Jan De Nul Group

Company Name: Jan De Nul Group
Job Title: System Engineer Network & Security
Job Description: **Job title** System Engineer – Network & Security **Role Summary** Responsible for designing, implementing, and maintaining the global network and security infrastructure for an international maritime and offshore business. Ensures high‑performance network operation, robust data centre performance, and proactive cybersecurity across distributed offices, ships, and remote sites. Acts as the final support tier within the ICT team, troubleshooting escalated network and security incidents and driving continuous improvement projects. **Expectations** - Deliver and sustain secure, scalable network solutions in line with corporate standards. - Provide timely, effective resolution of service tickets and escalated technical issues. - Collaborate closely with cross‑functional teams (Technical Support, Infrastructure, Projects) to support new deployments and upgrades. - Maintain updated documentation, configuration baselines, and asset inventories. **Key Responsibilities** - Design, configure, and deploy routers, switches, firewalls, load balancers, VPNs, and SSL/TLS solutions (Cisco, Aruba, Fortinet, Palo Alto, F5). - Manage WAN connectivity, security perimeter, and network segmentation across multiple sites and vessels. - Patch, upgrade, and monitor network and security devices; conduct vulnerability assessments and remediate findings. - Lead network performance tuning, capacity planning, and incident response activities. - Troubleshoot complex network and security problems, escalating when necessary; furnish detailed root‑cause analyses. - Produce and update technical documentation, SOPs, and troubleshooting guides. - Support global projects by providing network and security expertise during planning, design, and implementation phases. **Required Skills** - In‑depth knowledge of enterprise routing, switching, and firewall technologies (Cisco, Aruba, Fortinet, Palo Alto). - Hands‑on experience with F5 BIG‑IP, SSL/TLS, VPN technologies, and network monitoring tools. - Strong analytical and problem‑solving abilities under tight deadlines. - Excellent communication in English; Dutch proficiency is required. - Project‑oriented mindset with proven ability to manage multiple concurrent tasks. **Required Education & Certifications** - Bachelor’s degree in Information Technology, Computer Science, or related field. - Minimum 3 years of professional experience in network and/or security administration. - Relevant vendor certifications preferred: CCNA/CCNP, Aruba Certified Network Technician (ACNT), Fortinet NSE (NSE 4/5), Palo Alto Networks Certified Network Security Engineer (PCNSE), F5 Certified Technology Associate (F5-CTA). ---

Aalst, Belgium

Hybrid

Junior

07-12-2025

Company Name: Jan De Nul Group
Job Title: Senior/Lead Fullstack Software Developer
Job Description: **Job title** Senior/Lead Full‑Stack Software Developer **Role Summary** Architect, develop, test, and coach high‑quality .NET core and web applications for enterprise business processes. Translate functional specifications into technical designs, guide a development team, and maintain coding standards across the organization. **Expectations** - Lead code reviews and ensure adherence to architecture and quality guidelines. - Mentor junior developers and provide technical direction for the team. - Collaborate with Technical Architects, Functional Analysts, and stakeholders to deliver robust solutions. - Actively participate in continuous integration, release automation, and environment setup. **Key Responsibilities** - Design, write, unit‑test, and deploy scalable .NET Core/C# solutions, including Blazor, Angular, and ASP.NET Web API services. - Interpret functional specifications, create detailed technical designs, and document architectural decisions. - Conduct peer code reviews, provide constructive feedback, and enforce coding standards. - Coach and support developers in best practices, architecture application, and task planning. - Configure and maintain development environments: Git, Azure DevOps pipelines, Jira, branching strategies, and CI/CD workflows. - Ensure database stability and performance via SQL and stored procedures. - Design and implement data synchronization, offline capabilities, and reporting (Power BI, Crystal Reports). - Assist in architectural evolution (SOA, micro‑services, RESTful APIs). - Engage in continuous improvement of development processes and toolchains. **Required Skills** - 5+ years professional experience in full‑stack development. - Proficiency in .NET Core, C#, ASP.NET Web API, Blazor, Angular, JavaScript. - SQL Server development, stored procedures, and database design. - Experience with source control (Git), CI/CD (Azure DevOps), and issue tracking (Jira). - Understanding of architectural principles: SOA, micro‑services, RESTful services. - Ability to read UML or other modeling languages. - Strong communication, problem‑solving, and team‑coaching ability. - Knowledge of offline applications, WinForms, data sync, scripting (PowerShell), and reporting tools is a plus. **Required Education & Certifications** - Bachelor’s degree in Computer Science, Software Engineering, or related IT field. - Relevant certifications (e.g., Microsoft Certified: Azure Developer Associate) are desirable but not mandatory.

Aalst, Belgium

Hybrid

Senior

28-12-2025

Company Name: Jan De Nul Group
Job Title: Software Developer .NET
Job Description: **Job Title** Software Developer .NET **Role Summary** Develop, support, and maintain business‑critical .NET applications for a global maritime and shipyard organization. Translate functional specifications into robust, maintainable code, participate in design discussions, and provide technical support for deployed solutions. **Expectations** - Deliver high‑quality, testable code on time. - Continuously improve and refine specifications and solutions. - Communicate effectively with stakeholders and maintain a deep understanding of the business domain. - Maintain proficiency in Dutch to interact with internal teams. **Key Responsibilities** 1. Translate and critique functional specifications. 2. Write clean, structured, testable C# code. 3. Leverage existing class libraries, include meaningful comments. 4. Follow established design principles, coding standards, and conventions. 5. Use modeling languages (e.g., UML) for analysis and implementation. 6. Build knowledge of business domain and emerging technologies. 7. Provide technical support for developed applications. **Required Skills** - .NET (Core) development with C#. - Web frameworks: Blazor, Angular. - RESTful services with ASP.NET Web API. - SQL and stored procedures. - Experience with offline applications, WinForms, data synchronization. - Scripting: JavaScript, PowerShell. - Reporting tools: Crystal Reports, Power BI. - Architectural concepts: Service‑Oriented Architecture (SOA). - Ability to interpret UML diagrams. - Fluent in Dutch (mandatory). **Required Education & Certifications** - Bachelor’s degree in Computer Science or equivalent professional experience. - Minimum five years of professional software development experience. ---

Aalst, Belgium

On site

Mid level

29-12-2025

Company Name: Jan De Nul Group
Job Title: Project Cost Controller Wallonia
Job Description: Job Title: Project Cost Controller Role Summary: Oversee financial performance of civil and environmental engineering projects by monitoring budgets, tracking costs, and producing timely financial reports to ensure alignment with project objectives. Expectations: - Recent graduate or early‑career professional in economics, finance, or accountancy. - Strong analytical and detail‑oriented mindset. - Ability to work both independently and as part of a project team. - Fluent in French, Dutch, and English. Key Responsibilities: - Prepare and update project budgets, forecast enrolments, and cost forecasts. - Track all project costs and revenues, ensuring monthly financial data accuracy. - Generate structured financial reports for management and board presentations. - Provide insights and support to project and site managers regarding financial results. - Monitor and adjust figures as required, ensuring compliance with financial goals. - Stay current on controlling practices and contribute to continuous improvement. Required Skills: - Proficiency in accounting and cost‑control principles. - Advanced Excel skills (pivot tables, financial modeling). - Strong analytical and quantitative abilities. - Clear, structured communication written and verbal. - Multilingual: French (native or advanced), Dutch (advanced), English (advanced). - Self‑motivated, process‑oriented, and collaborative. Required Education & Certifications: - Master’s degree in Applied Economics, Commercial Engineering, Business Sciences, or Bachelor of Accountancy; school leavers are welcome. - No specific certifications required, though experience in civil construction accounting or audit is advantageous.

Aalst, Belgium

On site

27-01-2026

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