SENIOR ADMIN & . NET DEVELOPER

Who we are

Tecnicas Reunidas (TR) is a leading international engineering and construction company in the energy sector, with more than 65 years of experience and over 13,000 professionals worldwide. We have our headquarters in Madrid, offices in Bilbao and Cartagena, and engineering centers in India, Abu Dhabi, Saudi Arabia, Turkey, and Chile, among others, offering career opportunities in an international environment. Our commitment to people has been recognized with the Top Employer certification in Spain and India.

Global projects and the energy of the future

At TR, we develop projects in Oil & Gas and Power, and we are advancing toward the energy of the future through hydrogen, clean fuels, and carbon capture projects, integrating digitalization, AI, and robotics. Our high level of professionalism and commitment drives continuous research to improve efficiency and sustainability, always in strict compliance with the law and aligned with the highest ethical standards.

Main responsibilities

• Design, develop, and maintain enterprise and industrial applications using C# and .NET Core, applying Domain-Driven Design and clean architecture principles.
• Implement RESTful APIs using ASP.NET Core and complementary services developed with FastAPI.
• Build modular and maintainable application layers using Repository and Unit of Work patterns.
• Develop interactive and scalable front-end interfaces using Blazor and modern web standards (JavaScript, HTML5 where applicable).
• Administer and optimize Azure cloud services (App Services, Azure SQL, Storage, Key Vault, Monitor), ensuring industrial-grade reliability.
• Implement CI/CD pipelines using Git and Azure DevOps, ensuring safe, auditable, and controlled deployments for regulated industrial environments.
• Design, manage, and optimize SQL Server / Azure SQL databases; perform tuning and maintain high-availability strategies.
• Collaborate closely with operations, engineering, cybersecurity, and infrastructure teams to ensure system continuity and alignment with industrial standards.
• Ensure secure coding practices, identity and access management, and proper secrets governance.
• Monitor production systems, support incident resolution, and execute root-cause analyses.
• Produce high-quality documentation, architectural diagrams, and operational guidelines.

Required profile and experience

• 5+ years of experience in .NET development and system/cloud administration.
• Strong proficiency in C#, .NET Core, and ASP.NET Core Web APIs.
• Deep understanding and practical application of Domain-Driven Design (DDD), SOLID principles, repository and Unit of Work patterns.
• Extensive experience with Microsoft Azure services in production environments.
• Hands-on experience with API development using FastAPI.
• Strong knowledge of SQL Server / Azure SQL, T-SQL, and performance tuning.
• Practical experience with Git and DevOps practices (CI/CD, pipelines, automated deployments).
• Front-end development experience using Blazor.

What we offer

• Health and well-being programs (physical and emotional)
• 5+1 Health insurance, discounts and access to Wellhub
• Study grants, continuous training, and professional development
• Workplace adaptation for individuals with a Disability Certificate ≥ 33%

Diversity and equality

At Tecnicas Reunidas, we have a strong commitment to equal opportunities for women and men, as well as to diversity. To this end, we carry out rigorous recruitment processes that ensure these principles.