About us

NxtPort is building the next digital link in the digital port infrastructure of the Port of Antwerp-Bruges and develops platforms to make the logistics flows in the port faster, safer, and more efficient.

Job Description:

About the role

Are you an experienced .NET Developer who enjoys contributing at an architectural level?

As a Sr Developer – Solution Designer, you are the link between business goals and technical realization within complex maritime environments. You work end-to-end: from analysis, design, and development to integration, testing, and support. You translate functional needs into performant, scalable, and secure solutions within the Microsoft .NET and Azure ecosystem.

You build solutions that connect port terminals, transport companies, gate and badge systems, and various EDI/EDIFACT flows. You work closely with architects, analysts, infra and security teams, and safeguard the coherence between domain logic, integrations, and infrastructure.

Your responsibilities:

• Developing and maintaining .NET (C#) applications and RESTful APIs according to SOLID, Design Patterns, DDD, CQRS, and Clean Architecture.
• Translating functional requirements into technical designs and implementations in line with enterprise and security standards.
• Designing event-driven and microservice-based solutions with Azure Service Bus, Event Grid, and Event Hubs.
• Integrating Azure components such as App Services, Functions, App Configuration, Key Vault, API Management, Logic Apps, and Application Insights.
• Working with SQL Server, Dapper, and Entity Framework Core including performance optimization, transactions, and indexing.
• Creating interface and data models, API specifications, and sequence/component diagrams.
• Defining non-functional requirements (performance, scalability, availability, security, compliance).
• Guiding teams in the application of DDD-bounded contexts, command and query separation (CQRS), and domain-driven modeling.

Integration & Domain Knowledge

• Designing and developing EDI/EDIFACT flows (IFTMIN, CODECO, COARRI, IFCSUM) including validation, mapping, and error handling.
• Integrating with port and transport-related systems (Alfapass, PCS, TOS, carriers, gate access).
• Ensuring data quality, traceability, auditing, and data security across multiple domains.
• Building robust integrations with OAuth2/OIDC, Azure Entra ID / B2C, RBAC, mTLS, and Managed Identities.

DevOps, Testing & Observability

• CI/CD implementation via Azure DevOps (YAML/Classic), GitHub, and ArgoCD (GitOps), including deployment via Bicep.
• Cloud-native development with Infrastructure as Code (Terraform/Vault).
• Test automation with xUnit/NUnit, TDD where appropriate, and API contracts via Swagger/OpenAPI.
• Monitoring and observability via App Insights, Log Analytics, dashboards, and Queue Explorer.
• Root-cause analyses and structural solutions in case of incidents (3rd-line support).

Stakeholder & Team Coordination

• Collaborating with product owners, analysts, developers, and security experts to realize well-supported solutions.
• Presenting technical designs to both technical and non-technical stakeholders.
• Guiding developers in design principles, best practices, and secure coding.
• Participating in design reviews, technical workshops, and knowledge sharing within the team.
• Researching and taking ownership to introduce new standards or technologies.

Profile:

• Bachelor or master in (applied) computer science or equivalent experience.
• At least 5–8 years of experience in software development and/or solution design within a .NET and Azure environment.
• Experience in the maritime sector is a must.

Thorough knowledge of:

• .NET 6/7/8, C#, OOP, SOLID, DDD, CQRS, event-driven concepts, Clean Architecture
• Azure Services: App Services, Functions, Service Bus, Event Grid, ADF, App Insights, App Config, Key Vault, API Management, Logic Apps, Storage, Container Apps/Kubernetes
• Security & compliance: NIS2, ISO-27001, Zero Trust, OAuth2/OIDC, RBAC, Managed Identities, Azure Entra ID / B2C
• Data & integration: SQL Server, Dapper, EF Core, API Gateway, REST, EDI/EDIFACT, XML, JSON, Azure Cosmos DB
• DevOps: Azure DevOps, GitHub, YAML pipelines, ArgoCD, Terraform/Vault, Bicep
• Testing & monitoring: xUnit/NUnit, Postman, Swagger, Application Insights, Log Analytics, Queue Explorer
• Frontend integration (Blazor, React) is an asset

Practical:

• Fixed office days minimum of 2 to 3 days, remote work is possible
• Assignment can be extended after a positive evaluation
• NxtPort reserves the right to ask consultants with a self-employed status about their daily rate
• Place of employment: Havenhuis. If travel is required, the arrangements in the assignment letter apply

Security screening:

All consultants/freelancers who will be employed at NxtPort are subject to Security screening: The screening consists of a comprehensive investigation into the background and reliability of a person. This investigation is carried out by consulting various judicial and police databases. The purpose is to assess whether a person is reliable enough to perform a critical function and/or to gain access to sensitive infrastructure. The screening applies to many sectors, including the port sector.

When submitting the proposal, the Supplier must agree to only propose Consultants who are willing to undergo this security screening.

The security screening process can take up to 30 days: the Supplier accepts this waiting period and ensures that the candidate remains available during the screening process.

Only the Consultant(s) of the Supplier who are selected by the Client for this contract, will be subject to the security screening.

The Client’s Security Officer (as administrative authority) sends the individual request for security screening to the competent Federal Police, which prepares a security advice based on the security investigation.

A negative security advice is communicated to the relevant Consultant via the Client’s Security Officer (as administrative authority). This notification states the reasons justifying this decision, except for information whose disclosure could harm the fundamental interests of Belgium or the State. The notification also contains information about the possibility to appeal against this decision.

If there is no positive security result (for example, if no advice can be given) from the Federal Police, the vacancy will be closed without contracting.

If the positive security advice is lost during the term of the contract, the contract will be terminated without any compensation.