> Markdown version of [/jobs/ext/2201557-developer](https://www.wearedevelopers.com/jobs/ext/2201557-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Developer - **Company:** Mjølner Informatics - **Location:** Madrid, Spain - **Contract:** Permanent contract - **Skills:** .NET Framework, Artificial Intelligence, Amazon Web Services, Microsoft Azure, C Sharp (Programming Language), Relational Databases, Software Design Patterns, Microsoft SQL Server, Software Architecture, Query Optimization, Software Systems, Cloud Platform System, Containerization, Kubernetes, Restful APIs, Terraform, Microservices - **Published:** August 23, 2026 - **Apply:** https://www.jobleads.com/es/job/e177a938082f88b00cbc29d9e2a1579a8 ## About the Role * University degree in Computer Science, Software Engineering, or a related field (or equivalent professional experience) * Minimum 5 years of experience as a .NET developer, with solid expertise in C# and the .NET ecosystem * Experience with backend architecture and design patterns, including experience building and maintaining RESTful APIs * Solid understanding of relational databases (e.g. SQL Server) and experience with data modelling and query optimization * Experience with Microservices architecture, containerization, and cloud environments (Azure and/or AWS) * Familiarity with Azure DevOps, Terraform, Kubernetes and/or CI/CD pipelines is an advantage * High proficiency in English both written and verbal * Familiarity with AI tools and technologies, with the ability to effectively leverage them in day-to-day work to enhance productivity, problem-solving and overall efficiency A curious, solution-oriented mindset, with a genuine interest in continuous learning and technical growth is also highly appreciated. ## Description We are growing our Madrid team and looking for a Senior Developer who wants to build meaningful software solutions together with skilled colleagues in Spain and Denmark. You will work on project-based assignments for Danish and international clients, while being part of a strong professional community where knowledge sharing, trust and work-life balance matter. ## Related Videos - [Infrastructure as Code: The Developer's Secret Weapon](https://www.wearedevelopers.com/videos/1221-infrastructure-as-code-the-developer-s-secret-weapon) - [Understanding Kubernetes in a visual way](https://www.wearedevelopers.com/videos/100085-understanding-kubernetes-in-a-visual-way) - [Rest API Antipatterns](https://www.wearedevelopers.com/videos/100208-rest-api-antipatterns) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Implementing Feature Environments with AWS and Terraform](https://www.wearedevelopers.com/videos/531-implementing-feature-environments-with-aws-and-terraform) - [Psychological Safety in Software Engineering - Jenny-Margrethe Vej & Alexandra Hou Aldershaab](https://www.wearedevelopers.com/videos/2142-psychological-safety-in-software-engineering-jenny-margrethe-vej-alexandra-hou-aldershaab) ## Related Articles - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)