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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior .NET Developer - **Company:** Ayvens - **Location:** Amsterdam, Netherlands - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Clean Code Principles, .NET Framework, Application Programming Interfaces (APIs), Amazon Web Services, ASP.NET MVC Framework, Authentication Protocols, Automation of Tests, Microsoft Azure, Software as a Service, Continuous Integration, Relational Databases, Language Integrated Query, Elasticsearch, Entity Framework, Monitoring of Systems, PostgreSQL, Microsoft SQL Server, OAuth, Software Engineering, Event Driven Architecture, Build Management, Solid Principles, Information Technology, Web Api - **Published:** May 27, 2026 - **Apply:** https://nl.indeed.com/viewjob?jk=1af4dfa9b6fb378b ## About the Role Do you have experience in System security?, Do you have a Master's degree?, The ideal candidate has strong technical expertise in modern .NET technologies combined with the problem-solving mindset and collaboration skills necessary to deliver high-quality software in a cross-functional and international environment. Aside from being a seasoned engineer, you are passionate about clean code, scalable architectures, and continuous learning. * 5+ years experience with .NET 8+, ASP.NET MVC, Web API, Entity Framework / EF Core, and LINQ * Solid knowledge of relational databases such as PostgreSQL and Microsoft SQL Server * Experience building cloud-based applications on Azure and/or AWS * Proven track record implementing secure APIs and authentication mechanisms (OAuth2, Entra ID, etc.) * Strong understanding of SOLID principles and clean code practices * Experience with CI/CD, automated testing, and monitoring tools * Nice to have: experience with Elasticsearch, Hangfire, and distributed or event-driven architectures You will have relevant experience in a similar role, preferably holding a Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field . * Strong architectural and system design skills * Excellent problem-solving abilities and attention to detail * Ability to work in agile environments and manage ambiguity effectively * Strong communication and collaboration skills across teams and stakeholders * Experience mentoring or supporting other engineers is a plus * Proactive mindset with a strong sense of ownership and accountability * Fluent in English is required. ## Description As our new Senior .NET Engineer , you will be responsible for designing, building, and delivering scalable and secure software solutions while collaborating closely with cross-functional teams to drive technical excellence and continuous improvement across the engineering function. Your responsibilities will include: * Collaborate with the Engineering Manager, Product Manager, UX Designers, QA Engineers, and Business Analysts to refine requirements and deliver end-to-end features. * Take ownership of feature delivery from design and development to deployment and monitoring. * Troubleshoot complex production issues, perform root cause analysis, and implement long-term solutions. * Contribute to the continuous improvement of engineering processes, tools, and best practices. * Design and build scalable, maintainable, and high-performance applications using modern .NET technologies. * Ensure application reliability through CI/CD pipelines, automated testing, and observability practices. * Implement secure authentication and authorization mechanisms and contribute to overall system security. ## Related Videos - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Web APIs you might not know about](https://www.wearedevelopers.com/videos/281-web-apis-you-might-not-know-about) - [Optimizing Discovery: PostgreSQL's Role in Transforming GetYourGuide's Search](https://www.wearedevelopers.com/videos/1647-optimizing-discovery-postgresql-s-role-in-transforming-getyourguide-s-search) - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [Delay the AI Overlords: How OAuth and OpenFGA Can Keep Your AI Agents from Going Rogue](https://www.wearedevelopers.com/videos/1637-delay-the-ai-overlords-how-oauth-and-openfga-can-keep-your-ai-agents-from-going-rogue) - [Develop enterprise-ready applications for Microsoft Teams with Azure resources on modern web technologies](https://www.wearedevelopers.com/videos/187-develop-enterprise-ready-applications-for-microsoft-teams-with-azure-resources-on-modern-web-technologies) ## Related Articles - [How to Find Tech Jobs in Amsterdam](https://www.wearedevelopers.com/magazine/279-how-to-find-tech-jobs-in-amsterdam) - [How to land a developer job in Amsterdam](https://www.wearedevelopers.com/magazine/36-how-to-land-a-developer-job-in-amsterdam) - [Software Developer Salary in The Netherlands [2023]](https://www.wearedevelopers.com/magazine/217-software-developer-salary-in-the-netherlands-2023) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [The Netherlands – Europe’s powerhouse for software development?](https://www.wearedevelopers.com/magazine/31-the-netherlands-europe-s-powerhouse-for-software-development) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)