C#.net Software Engineer

C# .net Software Engineer (senior) – Application Support & Systems Integration FRENCH/ENG

Location: Brussels / Zaventem Start: ASAP. FREELANCE

We are looking for a hands-on Software Engineer to join a technical team responsible for maintaining, supporting and integrating business-critical software applications.

The role combines software development, application support, troubleshooting, systems integration and configuration. You will take ownership of production issues, perform root-cause analysis, implement fixes and work across application, database, infrastructure and networking layers.

Key Responsibilities

• Provide 2nd/3rd line application support and resolve complex production issues.
• Diagnose problems across software, databases, networks and system interfaces.
• Perform root-cause analysis and implement permanent fixes.
• Develop and maintain system integrations and data interfaces.
• Work with APIs, messaging systems and real-time data flows.
• Configure and maintain high-availability and redundant environments.
• Support software deployments, testing and system configuration.
• Collaborate with developers, infrastructure teams, technical teams and external stakeholders.
• Produce technical documentation, troubleshooting guides and operational procedures.
• Contribute to software stabilisation, refactoring, automation and CI/CD initiatives.
• Help modernise test environments and improve overall system reliability.

Technical Skills

Programming

• C# / .NET Framework / .NET Core
• Python (an advantage)
• PowerShell / Bash
• Multi-threaded and event-driven applications

Databases

• SQL Server / PostgreSQL
• Complex SQL queries and stored procedures
• Performance tuning
• Database redundancy/failover
• Data migration and ETL

Integration & Messaging

• OPC UA / industrial communication
• MQTT / AMQP
• TCP/IP and socket-level troubleshooting
• XML / JSON
• Message brokers
• Real-time data processing and event-driven architectures

Infrastructure

• Windows Server
• Linux / Red Hat / CentOS
• VMware / Hyper-V
• VPN, RDP, SSH
• Remote access and secure connectivity

DevOps & Tools

• Git / GitLab / GitHub
• CI/CD pipelines
• Docker
• Jira / Confluence
• ITIL / service management

Networking & Security

• TCP/IP
• Firewalls, proxies and NAT
• TLS/SSL and certificate management
• Secure remote access
• Network segmentation and DMZs

Experience Required

• 3+ years' experience in Software Engineering, Systems Integration, Application Support or a similar technical role.
• Strong debugging and root-cause analysis capability.
• Comfortable troubleshooting complex systems across multiple technical layers.
• Experience working in production/mission-critical environments is advantageous.
• Strong communication and technical documentation skills.
• Able to work independently while collaborating with technical and business stakeholders.

Nice to Have

• Industrial automation / SCADA / PLC experience
• Experience with DevOps and CI/CD
• Infrastructure-as-code exposure
• ITIL/service management experience
• French language skills
• Experience in logistics, transportation or other 24/7 operational environments

Please read the information in this job post thoroughly to understand exactly what is expected of potential candidates.

The mindset is crucial. xirbnpk

The ability to influence, change, want to change/improve and get stuck in

top firm, top management, lots of work. Not always easy and always a challenge

If you get to this bit, you must be keen and thorough (good work), email me direct,