Senior FullStack Engineer (.NET / Azure / React)

We are seeking a highly skilled Senior FullStack Engineer with expertise in .NET, Azure, and React to join our team in evolving our portfolio of .NET applications and MSSQL databases to a modular, cloud-native architecture while enhancing legacy systems.

• 8+ years of commercial experience in Senior/Tech Lead/Full-Stack roles.
• Expertise in C#/.NET, with solid backend design skills.
• Proven Azure architecture experience.
• Advanced SQL Server skills including performance tuning.
• Strong React and good Angular experience.
• Experience with modernizing legacy UIs.
• Understanding of ETL processes and reporting tools.
• CI/CD and automation practice proficiency.
• English proficiency (B2/C1 level) for communication and documentation.

Nice to have:

• Operational experience with Kubernetes (AKS).
• Advanced use of Terraform.
• Familiarity with Databricks and Spark SQL.
• Experience with event streaming technologies.
• Performance tooling and chaos engineering experience.
• Understanding of security best practices in software design.

• Lead architecture decisions and migration strategies.
• Create and maintain architectural decision records (ADRs) and API guidelines.
• Implement hands-on coding and conduct code reviews for core services.
• Mentor team engineers and formalize best practices.
• Design CI/CD automation solutions and self-service tooling.
• Ensure system reliability through observability and pattern implementation.
• Oversee data integrations and SQL Server performance strategies.
• Manage technical risks and prioritize technical debt.
• Collaborate with stakeholders to shape the development roadmap.

• Long Term Cooperation
• Rate: 160-180 pln/h + VAT
• B2B Contract
• 5 days per month in office Krakow

This is a contract position with a hybrid work model (5 days in the office per month) based in Kraków. Working hours are from 09:00 to 17:00 CET.