Medior .NET / Angular FullStack Developer - Consultant
Permanent
FR or NL + EN

Our Digital Services team at Orange Business is a dynamic community of expert consultants revolutionizing Customer Experience, Cloud, Data, and AI across various sectors, including retail, finance, manufacturing, life sciences, and public services. 

Join our product-driven delivery team to help build a modern .NET/Angular case management platform for a global network of independent insurers, streamlining case management across 80 countries by centralizing workflows, enhancing collaboration, and providing auditable tracking from intake to resolution.
As a FullStack Developer working alongside with a Senior .NET Developer in a collaborative, agile environment, you'll contribute to new features, ongoing support, and actively participate in code reviews, backlog planning/refinement, and continuous improvement. 

This is a great opportunity for someone who enjoys owning deliverables, working close to the business, and growing their craft in a supportive, high-standards engineering culture. 

What you’ll do 
All the responsibilities we’ll trust you with

Build and deliver with quality  

• Develop and maintain backend services (REST APIs, business logic, data access) using .NET / ASP.NET Core.  

• Build user-friendly, responsive Angular interfaces with clean UI patterns and reusable components.  

• Write clean, testable, maintainable code aligned with team standards and best practices.  

  Collaborate as part of the team  

• Participate actively in code reviews (giving and receiving constructive feedback).  

• Contribute to backlog refinement, planning, estimation, and sprint ceremonies.  

• Share knowledge, tools, and approaches that strengthen the team’s overall delivery capability.  

  Support and continuous improvement  

• Provide application support (diagnosis, bug fixing, root cause analysis) and help maintain stable environments.  

• Escalate blockers early, communicate progress clearly, and manage priorities effectively.  

• Identify opportunities to improve engineering practices (CI/CD, testing strategy, performance, maintainability, developer experience).  

What you'll bring:   
What matters most for this role 

Your experience & mindset:  

• 3–4 years of professional software development experience in a full-stack or strongly backend/front-end role.  

• A strong sense of ownership: you take accountability for deliverables and work proactively to complete them on time.  

• The ability to work independently with minimal supervision while knowing when to ask structured questions to clarify complex situations.  

Backend (.NET)  

• Solid knowledge of C# and .NET (ASP.NET Core Web APIs, dependency injection, async/await).  

• Experience with ORM/data access (e.g., Entity Framework) and relational databases (SQL).  

• Understanding  API design practices (versioning, error handling, security considerations, performance).  

Frontend (Angular)  

• Strong experience with Angular, TypeScript, HTML, and CSS.  

• Familiarity with common Angular patterns (components, services, routing, reactive  

Engineering practices  

• Comfortable with Git-based workflows and collaborative branching strategies.  

• Experience writing tests (unit/integration) and applying quality practices.  

• Familiarity with Agile ways of working (Scrum/Kanban), including planning and backlog refinement.  

Languages and Communication

Strong communication and presentation skills in French and/or Dutch + English 

Nice to have
It is not a requirement, but other preferred qualifications would be: 

• Cloud experience (especially Azure) and familiarity with CI/CD pipelines (Azure DevOps, GitHub Actions, etc.). 

• Docker / containerization, basic knowledge of microservices, messaging, or distributed systems. 

• Experience with authentication/authorization concepts (OAuth2 / OpenID Connect, role-based access). 

• Automated UI testing (Cypress/Playwright) and stronger testing practices overall. 

• A master’s degree or PhD in Mathematics, Statistics, Computer Science, Engineering, Business Engineering, Physics or any related field.

Interests and soft skills we value
We seek individuals who embody our values

Agile, Expert, Together, and Authentic.
You thrive on ambitious goals, collaborate openly, and make a meaningful impact with integrity.
We value professionals who combine deep expertise with a passion for learning, innovation, and exceeding expectations.
If you show initiative, accountability, and support your colleagues, you’ll flourish with us.
Excellence comes from people who lead by example and pursue personal and professional growth.

Why you should join us: 
Some of the rewards of working at Orange Business 

• A community of experts - as Digital Natives, we put innovation at the heart of our expertise. Continuously seeking new ideas, we proudly host regular “Guild” workshops and knowledge-sharing sessions through our Data Meetups. 

• A place to strengthen both technical depth and professional skills (communication, ownership, stakeholder collaboration). 

• Exposure to real-world client contexts and business challenges where your work has visible impact. 

• Real opportunity to grow your autonomy and career growth possibilities towards roles such as Cloud Solution Architect. 

• We may work with tomorrow’s technology, but at our core we are a people-oriented organization. We value quality, feedback, continuous improvement, as much as collaboration, openness, inclusivity and well-being at work.

• Hybrid way of working and modern & collaborative office in Brussels 

• Compelling advantages including a yearly bonus scheme, a flexible mobility with possibility for a housing budget, representation and expense allowances… 

Ready to build with us? 

Apply with your CV and (if available) links to GitHub, portfolio, or examples of work that reflect your experience. 

More about Orange Business: 
Check out our website for even more or connect with us on LinkedIn.