Nexin - Medior / Senior BizTalk and .NET Developer

About the company
Our client is a well-established Belgian logistics and distribution company operating nationwide with multiple sites across the country. The organization manages time-sensitive distribution flows and supplies thousands of retail points daily. As part of its strategic evolution, the company is expanding into new product categories while modernizing its IT landscape. The environment combines A stable SME culture with flat hierarchy Long-term employee retention High operational criticality A strong ongoing digital transformation program To strengthen the internal IT team, our client is looking for a Medior / Senior BizTalk & .
NET Developer (minimum 5 years of experience). Your role You will join an experienced internal IT department (infrastructure + development) and actively contribute to the evolution of business-critical applications. You will: Design, develop and maintain integrations using Microsoft BizTalk Server 2020 and C#/.
NET. Create and maintain schemas, MAPS, orchestrations, pipelines, ports and adapter configurations. Develop .
NET components, services and REST/SOAP integrations; work with XML, XSD, XSLT and JSON. Write and optimize SQL Server queries and stored procedures, and implement validation, error handling and logging. Translate business requirements into technical solutions with business analysts and application owners. Day to day support Monitor interfaces and application health; investigate failed exchanges, suspended messages and processing delays. Handle daily support requests and production incidents, prioritize business impact and keep users informed. Diagnose issues across BizTalk, .
NET, SQL Server and connected systems; coordinate resolution with IT teams and external partners. Restore processing safely, including controlled message resubmission, and investigate root causes to prevent recurring incidents. Maintain support procedures, runbooks and incident records; turn recurring problems into permanent improvements. Quality and delivery Test integrations and .
NET changes, including failure scenarios, and contribute to code reviews. Manage source code in GIT and support deployments with environment-specific configurations and rollback procedures. Document interfaces and technical changes, and share knowledge with colleagues. You will collaborate closely with business stakeholders and operational teams. As a BizTalk and .
NET developer, you will work in tandem with another colleague

Your profile
At least 5 years of professional experience in software development, including proven experience developing and supporting Microsoft BizTalk and C#/.
NET solutions, ideally with BizTalk Server 2020. Strong C# and .
NET Framework skills, with hands-on experience in Visual Studio. Practical knowledge of BizTalk messaging, routing, promoted properties, MAPS, orchestrations and pipelines. Experience with XML/XSD, XSLT, JSON, REST/SOAP services and adapters such as sFTP and WCF-SQL. Solid SQL Server skills and experience troubleshooting integration or application issues in production. Experience with GIT, testing and structured deployment practices. Ability and willingness to combine development work with daily application support. Proven use of AI tools in software development, such as coding assistants for implementation, testing, debugging and documentation, with critical review of generated output and respect for data confidentiality. Fluent in Dutch or French, with a good working command of English. Additional assets Experience with SAP integrations, EDI/AS2 or other enterprise systems. Knowledge of modern .
NET, ASP.
NET Core, Azure Logic Apps, Service Bus or API Management. Experience with CI/CD, PowerShell, monitoring tools, or Jira and Confluence. Knowledge of Broadcom Automic for scheduling and monitoring automated jobs and workflows. Soft skills An analytical mindset and a methodical approach to troubleshooting. Ownership of issues through to resolution, with clear communication and a focus on business needs. Ability to manage priorities calmly, collaborate with colleagues and document solutions clearly. Work environment Multicultural team Flat organizational structure Short decision-making lines Strong collaboration culture Fun culture On-site presence in Belgium required (with homeworking) Offer Permanent contract (no freelance) Competitive gross salary depending on experience Company car (electric) + charging card Group insurance Hospitalization & ambulatory insurance Meal vouchers Annual performance bonus 20 legal holidays + 10 additional days If you are a hands-on Medior / Senior BizTalk & .
NET Developer who enjoys combining technical depth with business impact in a stable yet evolving organization, this opportunity offers strong ownership and long-term perspective