Junior .NET Developer — Remote, Growth Path

Billennium; Poland; Hybrid; PLN 70,000 - 110,000; Full time

Benefits offered by this job

Udemy for Business

Private medical care

Multisport card

Language lessons

Welcome pack

Remote/hybrid work options

Career growth opportunities

Global collaboration

Job summary

Billennium is a global technology company seeking a Junior .NET Developer for a long-term collaboration. The role focuses on resolving incidents, enhancing .NET apps, and maintaining SQL Server solutions while supporting deployments and monitoring.

You will develop REST APIs, perform system integrations, and work with IIS, Azure components, and Microsoft Graph. Strong English and Polish communication is essential, with a growth-oriented, collaborative team environment.

Qualifications

• 1-3 years of commercial experience in C#/.NET development.
• Strong knowledge of SQL Server and writing SQL queries.
• Experience debugging applications using Visual Studio.
• Good knowledge of Git version control.
• Experience working with Entity Framework.
• Basic knowledge of ASP.NET MVC or ASP.NET Core.
• Strong analytical and problem-solving skills.
• Willingness to develop expertise in application support and business systems maintenance.
• Strong communication skills and the ability to collaborate with clients and technical teams.
• Proficiency in both English and Polish (minimum B2 level).

Responsibilities

• Analyze and resolve incidents escalated by 1st and 2nd line support teams, including application, database, and integration issues.
• Implement functional enhancements, Change Requests, and maintain .NET applications, SQL Server solutions, and technical documentation.
• Prepare and execute deployments to test and production environments while supporting application monitoring and maintenance processes.
• Develop and maintain REST APIs, external system integrations, and authentication/authorization mechanisms.
• Support IIS, Azure components, Microsoft Graph, Azure AD integrations, and workflow automation initiatives.

Skills

C# / .NET

SQL Server

Visual Studio

Git

Entity Framework

ASP.NET MVC / Core

Analytical thinking

Communication (EN/PL)

Problem solving

Willingness to learn

Tools

Azure DevOps

Docker

Redis

React

Microsoft Graph API

Job description

Billennium is a global technology company seeking a Junior .NET Developer for a long-term collaboration. The role focuses on resolving incidents, enhancing .NET apps, and maintaining SQL Server solutions while supporting deployments and monitoring.

You will develop REST APIs, perform system integrations, and work with IIS, Azure components, and Microsoft Graph. Strong English and Polish communication is essential, with a growth-oriented, collaborative team environment.