Senior .NET Backend Developer

Belmont Lavan

. Design, develop, maintain, and support .NET 8/10 backend services, Windows Services, and ASP.NET Core APIs .

Posted 9/23/2026contractViborg • DenmarkSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in .NET 8/10 backend development, ASP.NET Core API design, and Azure services integration, with a strong focus on certificate lifecycle management and CI/CD pipeline optimization. Proven ability to troubleshoot complex production issues and enhance system security and performance.

Highest-signal resume keywords

C# ProgrammingASP.NET Core API DevelopmentMicrosoft Azure IntegrationX.509 Certificate ManagementCI/CD Pipeline Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C#.NET 8/10ASP.NET CoreWindows ServicesAzure Blob StorageAzure Key VaultAzure Application InsightsGitPowerShellAsynchronous Programming

Soft Skills

TroubleshootingProblem-SolvingCollaboration

Tools & Technologies

Azure DevOpsOpenSSLCI/CD PipelinesProduction MonitoringApplication Diagnostics

Industry Keywords

Secure Software DevelopmentEnterprise IntegrationsDevice OnboardingCertificate AutomationProduction Systems

Tech Stack

Tools & technologies

ASP.NETAzureVault.NET

About the role

Key responsibilities & impact

Design, develop, maintain, and support .NET 8/10 backend services, Windows Services, and ASP.NET Core APIs
Implement and support X.509 and other certificate-related workflows, including certificate generation, validation, storage, renewal, and lifecycle management
Develop and maintain integrations with Azure Blob Storage, Azure Key Vault, and Application Insights
Troubleshoot and resolve production issues across application, infrastructure, integration, and certificate-related workflows
Maintain and improve CI/CD pipelines, deployment automation, and release processes using Azure DevOps
Support production deployments and participate in production rollouts
Contribute to automated and manual testing, code reviews, and software engineering best practices
Participate in requirements clarification, technical discussions, and coordination with relevant stakeholders
Contribute to the continuous improvement of system security, reliability, performance, and maintainability
Provide technical support and investigation for issues across development, test, and production environments
Take ownership of technical issues from investigation through implementation, deployment, and production rollout

Requirements

What you’ll need

Strong professional experience with C# and .NET 8/10
Solid experience developing ASP.NET Core APIs and backend services
Experience developing and maintaining Windows Services
Hands-on experience with Microsoft Azure, particularly Azure Blob Storage, Azure Key Vault, and Azure Application Insights
Practical knowledge of X.509 certificates and certificate lifecycle management
Strong understanding of asynchronous programming, dependency injection, file handling, and backend troubleshooting
Experience with Git, PowerShell, CI/CD pipelines, and Azure DevOps
Experience working in Windows Server environments
Strong troubleshooting and problem-solving skills, with the ability to investigate issues across application and infrastructure layers
Comfortable working with production systems and supporting releases and deployments
Familiarity with OpenSSL and certificate automation
Experience with secure credential and secret management
Experience with production monitoring, observability, and application diagnostics
Experience developing or maintaining enterprise integrations
Experience working in security-focused or device onboarding environments
Understanding of secure software development practices and enterprise deployment processes