Senior FS .NET Developer

Start Date: 07/07/2025

End Date: 31/03/2026

Location: Brussels

Work Regime: Full-time

Service Description:

We are looking for a .NET Development Service. The developer must have both backend and frontend experience, with a focus on backend (80% BE / 20% FE) as the project involves performing complex calculations. The candidate should be comfortable working in a complex/mathematical environment.

Requirements:

The developer will be expected to adhere to standards and ensure high-quality code delivery. They should have a strong knowledge of the following technologies:

Must-Have (Good Level):

• C# .NET
• SQL Server / TSQL
• Splunk
• OpenAPI/Swagger
• Blazor

Should-Have:

• Clean code, DRY, YAGNI, Sonarqube (Quality Gate)
• Coverage
• Microservice design
• Tracing
• Monitoring
• Logging
• Azure
• Angular 17+, React 18+, Typescript

May-Have (Not Required):

• Java, Maven/Gradle, Git, IDE
• JDBC, JPA, JAX-RS (REST)
• JUnit, TDD
• Bash/Shell scripting
• CI/CD, DevOps experience
• Docker, Kubernetes
• RDBMS
• Messaging/Actors (MQ/Kafka)
• Jest/Vitest, Angular Testbed
• Cypress, Playwright
• Docker compose, K8s PaaS, Helm
• Advanced Maven (dependency management, profiles, multi-module, lifecycle & phases, etc.)
• Testcontainers, DBUnit/Arquillian
• Pipelines (ArgoCD, Github, Azure)
• No(n)SQL (MongoDB, Cassandra)
• Functional Programming, MapReduce
• Webservices (WSDL)
• Advanced DevOps
• Prometheus, Grafana, ELK
• OIDC/OAuth2, Keycloak
• Vault (Secret management)
• Documentation (C4, any structured approach), Specification
• Async/parallel/concurrent
• Big data, timeseries data, data lakes
• Other JVM languages
• Modern FE stack
• BPMN
• Edifact
• Java Batch/Job (scheduling) frameworks
• Control flow frameworks (other than BPMN-based)

Soft Skills:

• Good communication skills
• Accountability for tasks

Languages:

• Fluent in English and French or Dutch
• French, with a passive understanding of Flemish
• Flemish, with a passive understanding of French
• English