Fullstack Engineer

Our requirements

• 5+ years of commercial full-stack experience with .NET (6+/9), ASP.NET Core, and C#
• Strong EF Core and SQL (Azure SQL / MSSQL) skills (query tuning, indexing, transactions, stored procedures)
• Hands-on Azure experience – App Service, Azure SQL, Storage Account, Key Vault, Service Bus / Functions
• Solid Infrastructure-as-Code expertise with Terraform
• CI/CD pipelines experience in Azure DevOps (YAML build/release, environment promotion)
• In-depth understanding of REST API design and security (OAuth2, JWT, OIDC)
• Automated testing (xUnit, Playwright, Jest/Vitest) and TDD practices
• Observability and logging tools: Application Insights, Serilog
• Good Git practices, PR reviews, and agile team collaboration
• Fluent English (B2+) proficiency for technical collaboration

Optional

• Production experience with React + TypeScript
• Knowledge of Azure Data Factory, Databricks, Power BI
• Familiarity with microfrontends / Module Federation
• Event-driven integrations (Service Bus, Event Hubs)
• Docker/Kubernetes (AKS), ARM/Bicep templates
• Experience modernizing monolithic UIs (e.g., Razor, WinForms)
• Azure Certifications (AZ-204, AZ-400) or HashiCorp Terraform Associate

Your responsibilities

• Design and implement backend services and APIs in .NET 9, applying Clean Architecture principles
• Build and maintain React + TypeScript microfrontends using a shared UI library with Module Federation
• Manage MSSQL / Azure SQL schemas, write/tune T-SQL and EF Core queries
• Author Terraform IaC templates (modules, state, multi-environment provisioning) for Azure resources
• Implement and optimize Azure DevOps CI/CD pipelines (YAML-based)
• Secure APIs using OAuth2/JWT, Azure AD (Entra ID), and Key Vault for secrets management
• Instrument services for observability (Application Insights, Serilog structured logs), add health checks and alerts
• Read and refactor legacy .NET and T-SQL logic for incremental migration
• Write automated tests: unit, integration, API, and end-to-end coverage
• Troubleshoot and fix production incidents, enhancing operational stability
• Actively participate in Agile ceremonies, estimate stories, review PRs, and contribute to best practices
• Note: Detailed project information will be shared during the recruitment process.

About the project

This is how we organize our work

This is how we work on a project

• TDD
• Continuous Deployment
• Continuous Integration
• DevOps
• issue tracking tools
• test automation
• testing environments

What we offer

• Flexible cooperation model – choose the form that suits you best (B2B, employment contract, etc.)
• Hybrid work setup – 2 days a week from the office in Kraków
• Collaborative team culture – work alongside experienced professionals eager to share knowledge
• Continuous development – access to training platforms and growth opportunities
• Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more
• High quality equipment – laptop and essential software provided

Benefits

• sharing the costs of sports activities
• private medical care
• sharing the costs of professional training & courses
• life insurance

Mindbox Sp. z o.o.