Commitment to best practices in development and security. **Employment Details:** * Join a high-level technical team specialized in developing and maintaining corporate software solutions. * Join a high-level technical team specialized in developing and maintaining corporate software solutions. * Participation in strategic projects with a strong technological component and integration with external agencies and services. * Madrid, Spain * Indefinite-term contract * 5–10 years of experience * Vocational Training (FP) * 42,000 \- 48,000 * Spanish () * 0 ()