Senior .NET Developer (Azure, Banking)

Quick Facts

• Role: Senior .NET Developer (Azure, banking industry)

• Focus: Backend services, REST APIs, React microfrontends, Azure/DevOps, database modernization

• Location/Work style: Kraków, hybrid model

Description

Modernize and migrate legacy banking portfolio applications to a native Azure cloud environment. Build and evolve .NET 9 REST APIs and React + TypeScript microfrontends, while improving database schemas and Azure infrastructure. Participate in CI/CD, security (Azure AD), observability, automated testing, and production support.

Responsibilities

• Design and implement backend services and REST APIs in .NET 9 using Clean Architecture

• Develop and maintain React + TypeScript microfrontends

• Develop and maintain MSSQL / Azure SQL schemas

• Create and maintain Infrastructure as Code with Terraform for Azure resource provisioning

• Build, optimize, and support CI/CD processes in Azure DevOps (YAML pipelines)

• Integrate Azure AD authentication and apply security best practices

• Instrument services for observability and system state monitoring

• Analyze, refactor, and extract business logic from legacy .NET and T-SQL during migration

• Create and maintain automated tests (unit, integration, and E2E)

• Troubleshoot production incidents and support deployments

Requirements

• Minimum 5 years of commercial full-stack experience with C#/.NET (including .NET 6+/9) and ASP.NET Core

• Strong EF Core skills and MSSQL/Azure SQL experience, including query optimization and stored procedures

• Practical experience with Azure services: App Service, Azure SQL, Functions

• Infrastructure as Code experience with Terraform provisioning across multiple environments

• CI/CD experience with Azure DevOps, including YAML pipelines-as-code

• Practical knowledge of building and securing REST APIs with validation and authentication

• Experience with automated testing frameworks: xUnit and Jest/Vitest

• Knowledge of observability tools such as Application Insights and structured logging

• Strong Git practices and code review discipline

• Advanced English proficiency

• (Nice to have) Observability practices knowledge and automated test experience

Benefits

• Great Place to Work

• Stable financial situation

• Contracts with global brands

• Internal training center

• Many experts to learn from and an open, accessible management team

• Profit sharing

• Passion Sponsorship

• Regular team events and integration trips

• Comfortable, well-equipped offices

• MySii app

• Medical care