Senior .NET Developer @ AVENGA (Agencja Pracy, nr KRAZ: 8448)

AVENGA; Wrocław; On-site; PLN 150,000 - 210,000; Full time

Job summary

AVENGA in Wroclaw seeks a senior .NET developer to own the full lifecycle of the core Prosit+ solution. You will analyse requirements, design, implement, test, and maintain modules with C#, WPF, and EF/NHibernate, collaborating with architects, testers, and analysts within an Agile team.

You will write testable code, drive improvements in tools and practices, and support users during standard hours (8:00–17:00). Fluency in English and a passion for quality are essential.

Qualifications

• Strong knowledge of .NET/C# with WPF, SQL, XML/JSON.
• Adherence to SOLID and Clean Code practices.
• Experience with NHibernate/Entity Framework and Azure DevOps.
• English fluency; proactive team player in Agile environments.

Responsibilities

• Develop and maintain the Prosit+ core solution across the full lifecycle.
• Collaborate with architects, testers, and analysts to create epics and artefacts.
• Write unit, integration, and UI tests to ensure testability.
• Support users and drive continuous improvement of tools and practices.

Skills

.NET/C#

SOLID principles

Clean Code

WPF

SQL

XML/JSON

NHibernate/EF

Azure

DevOps / YAML

Microservices

ASP.NET MVC

TDD

Tools

Visual Studio

SQL Management Studio

Azure DevOps

Git

WiX toolset

Job description

Core Technical Expertise (Must-Haves)

• Deep knowledge in .NET/C#.
• A strong passion for code quality and maintainable design, including:
• Expertise in S.O.L.I.D. principles.
• Commitment to Clean Code practices.
• Strong practical experience with the following technologies:
• C#
• WPF
• SQL
• XML, Json
• NHibernate/Entity Framework
• Proficiency with development tools: Visual Studio, SQL Management Studio, Azure DevOps.

Advanced Technical & Architecture Skills

• Familiarity with DevOps practices (e.g. YAML pipelines, WiX toolset).
• Knowledge of microservices and cloud solutions (e.g., Azure)
• Experience with ASP.Net MVC is beneficial.

Professional & Interpersonal Skills

• Complete proficiency in English is required (communicative level is the minimum, but proficiency is the goal).
• Willingness to help testers, analysts, or architects as needed.
• Open-minded, honest, and a team player.
• A passion for understanding user frustrations and business opportunities.
• Strong understanding of Agile practices.
• Satisfactory communication and presentation skills.
• Flexibility regarding roles and responsibilities (teamwork).

Valued (Good to Have) Skills

• Experience with Test-Driven Development (TDD) or Test First Programming.
• Knowledge in Azure and ASP.NET

You will be a key developer responsible for the full lifecycle of the core solution (Prosit+) and related systems—from system analysis and business requirements management to implementation, enhancement, and maintenance. You will collaborate closely with architects, testers, and analysts to create artefacts for epics and drive continuous improvement of tools, methods, and practices within an Agile framework.

• Develop and implement new functionalities and modifications in existing applications.
• Write, maintain, and design for testability, including unit tests, integration tests, and UI functional tests.
• Actively support business requirements and system analysis.
• Support the user base and address their needs (standard support hours are 8:00–17:00, and support is split among all developers).

Requirements: .NET, System analysis, UI, C#, Clean Code, WPF, SQL, XML, JSON, NHibernate, Entity Framework, Azure, DevOps, YAML, Microservices, Cloud, ASP.NET MVC, Test-driven development, TDD, ASP.NET