FullStack Engineer (.NET & React & Azure)

Senior Full-Stack Engineer (.NET / React / Azure / Terraform)

About the role

We are looking for a Senior Full-Stack Engineer to join a large-scale modernization programme focused on migrating a portfolio of legacy applications and databases to a modular, cloud-native architecture on Microsoft Azure. You will work across backend, frontend, database and cloud/DevOps areas, contributing directly to production solutions and supporting the incremental transformation of business-critical systems.

What we offer

• Hybrid work in Kraków, with 6 days per month in the office.
• B2B contract
• Rate : 160 -185 PLN netto/hour
• Benefits: Luxmed, Multisport Card

• At least 5 years of commercial full-stack development experience with C# and .NET, including .NET 6+ and ASP.NET Core.
• Strong knowledge of EF Core and MSSQL / Azure SQL, including query tuning, indexing, transactions and stored procedures.
• Hands-on experience with Azure services such as App Service, Azure SQL, Storage, Key Vault, Functions and Service Bus.
• Practical experience with Infrastructure as Code using Terraform, including modules, state management and multi-environment provisioning.
• Experience with Azure DevOps CI/CD and YAML pipelines.
• Experience building and securing REST APIs, including validation, versioning, OAuth, JWT and Entra ID.
• Experience with automated testing tools such as xUnit, Jest, Vitest or Playwright.
• Knowledge of Application Insights, OpenTelemetry and structured logging.
• Good Git practices and code review discipline.
• English at B2 level or higher for technical communication.

Nice to have

• Production experience with React and TypeScript.
• Experience with Azure Data Factory, Databricks, Spark, Power BI or SSRS.
• Knowledge of microfrontends and module federation.
• Experience with Docker and Kubernetes / AKS.
• Knowledge of Bicep or ARM templates.
• Experience with event-driven integration using Service Bus or Event Hubs.
• Experience modernizing legacy technologies such as ASP.NET MVC, Razor, WPF, WinForms, Windows Services or SSIS.
• Azure certifications such as AZ-204, AZ-400 or AZ-104, or HashiCorp Terraform Associate.