Full-Stack Developer

Lever Scott International; Niedernhall; On-site; EUR 65,000 - 95,000; Full time

Job summary

Lever Scott International is supporting a globally established German organisation in finding a talented Full-Stack .NET Developer to join a growing software team. You will work on a business-critical sales application used by thousands of employees to view product catalogues, access product information and support customer interactions.

You will contribute to both frontend and backend development within a Microsoft technology ecosystem, modernise the Windows app from UWP to WinUI 3, and build

Qualifications

• Proven experience with C# and .NET in a professional setting.
• Experience designing and building scalable enterprise applications.
• Familiarity with Windows desktop development (UWP/WinUI).
• Hands-on with RESTful services and SQL Server.
• Knowledge of enterprise integrations (SAP/STEP).

Responsibilities

• Develop, maintain and enhance a business-critical sales application using C# and .NET technologies.
• Contribute to both frontend and backend development, ensuring application performance, scalability and usability.
• Support the continued modernisation of the existing Windows application, including its transition from UWP to WinUI 3.
• Design, develop and maintain backend services using .NET, Entity Framework and Microsoft SQL Server.
• Develop and maintain integrations with enterprise systems, including SAP and STEP, ensuring accurate product and catalogue data flows.
• Collaborate with other developers and stakeholders to design and implement new application features.
• Work within an established development environment using Jira and Confluence.
• Utilise modern AI-assisted development tools, including Claude Code and GitHub Copilot.
• Contribute to the longer-term development and international rollout of the application.

Tools

C# / .NET

Entity Framework

SQL Server

WinUI 3 / UWP

REST APIs

SAP

STEP

Jira

Confluence

Claude Code

GitHub Copilot

Langdock

Microsoft development ecosystem

Job description

The Opportunity

Lever Scott International is currently supporting one of our largest existing customers, a globally established German organisation, in the search for a talented Full-Stack .NET Developer to join their growing software development team.

Our customer is investing in the continued development and modernisation of a business-critical sales application used by approximately 5,000 employees to present product catalogues, access product information and support customer interactions.

With ambitious plans to evolve the application into a global solution deployed across the wider international business, this is an exciting opportunity to contribute to a large-scale enterprise software project with significant long-term development potential.

You will join an established development environment, working with modern Microsoft technologies, enterprise system integrations and AI-assisted development tools.

Your Responsibilities

• Develop, maintain and enhance a business-critical sales application using C# and .NET technologies.
• Contribute to both frontend and backend development, ensuring application performance, scalability and usability.
• Support the continued modernisation of the existing Windows application, including its transition from UWP to WinUI 3.
• Design, develop and maintain backend services using .NET, Entity Framework and Microsoft SQL Server.
• Develop and maintain integrations with enterprise systems, including SAP and STEP, ensuring accurate product and catalogue data flows.
• Collaborate with other developers and stakeholders to design and implement new application features.
• Work within an established development environment using Jira and Confluence.
• Utilise modern AI-assisted development tools, including Claude Code and GitHub Copilot.
• Contribute to the longer-term development and international rollout of the application.

Technical Environment

The organisation operates predominantly within a Microsoft technology ecosystem.

Core Technologies

• C# / .NET / Entity Framework
• Microsoft SQL Server
• WinUI 3 / UWP
• REST APIs and enterprise integrations
• SAP and STEP integrations
• Windows-based application development

Development Tools & Platforms

• Jira & Confluence
• Claude Code
• GitHub Copilot
• Langdock
• Microsoft development ecosystem