Senior .Net Developer Job at Absolut Data (Infogain)

Senior .Net Developer

Absolut Data (Infogain)

Location:
Poland

Category:
IT - Software Development

Contract Type:
B2B

Salary:

130.00 - 150.00 PLN / Hour

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Job Description:

For our client, we are seeking an experienced Senior .NET Developer with proven hands-on experience in migrating production applications from .NET Framework to .NET 8. The ideal candidate has extensive professional experience in C# and .NET, with a strong background in designing, developing, and maintaining .NET applications, particularly in API development and application modernization.

Job Responsibility:

Migrating production applications from .NET Framework to .NET 8
Designing, developing, and maintaining .NET applications, particularly in API development and application modernization

Requirements:

Overall 7+ years of professional experience in C# and .NET
Strong hands-on experience with: .NET Framework (4.x)
ASP.NET MVC / Web API
ASP.NET Core (.NET 6 / 7 / 8/10)
Dapper or other ORM framework
Redis
NLog or modern logging frameworks
Swagger / OpenAPI, JSON serialization and model binding
API Development and versioning strategies
Familiarity with CI/CD pipelines (Azure DevOps, GitHub Actions, etc.)
Experience deploying ASP.NET applications to IIS and/or cloud platforms
Working knowledge of certificates, secrets, and environment configuration
Comfortable working with automated test suites and quality gates
Experience in integrating AI-driven solutions
Demonstrated experience migrating applications from .NET Framework to .NET Core / .NET 8
Strong understanding of: Dependency Injection patterns across Framework and Core
Configuration models (Web.config vs appsettings.json)
Middleware and request pipeline differences
Ability to decompose migration work into small, safe PRs
Must possess a legal work permit in Poland

What we offer:

Hybrid work model combining office & remote work
Attractively located office with collaboration spaces
Onsite parking space for employees
Referral program with financial bonus
Life Insurance
Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment
Access to internal Learning Platform with multiple trainings oriented for professional growth
Access to MyBenefit platform (Multisport included)
Team Building activities
Charity initiatives
Working environment promoting diversity and inclusion
Private medical care - Platinum Package

Additional Information:

Job Posted:
January 10, 2026

Employment Type:

Fulltime

Work Type:

Remote work

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