Senior Full-Stack Developer – .NET, React, Azure & Terraform

Krakow-based opportunity with a hybrid work model.

As a Senior Full-Stack Developer, you will work on the Hilda 2.0 modernization project for a financial services organization. You will help migrate legacy applications to a modern Azure architecture supporting internal regulatory reporting in Israel, leading complex technical transformation in a highly regulated environment.

Responsibilities

• Design and develop backend services and REST APIs in .NET 9 using Clean Architecture principles.
• Build and maintain React and TypeScript microfrontends integrated through module federation.
• Evolve MSSQL and Azure SQL schemas, optimize queries, and implement stored procedures.
• Author Infrastructure as Code in Terraform to provision Azure resources across environments.
• Develop, optimize, and support CI/CD pipelines in Azure DevOps, including automation and deployments.
• Integrate Azure AD (Entra ID) authentication, apply security best practices, and manage secrets with Key Vault.
• Instrument services for observability, including Application Insights and structured logging.
• Troubleshoot production issues, implement fixes, and support continuous deployment cycles.
• Collaborate in Agile teams to plan, review, and refine work processes.

Requirements

• 5+ years of full-stack development experience with C#/.NET (.NET 6+/9) and ASP.NET Core.
• Strong hands-on expertise with EF Core and MSSQL/Azure SQL, including query tuning and stored procedures.
• Practical experience with Azure services, including App Service, Azure SQL, Storage, Key Vault, and Functions.
• In-depth Infrastructure as Code knowledge using Terraform, including modules and multi-environment setups.
• Proven experience with Azure DevOps pipelines, YAML, and release management.
• Experience building and securing REST APIs with OAuth/JWT authentication, including Azure AD integration.
• Experience with automated testing frameworks: xUnit, Jest/Vitest, and Playwright.
• Good understanding of observability tools, including Application Insights and OpenTelemetry.
• Strong Git practices and peer code review discipline.
• Excellent English for technical communication (B2+).

Preferred Qualifications

• Production experience with React and TypeScript.
• Familiarity with Azure Data Factory, Databricks/Spark, and Power BI.
• Experience with microfrontends and module federation.
• Knowledge of Docker and Kubernetes (AKS).
• Experience with Bicep or ARM templates alongside Terraform.
• Knowledge of event-driven architectures using Service Bus and Event Hubs.
• Experience modernizing legacy UI and services, including ASP.NET MVC/Razor, WPF, and WinForms.
• Azure certifications: AZ-204, AZ-400, AZ-104, or HashiCorp Terraform Associate.

Language

• Communicative English with fluent command is required.

Eligibility

• Only candidates with an existing legal right to work in the European Union will be considered.

Please include a CV, preferably in English, and a statement confirming consent to the processing and storage of personal data.