.NET architect/Backend Azure

Note

• Candidates should be based in Belgium or France and 8 days a month at the office is mandatory

Role summary

• We're modernizing a mission-critical communications layer that routes messages and files between core systems and the outside world. As a Senior .NET architect, you will contribute to the technical design of the rewrite of an application currently developed using various technologies: .NET, IBM ACE, Service Fabric, Service Fabric.
• The target solution will be in .NET, cloud native, containerized and hosted in Azure cloud. You will design it keeping in mind the need for high resilience and performance.

Minimum qualifications

• 15+ years of professional software engineering, including 5+ years building mission-critical or high-throughput distributed systems (preferably in financial services or similarly regulated domains).
• Expert .NET engineer (C#, .NET 7/8, async/await, DI, testing frameworks).
• Azure hands-on experience: AKS, Functions, Service Bus/Event Hubs, Storage, Key Vault, Application Insights, Azure DevOps (Pipelines/Repos).
• Dapr/KEDA, gRPC, and API gateway experience.
• Containers & orchestration: Docker and Kubernetes (OpenShift and/or AKS), Helm, image life cycle, secure supply chain.
• Event-driven architecture fundamentals: pub/sub, event streaming, consumer groups, schema evolution, and exactly-once/at-least-once processing trade-offs.
• Test-Driven Development (TDD) and automation mindset; CI/CD pipelines and trunk-based development experience.
• Proven resilience engineering knowledge (timeouts, retries, circuit breaker, backpressure, outbox/inbox, DLQ, bulkhead, saga).
• Ability to work autonomously, make sound design decisions, and coach junior developers.
• Professional English (written and spoken).

Nice to have

• Observability stack: OpenTelemetry, Splunk, distributed tracing; performance and load testing at message/file-transfer scale.
• Knowledge of secure file exchange and enterprise integration patterns (SFTP/FTPS, AS2/AS4, MQ).
• Familiarity with financial messaging standards and non-functional controls (availability, integrity, confidentiality).