Senior Backend Software Engineer (.NET)

• Minimum 5 years of experience in backend or distributed systems engineering
• Strong proficiency in C#, .NET 8/10, ASP .NET Core, Azure Functions
• Experience with SQL Server (T-SQL, EF Core, RLS) and NoSQL databases (CosmosDB preferred)
• Practical knowledge of Azure services (Functions, Service Bus, Blob Storage, App Configuration, Application Insights)
• Understanding of OAuth2, JWT, and identity provider integrations
• Experience with multi-tenant SaaS architectures
• Familiarity with asynchronous, message-driven systems
• Knowledge of CI/CD, Terraform, Docker, Kubernetes
• Strong testing discipline and communication skills

• End-to-end development of backend features using ASP .NET Core APIs, Azure Functions, SQL Server, and CosmosDB
• Building and extending .NET services in a microservices architecture
• Implementing resilient, asynchronous workflows using Azure Service Bus
• Designing secure and efficient data access patterns (SQL Server, CosmosDB)
• Ensuring multi-tenant data isolation and compliance with security standards
• Using Azure services such as Service Bus, Blob Storage, App Configuration, Application Insights, and Entra ID
• Writing unit and integration tests (xUnit, Moq, FluentAssertions)
• Contributing to CI/CD pipelines (GitHub Actions, Azure DevOps)
• Working with Terraform, Docker Compose, and Azurite
• Identifying and resolving performance, security, and reliability issues
• Independently delivering backend features from design to production
• Participating in architecture discussions and code reviews
• Collaborating with product and frontend teams on API design
• Mentoring junior engineers and promoting AI-driven development practices

Administratorami danych osobowych są Grafton Recruitment Sp. z o.o., z siedzibą w Warszawie, Mokotowska 64 (KRS: 0000744760) oraz podmioty wskazane w Polityce Prywatności. Z Inspektorem Ochrony Danych Osobowych można skontaktować używając adresu: iod(at)gigroup.com lub pisemnie na adres siedziby. Dane osobowe będą przetwarzane w celu realizacji procesu rekrutacji (podstawa prawna: art. 22(1)