.NET Developer

Job Title: .NET Backend Developer

Language: English, French or Dutch

Location: Brussels, Belgium

Duration: ASAP -8 months with possible of extension

Work Mode: Hybrid (2 or 3 days onsite per week)

Work regime: Full time

Job Description - Roles and Responsibilities

About the Role:

Our client in the Financial Sector is looking for an experienced Back-End .NET Developer to join their team. In this role, you will be responsible for designing, developing, and maintaining robust back-end applications and integration services that support key business operations.

You will work closely with business and technical teams to translate business requirements and user stories into scalable, high-quality technical solutions. This position requires strong analytical skills, technical expertise, and the ability to work independently in an Agile environment.

Experience Required:

• 5 to 10 years of relevant professional experience

Key Responsibilities:

• Design, develop, and maintain back-end applications and integration services
• Translate business requirements and user stories into technical solutions
• Build and maintain scalable APIs and service-oriented applications
• Contribute to the design and implementation of microservices-based architectures
• Develop solutions following object-oriented design principles and SOLID principles
• Work with relational databases to ensure efficient and reliable data management
• Participate in unit testing, mocking, and quality assurance activities
• Collaborate effectively within an Agile development environment
• Support and contribute to CI/CD pipelines and deployment practices

Required Qualifications:

Academic degree in a technical field OR Proven professional experience of at least 5 years in developing back-end applications and integration services

Required Technical Skills:

• Strong experience with .NET and C#
• Hands-on experience with ASP.NET
• Good understanding of async/await
• Strong knowledge of Object-Oriented Programming (OOP)
• Experience with ORM frameworks such as:
• NHibernate
• Entity Framework
• Good understanding of SOLID principles

Experience with:

• Unit Testing
• Mocking
• Experience in API design, including:
• REST
• gRPC
• Knowledge of OpenAPI / Swagger
• Experience with Relational Databases, preferably MS SQL Server

Specific Competencies:

• Experience with Microservices Architecture
• Knowledge of Event-Driven Architecture
• Experience with Service Bus technologies, preferably:
• NServiceBus
• Experience integrating with RabbitMQ
• Good understanding of Domain-Driven Design (DDD)
• Familiarity with CI/CD practices and tools

Soft Skills

• Strong analytical and problem-solving skills
• Ability to work independently
• Comfortable working in an Agile environment
• Strong communication and collaboration skills
• Ability to translate functional needs into practical technical solutions