Senior .NET C# Software Engineer

About the role

We are looking for a Senior Software Engineer to join our cross‑functional squad and help shape the core of our AI‑powered expense management platform. You will design, build and maintain high‑performance .NET services that serve thousands of users worldwide.

Key responsibilities

• Collaborate within an autonomous squad to deliver valuable features end‑to‑end.
• Design and extend core systems, micro‑services and REST APIs.
• Write clean, testable code and automated tests, and monitor performance in production.
• Implement infrastructure and CI/CD pipelines using Infrastructure as Code.
• Contribute to front‑end work when needed, including Angular components.

Required profile

• Several years of backend development experience.
• Strong knowledge of .NET and C#.
• Proficiency with Entity Framework or similar ORM and SQL Server.
• Experience optimizing performance and scalability for large user bases.
• Familiarity with LLMs and service‑oriented architecture (Service Bus) is a plus.
• Knowledge of Azure, AWS or GCP cloud platforms.
• Willingness to learn front‑end technologies.

Required skills

• .NET
• C#
• Entity Framework
• NHibernate
• SQL Server
• Azure Cloud
• AWS
• GCP
• Angular
• Service Bus
• LLMs
• Infrastructure as Code
• REST APIs
• Microservices

What we offer

• Competitive salary and benefits package.
• €1,000 yearly learning and development budget.
• Hybrid work policy with a weekly day in our Warsaw hub.
• International mobility program allowing temporary relocations.
• Professional freedom, flexible environment and regular team events.
• Permanent contract and comprehensive onboarding.