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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on a complex enterprise .NET platform used globally, emphasizing identity systems and backend development. Key technologies include C#, .NET, ASP.NET Core, Entity Framework Core, SQL Server and authentication mechanisms OAuth2, OpenID Connect, JWT. Responsibilities cover backend development, performance optimization, and production troubleshooting. The offer includes private healthcare, life insurance, and sports benefits.
from: 3 June 2026
to: 3 July 2026
25 000 - 32 000 złnet (+ VAT)/ mth.B2B contract (full-time)
Offer parameters
level:mid • senior
working mode:hybrid
Kraków, Lesser Poland
Kraków, Lesser Poland
Requirements
Expected technologies
PHP
.NET
C#
Entity Framework
SQL
ASP.NET
Optional technologies
Active Directory
Playwright
Azure DevOps
Our requirements
- 5+ years of commercial experience with C# and .NET
- Strong knowledge of ASP.NET Core and modern .NET applications
- Experience with asynchronous programming and dependency injection
- Hands-on experience with Entity Framework Core
- Good understanding of SQL Server, query optimization, and database performance
- Experience with OAuth2, OpenID Connect, JWT
- Experience supporting and troubleshooting production systems
- Fluent English communication skills
Optional
- Experience with IdentityServer / Duende IdentityServer
- Understanding of Active Directory, Azure AD or Microsoft Graph
- Hands-on experience with Quartz.NET or similar scheduling frameworks
- Familiarity with SignalR, Playwright, Azure DevOps and CI/CD pipelines
Your responsibilities
- Design, develop, and maintain backend services built with C# and .NET
- Investigate and resolve complex production issues and customer-reported problems
- Optimize application performance, database queries, and system reliability
- Collaborate with Product, Support, and Engineering teams on technical solutions
- Improve architecture, code quality, and engineering standards
- Participate in technical discussions and contribute to future platform development
About the project
We are looking for an experienced Senior Software Engineer to develop and maintain a complex enterprise .NET platform used by global organizations. This role combines backend development, production troubleshooting, performance optimization, and work on identity-related systems.
What we offer
- Work on a mature enterprise product used globally
- Private healthcare
- Real influence on technical decisions and platform evolution
- Multisport
- International environment and collaboration with global teams
- Life insurance
- Opportunity to work with modern .NET technologies and large-scale systems
Benefits
- sharing the costs of sports activities
- private medical care
- life insurance
BRAVER IT SPÓŁKA AKCYJNA
As Venture Building, we create profitable technology companies from scratch. We collaborate with partners who share similar aspirations and are open to leveraging the potential of their networks, cultivated over years. We regularly launch new projects founded on long-term, amicable relationships with our associates.
Senior Software Engineer (.NET)
25k–32k zł / mth. (B2B)
I apply to:
BRAVER IT SPÓŁKA AKCYJNA
Kraków, Lesser Poland
Need more information?
- Make sure the body of the offer doesn’t already include what you’re looking for.
- Ask a question if you need more information you’re interested in.
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