Full Stack .NET Developer

OneTech Solutions BV; Brussel; Hybride; EUR 70 000 - 110 000; Plein temps

Résumé du poste

OneTech Solutions BV is seeking a Senior Full Stack .NET Developer with hands-on Blazor expertise to join our Product Team working on portals and platform solutions in Brussels.

You will design and build full-stack applications with .NET 8, EF Core, SQL Server, and MongoDB, applying TDD and collaborating closely with product and technical colleagues in a hybrid work environment.

Qualifications

• Strong hands-on experience with Blazor WebAssembly.
• Proficient in .NET 8 and EF Core.
• Experience with SQL Server and MongoDB.
• Familiar with Test-Driven Development (TDD) and quality-focused development.
• Experience designing portal and platform solutions.
• Ability to work in a multidisciplinary Product Team.

Responsabilités

• Design, develop and maintain full-stack applications using .NET 8 and Blazor WebAssembly.
• Develop and enhance portal and platform solutions within the Product Team.
• Build and maintain backend components and services using .NET and EF Core.
• Work with relational and NoSQL databases, particularly SQL Server and MongoDB.
• Develop and integrate asynchronous messaging solutions using RabbitMQ.
• Apply Test-Driven Development (TDD) principles to ensure reliable code.

Connaissances

Blazor WebAssembly

.NET 8

EF Core

SQL Server

MongoDB

RabbitMQ

TDD

Microservices

Description du poste

Work Model: Hybrid – minimum 2 days onsite per week

Start Date: 12 October 2026

End Date: 31 December 2027

Languages

• Dutch and/or French: Passive knowledge (an asset)
• English: Professional proficiency

Mission

We are looking for a Senior Full Stack .NET Developer with strong hands-on expertise in Blazor to join an established Product Team working on Portals and Platform solutions.

The consultant will contribute to ongoing development initiatives, working closely with product, functional and technical team members. The role requires a strong focus on software quality, maintainability and adherence to established development standards.

The successful candidate will take ownership of assigned development activities and contribute to delivering robust, scalable and high-quality applications.

Key Responsibilities

• Design, develop and maintain full-stack applications using .NET 8 and Blazor WebAssembly.
• Develop and enhance portal and platform solutions within the Product Team.
• Build and maintain backend components and services using .NET and EF Core.
• Work with relational and NoSQL databases, particularly SQL Server and MongoDB.
• Develop and integrate asynchronous messaging solutions using RabbitMQ.
• Apply Test-Driven Development (TDD) principles to ensure reliable and maintainable code.
• Contribute to high-quality code delivery in accordance with established development standards.
• Collaborate effectively with Product Team members and other technical and business stakeholders.
• Take accountability and ownership of assigned development tasks.
• Contribute to solutions based on microservices architecture where applicable.

Technical Requirements

Strong knowledge / hands-on experience required in:

• Blazor WebAssembly
• Entity Framework Core (EF Core)
• SQL Server
• MongoDB
• Test-Driven Development (TDD)

Nice to Have:

• Experience with microservices architecture
• Experience developing enterprise portals and platform solutions

Soft Skills

• Strong communication and collaboration skills
• Ability to take ownership and accountability for assigned tasks
• Quality-focused development mindset
• Ability to work effectively within an established multidisciplinary Product Team
• Proactive and solution-oriented approach

Interested? If you're an experienced Senior Full Stack .NET Developer with strong hands-on expertise in .NET 8, Blazor WebAssembly, EF Core, SQL Server, MongoDB, RabbitMQ and Test-Driven Development (TDD), we'd love to hear from you.