Middle .NET Full Stack Engineer

N-iX; Kraków; Hybrid; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Flexible work format

Competitive salary

Mentorship program

Active tech communities

Job summary

N-iX is seeking an experienced Software Engineer to join a team delivering high-impact, enterprise-scale software for public sector funding and financial management systems.

You will contribute to a large ecosystem of core transactional systems, reporting tools, and public portals, implementing features, integrating microservices, and migrating services to modern technologies (.NET 6/8). Join Agile teams using Azure DevOps.

Qualifications

• Bachelor's degree in IT/CS or related field.
• 3+ years of professional experience in software development.
• Experience in Agile/Scrum with Azure DevOps.

Responsibilities

• Analyze requirements, extract business logic from legacy systems, and create UML artifacts.
• Design, maintain, and expand back-end services and front-end portals using C#/.NET, REST APIs, and modern UI tools.
• Write anti-corruption layers to safely isolate legacy code from new components.
• Design and optimize database access structures using MSSQL and EF Core (Code-First).
• Create decoupled unit tests, write feature documentation, and conduct E2E testing.
• Participate in daily stand-ups and Agile/Scrum ceremonies via Azure DevOps.

Skills

C#

NET Framework 4.8

NET 6/8

ASP.NET MVC

REST APIs

Entity Framework Core

MSSQL

Azure DevOps

Agile/Scrum

Education

Bachelor’s Degree in IT/CS

Tools

Azure DevOps

Job description

The state’s central driver of ICT policy

We are looking for an experienced Software Engineer to join a dedicated team working on high-impact, enterprise-scale software solutions for public sector funding and financial management systems.

The candidate will work within a large-scale ecosystem comprising core transactional systems, reporting tools, and public application portals. You will play a key role in developing new features, integrating modern microservices, refactoring legacy components, and migrating services to modern technologies (.NET 6/8, modern web frameworks).

Key Responsibilities

• Systems Analysis & Architecture: Analyze requirements, extract business logic from legacy systems, and create modeling/visualization artifacts using UML standards.
• Full-Stack Development: Design, maintain, and expand back-end services and front-end portals using C#/.NET, REST APIs, and modern UI tools.
• Legacy Refactoring & Decoupling: Write anti-corruption layers and seams to safely isolate legacy code from new, modern application components.
• Data Access & Databases: Design and optimize database access structures using MSSQL, Entity Framework Core (Code-First), and the repository pattern.
• Testing & Quality Assurance: Create decoupled unit tests, write feature documentation, and conduct end-to-end (E2E) testing on newly built features.
• Agile Collaboration: Participate in daily stand-ups and Agile/Scrum ceremonies, managing code, documentation, and tasks via Azure DevOps.

Requirements

Education & Experience:

• Bachelor’s Degree in IT, Computer Science, or a related field (MQF Level 6 or equivalent).
• 3+ years of professional experience in software development and systems analysis.
• Practical experience working in Agile/Scrum environments using tools like Azure DevOps.

Technical Skills:

• Back-End & Frameworks: Strong proficiency in C#, .NET Framework 4.8, .NET 6/8, ASP.NET MVC, REST APIs, and Entity Framework Core.
• Databases: Strong knowledge and practical experience with MSSQL, Entity Framework (Code-First), and repository patterns.
• Architecture & Clean Code: Solid understanding of Object-Oriented Design (OOD), writing decoupled unit tests, and designing anti-corruption layers.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing