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Oliver James
Senior .Net & Blazor developer – Brussels – Long-term contract

Senior .Net & Blazor developer – Brussels – Long-term contract

Hybrid

Brussels, Belgium

Senior

Freelance

05-02-2026

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Skills

C# Visual Studio SQL CI/CD DevOps Docker Version Control Jenkins Azure DevOps Architecture git Autonomy Organization SQL Server Azure Recruitment .NET .NET Core CI/CD Pipelines

Job Specifications

For a large Belgian organization operating in a complex, mission-critical environment, I am looking for Medior and Senior .NET / Blazor Developers to support the ongoing digitalization of large-scale operational and planning systems.

The role offers stability, technical depth, and continuity, with a hybrid working model and a long-term horizon until at least mid-2028.

Job Description

As a .NET / Blazor Developer, you will contribute to the development and maintenance of business-critical applications in a public transport context.

Key Responsibilities

Develop and maintain applications using .NET / C# and Blazor
Build and consume REST APIs using .NET Core Web API
Work with Azure DevOps and CI/CD pipelines
Apply layered architectures and design patterns
Collaborate within an experienced development team in a regulated environment
Ensure code quality through unit testing and SOLID principles

Technical Environment

.NET / C#
Blazor
Azure DevOps
MS SQL Server
ORMs: Entity Framework, Linq2SQL, Dapper
DevOps & tooling: Docker, AKS, Jenkins, YAML
Visual Studio 2022

Practical Information

Start date: Ideally 1st of March (ASAP)
Duration: Long-term mission, at least until mid-2028
Work mode: Hybrid – 2 days onsite in Belgium
Recruitment process: One interview round (technical skills & team/cultural fit)

Candidate’s Profile

Required Technical Skills (Non-Negotiable)

.NET / C#: minimum 5 years of hands-on experience
Blazor: minimum 5 years of hands-on experience
Azure DevOps: 8 years of experience
Strong experience with:
MS SQL Server
ORMs (Entity Framework, Linq2SQL, Dapper)
Experience in the public transport or railway sector is a strong asset

Technical Evaluation Criteria

REST API development using .NET Core Web API
Strong knowledge of GIT and version control practices
Experience with:
Layered architecture
Design patterns (CQRS, Repository, Unit of Work, Command, Singleton)
SOLID principles
Unit testing best practices
Azure PaaS services
CI/CD pipelines

Soft Skills & Languages

Strong team player with a high level of autonomy
Clear and professional communicator
Comfortable working in structured and regulated environments
English: professional working proficiency
French or Dutch: required

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About the Company

We introduce talented people to great organisations so that both may grow and benefit from each other’s experiences, helping to fulfil their potential. We understand that each client’s mix of people, culture, and objectives is unique, so our approach and solutions are flexible and adapted to each person, team, company, and situation. Although your relationship with OJ is with your local consultant(s), their network, relationships, and knowledge of diverse local candidate pools are backed by those of their local permanent... Know more