Senior .Net Developer (WinForms .Net 4.5 background)

Company: Spektrum
Location: Capellen, Luxembourg
Type: Contract
Posted: Aug 19, 2026
Views: 4

✨ AI Summary

Spektrum, supporting NATO and defence clients, is hiring a Senior .Net Developer in Capellen, Luxembourg. The role focuses on maintaining and developing the NDSS logistics software using WinForms .Net 4.5, C#, SQL Server 2016, CAB, WCF, and WWF. Requires 7+ years IT experience, 5+ years in .Net, plus French and English (STANAG 3333) and NATO Secret clearance. Onsite role, 3-year contract starting January 2024.

Spektrum supports apex purchasers (NATO, UN, EU, and National Government and Defence) and their Tier 1 supplier ecosystem with a wide range of specialist services. We provide our clients with professional services, specialised aerospace and defence sales, delivery, and operational subject matter expertise. We seek personnel to join our team and support key client projects.

Introduction

The Automated Integrated Product Support (IPS) Programme Office (LN) of the NATO Support and Procurement Agency (NSPA) is responsible to provide responsive, effective and cost-efficient electronic, automated and integrated logistic support on behalf of NATO or NATO Member Nations.

NDSS is an automated and integrated logistics software support tool designed, developed and supported by NSPA. It covers the main logistic functionalities such as item management, stock management, requisitioning, procurement, fleet management, transport request, maintenance and repair, property accounting and property disposal.

The modules of the application software are written in PowerBuilder and Microsoft .Net, and are implemented in a client/server environment. Web front-end of NDSS is implemented using 3-tier Architecture.

NDSS is active in 31 user organizations across NATO and areas of NATO operations.

NSPA is involved in different development projects regarding the functional evolution of NDSS and its maintenance and is also involved in the support of other integrated logistics tools.

The contracted staff shall assist NDSS team in developing and implementing different projects based on PowerBuilder and .Net technologies.

Role Responsibilities

The Senior .Net Developer with WinForms .Net 4.5 background shall work in collaboration with the Service Desk and the IT team dedicated to NDSS / ILSS software. Involved in the maintenance and development of various applications using different technologies, this resource must be flexible and have good adaptation skills. He / she shall have the following tasks and responsibilities:

  • Contribution to functional requirements definition and analysis
  • Estimation of effort for solution implementation
  • Conception, design, development and implementation of appropriate solutions
  • Maintenance of deployed solutions
  • Design and maintenance of technical guidelines
  • Contribution to integration and system tests
  • Provide the release manager with deployment relative deliverables
  • Provide technical expertise and mentoring of development staff

Required Skills and Experience

  • 7 years experience minimum in IT
  • 5 years experience in .Net technologies

Professional experience with minimum 5 years:

    • .Net 4.5 projects in C#
    • WinForms for .Net 4.5
    • Microsoft Visual Studio 2015
    • Integration with SQL Server 2016 database platforms, including tables, views, synonyms, stored procedures, functions, triggers and security development
    • SQL Server Management Studio
    • CAB (Composite Application Block)
    • WCF (Windows Communication Foundation)
    • WWF (Windows Workflow Foundation) on .Net 4.5
    • Multitier architecture - MVP Pattern

Professional experience with minimum 3 years:

    • Database Project in Visual Studio 2015
    • .Net Graphical components (such as .Net WinForms controls, DevExpress WinForms controls (2012 or later), Telerik web controls or other)
    • EAB (Exception Application Block)
    • LAB (Logging Application Block)
    • Javascript
    • Common libraries (Jquery, bootstrap)
    • Web Services
    • Active Record Pattern
    • IIS troubleshooting
    • Multithreading
    • Application Lifecycle Management
    • TFS 2015

Professional experience with minimum 1 year:

    • Logistics environment

Preferred Education and Certifications

    • Microsoft professional development certification

Soft Skills:

    • Communication
    • Team Player
    • Autonomy
    • Responsiveness
    • Flexibility and adaptability
    • Good interpersonal skills

Security Clearance

  • National Secret or NATO Secret Clearance

Language Requirements

  • Mandatory French and English – STANAG 6001 SLP 3333.

Work Arrangement

  • Onsite, Capellen, Luxembourg.
  • 215 working days per year
  • 40 working hours per week, Monday to Friday.

Travel Expectations

  • Occasional Business Travel

Contract Duration

  • Start date - January 2024
  • 3-year contract with 2x 1-year options

About the Company

Name: Spektrum

At Spektrum, we don't just say we are different; We are different. Defence, Humanitarian and Government markets are challenging, and complex to navigate, typically supported by a large ecosystem of organisations from small specialist’s to leading global enterprises. These problematic situations are demanding to steer, even for the most experienced industry party. We enable its clients to navigate this landscape and achieve their aerospace and defence market objectives, focusing on their Apex purchasers within international institutional organisations and English-speaking national governments and ministry of defence. Our extensive and fast-growing global network of subject matter experts, partners and suppliers enable Spektrum to deliver services that provide measurable differences to its clients and their objectives.

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