Senior DotNet Engineer (Backend)

Job Summary Responsibilities

• Design and implement domain-driven bounded contexts using MediatR, FluentValidation and CQRS.
• Define the Dapper-first + EF Core data-access strategy with a clean repository / adapter pattern.
• Implement ambient multi-tenancy (e.g. an ICnpContext-style context flowing through the MediatR pipeline).
• Integrate OIDC authentication via Duende IdentityServer and typed feature flags via Microsoft.FeatureManagement.
• Ensure no secrets live in source or images, consuming configuration from Azure Key Vault.
• Drive test-first development with xUnit + FluentAssertions and meaningful coverage gates.
• Instrument services with OpenTelemetry and Application Insights for unified traces, metrics and logs.
• Mentor developers through pairing, code reviews and design discussions.

Required technical skills and competencies

• 6+ years of C# / .NET development with strong .NET 8 / ASP.NET Core expertise.
• Deep experience with MediatR, CQRS and FluentValidation in production systems.
• Strong data-access skills across Dapper and EF Core, plus advanced SQL Server / T-SQL.
• Proven application of Clean Architecture and Domain-Driven Design.
• Experience with OIDC / OAuth2 authentication flows.
• Test-first discipline with xUnit / FluentAssertions and CI/CD on Azure DevOps.

Must have skills

• Expert .NET 8 / ASP.NET Core with MediatR, CQRS and FluentValidation.
• Strong Dapper + EF Core and advanced SQL Server skills.
• Demonstrated Clean Architecture / DDD experience on real systems.
• Track record of mentoring engineers and owning technical quality.

Good to have skills

• Experience building multi-tenant SaaS with per-tenant data isolation.
• Hands-on with Duende IdentityServer or IdentityServer4.
• Experience with Azure Key Vault, feature management and Docker/AKS.
• Familiarity with OpenTelemetry-based observability.
• Hands-on experience using AI tools in the Software Development Lifecycle; Claude and GitHub Copilot preferred.

Desired attributes

• Strong ownership mindset and engineering discipline.
• High attention to detail with strong analytical and problem-solving skills.
• Effective communicator who collaborates well across distributed, cross-functional teams.
• Comfortable working in a greenfield environment with evolving standards and a test-first culture.
• Passion for continuous improvement, clean code and engineering excellence.

Interview process

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