NET Developer — TDD, Agile & Full Lifecycle

SNI; Wrocław; On-site; PLN 120,000 - 180,000; Full time

Job summary

SNI, a trusted IT outsourcing partner, is seeking a seasoned .NET/C# developer to join our team in Wrocław. You will build and enhance core solutions (Prosit+) and related systems, while crafting automated tests to ensure quality across the full software lifecycle.

You will collaborate with architects, analysts, and testers on requirements and epics, and provide 2nd/3rd-level support during business hours. A strong Agile mindset and user-centric problem solving will help drive continuous tooling

Qualifications

• Deep expertise in .NET/C#, SOLID principles, and Clean Code practices.
• Hands-on proficiency with desktop and database technologies: C#, WPF, SQL, XML, JSON, and ORMs (NHibernate or Entity Framework).
• Experience with core development tools: Visual Studio, SQL Server Management Studio, and Azure DevOps.
• Strong commitment to Agile practices, teamwork, open communication, and user-centric problem-solving.

Responsibilities

• Build and maintain new functionalities and modifications for core solutions (Prosit+) and related systems across the full software lifecycle.
• Design, write, and execute automated test suites (unit, integration, and UI functional tests) prioritizing testability and code quality.
• Participate in system analysis, business requirements gathering, and creation of epic artifacts alongside architects, analysts, and testers.
• Provide rotational 2nd/3rd-level technical support for end-users during standard operational hours (8:00-17:00).
• Drive continuous improvement of engineering tools, practices, and pipelines within an Agile framework.

Skills

C# / .NET

SOLID Principles

Clean Code

WPF

SQL

XML

JSON

ORMs (NHibernate / EF)

Agile

Teamwork

User-centric problem solving

Tools

Visual Studio

SQL Server Management Studio

Azure DevOps

Job description

SNI, a trusted IT outsourcing partner, is seeking a seasoned .NET/C# developer to join our team in Wrocław. You will build and enhance core solutions (Prosit+) and related systems, while crafting automated tests to ensure quality across the full software lifecycle.

You will collaborate with architects, analysts, and testers on requirements and epics, and provide 2nd/3rd-level support during business hours. A strong Agile mindset and user-centric problem solving will help drive continuous tooling