Senior Agentic Software Engineer (.NET & AI)

Reynaers Group; Duffel; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Competitive salary

Mobility plan

Company restaurant

Professional development

Job summary

Reynaers Group seeks a Senior Agentic Software Engineer to design and build scalable .NET/Azure solutions while shaping AI-assisted engineering workflows. You will collaborate with cross-functional teams, guide AI-generated outputs, and drive governance around AI use in software development.

Ideal candidates combine deep software engineering expertise with a curiosity for AI-enabled productivity, aiming to deliver reliable, secure, and high-quality systems across cloud-native platforms.

Qualifications

• Strong foundation in software engineering and system design.
• Ability to work with AI-enhanced development processes.
• Experience with cloud-native Microsoft stack is a plus.

Responsibilities

• Design and build scalable software using .NET and Azure.
• Incorporate AI tools into daily engineering workflows.
• Break down problems for AI systems to execute efficiently.
• Review and improve AI-generated code and analyses.
• Collaborate with architects and product owners to translate requirements.

Skills

C#

CQRS

DDD

RESTful APIs

React

Bicep

Tools

GitHub Copilot

Claude Code

Job description

Senior Agentic Software Engineer (.NET & AI)

What You Do as a Senior Agentic Software Engineer

As a Senior Agentic Software Engineer, you work alongside passionate colleagues to develop innovative software products and AI-driven engineering workflows.

You are part of a multidisciplinary Scrum team that develops modern cloud-native applications on the Microsoft platform. In addition, you play an active role in the transformation toward AI-assisted and agentic software development.

Where software development once consisted primarily of manually writing code, today you increasingly collaborate with AI systems. You use AI tools and software agents to perform analyses, generate code, create tests, produce documentation, and automate repetitive engineering tasks.

You are responsible not only for building software but also for effectively guiding, evaluating, and improving AI-driven development processes.

Your Responsibilities

• Design and build scalable software solutions based on .NET and Azure.
• Use AI tools such as GitHub Copilot, Claude Code, or similar solutions as an integral part of your daily workflow.
• Break down complex business problems into tasks that can be efficiently executed by AI systems.
• Review, validate, and improve AI-generated code, documentation, and analyses.
• Develop and optimize AI-assisted engineering workflows.
• Collaborate with architects, product owners, and analysts to translate business requirements into high-quality software solutions.
• Actively contribute to engineering standards, best practices, and AI governance within the development team.
• Help transform the software development lifecycle by applying AI and automation in a responsible manner.

Your Profile

Are you an experienced software engineer with a passion for technology and a curiosity about the future of software development?

Then you might be the Agentic Software Engineer we are looking for.

You have a strong foundation in software engineering and understand that AI is not a replacement for engineering expertise, but a powerful accelerator for productivity and innovation.

You have experience with several of the following technologies:

• C#
• CQRS
• Domain-Driven Design (DDD)
• RESTful APIs
• React
• Bicep

In addition, you recognize yourself in the following qualities:

• You think in terms of systems, architecture, and long-term maintainability.
• You are able to critically evaluate and improve AI-generated output.
• You understand that reliability, security, and quality are more important than speed alone.
• You enjoy experimenting with new AI tools and continuously seek smarter ways of working.
• You combine technical depth with pragmatism.
• You are eager to learn and help colleagues grow in their use of AI within software development.

Experience in one or more of the following areas is a plus:

• AI agents and agentic workflows
• Retrieval-Augmented Generation (RAG)
• Observability and monitoring
• DevOps and platform engineering

Why This Role?

We believe that the future of software development is not about having fewer engineers, but about engineers who can effectively leverage AI.

That is why we are looking for people who not only build excellent software but also understand how AI systems can be used to learn faster, deliver better software, and create more value for our customers.

At Reynaers, you will have the opportunity to help shape the next generation of software development, where human expertise, engineering judgment, and AI work together to achieve exceptional results.

You will join the leading specialist in aluminium applications, where digital solutions play a crucial role in supporting our fabricators and R&D teams. Within this context, we build reliable and impactful digital applications using modern technologies and a strong focus on technological innovation.

This translates into a work environment where quality, ownership, and knowledge sharing are central, and where you, as a Senior C# Developer, actively contribute to solutions that create tangible value for both the business and the end user.

What We Offer

• A pleasant and dynamic working environment with new challenges every day.
• The opportunity to leave your mark on the future within a socially responsible and sustainable company that invests in innovation and digital technology.
• Opportunities for continuous professional development and training.
• A competitive salary and a wide range of attractive fringe benefits in return for your expertise and commitment.
• A mobility plan that enables you to commute in a convenient, healthy, and environmentally friendly way.
• Put on your running shoes and participate in sporting events—we cover the registration fees and sportswear.
• Experience the satisfaction of making a positive impact in the community.
• Enjoy culinary delights every day in our company restaurant.

Who We Are

As an international family-owned company, Reynaers Group improves people's living and working environments—today and for future generations.

Reynaers Group is a leading specialist in the development, distribution, and commercialization of innovative and sustainable aluminium and steel building components. With brands such as Reynaers Aluminium and Forster, we have grown from a small family business into an internationally oriented group offering energy-efficient and responsibly manufactured solutions for homes, buildings, and the people who use them.

Our slogan, "Together for Better", is more than just a tagline—it reflects how we work together as colleagues. Through our open and proactive mindset, we achieve the highest standards and the best results in every project, large or small.

Your workplace will be located on the Reynaers Campus in Duffel, the headquarters of Reynaers Group and Reynaers Aluminium. The campus includes departments such as R&D, Operations, our Technology Centre, training facilities, and more than 62,000 m² of warehouse space.

Ready to take the next step in your career and make a meaningful impact in the world of construction and aluminium solutions?