Senior .NET Backend Developer

About the role

We are seeking an experienced Senior .NET Backend Developer to join our banking‑focused team in Luxembourg. You will work autonomously on existing mission‑critical applications, delivering high‑quality code within an Agile environment.

Key responsibilities

• Develop, maintain and enhance backend applications using C# and VB.NET.
• Design, build and sustain REST APIs, SOAP web services and system integrations.
• Translate functional and technical requirements into robust technical solutions.
• Ensure application quality through testing, code reviews and secure development practices.
• Troubleshoot, maintain and improve existing applications.
• Collaborate closely with Business Analysts, QA, DevOps and other development teams.
• Participate in Agile ceremonies and contribute throughout the software development lifecycle.

Required profile

• Autonomous and delivery‑oriented.
• Pragmatic problem solver with a hands‑on mindset.
• Comfortable working on existing applications and collaborating with multiple stakeholders.
• Strong team player with excellent communication skills.
• Professional proficiency in French is mandatory.

Required skills

• C#
• VB.NET
• .NET Framework / .NET ecosystem
• REST APIs
• SOAP web services
• SQL Server
• Entity Framework (or similar ORM)
• OAuth2
• JWT
• Asynchronous programming
• Multithreading
• Git
• CI/CD
• Azure DevOps (or similar tools)
• RabbitMQ, Azure Service Bus, Hangfire, MassTransit (nice to have)
• Java, COBOL (nice to have)

What we offer

• A dynamic, young, and fast‑growing environment.
• Flexible thinking and working approaches.
• Hands‑on experience in a stimulating, project‑based context.
• Opportunities to learn and develop within the banking sector.