Senior Software Engineer

Capgemini; Diegem; Hybrid; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Hybrid work policy

FlexAbroad program

Certification programs

Job summary

Capgemini is seeking a .NET Software Engineer to design and build scalable software solutions. You’ll work with stakeholders to translate requirements into robust applications and contribute across the full software lifecycle in a cloud/AI-enabled environment.

You’ll develop with C#, ASP.NET Core, and REST APIs, applying secure authentication and modern DevOps practices. This hybrid role expects strong English/Dutch communication.

Qualifications

• Strong experience in C# and modern .NET, including enterprise-grade apps.
• Expertise in ASP.NET Core, Web APIs, MVC and RESTful services.
• Solid knowledge of Entity Framework Core and SQL Server for data modeling and performance.

Responsibilities

• Develop and maintain scalable .NET applications aligned with requirements.
• Ensure high-quality deliverables via testing, reviews and best practices.
• Contribute to solution design with input on architecture (microservices, APIs, cloud-native).
• Build and expose robust APIs using ASP.NET Core with REST/OpenAPI standards.
• Implement secure apps using modern authentication/authorization (OIDC, OAuth2, JWT).
• Leverage modern tooling and AI-assisted development to boost productivity.

Skills

C# & .NET

ASP.NET Core

Web APIs

EF Core & SQL Server

CI/CD & DevOps

Azure Cloud

Dutch & English

French asset

Job description

Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired bya collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizationsunlock the value of technology and build a more sustainable, more inclusive world.

YOUR ROLE

As a .NET Software Engineer at Capgemini, you design and build scalable, high-quality software solutions. You work closely with business and technical stakeholders to translate requirements into robust, maintainable and future-proof applications.

You operate in modern engineering environments at the intersection of cloud, microservices and AI-enabled development, contributing across the full software lifecycle while ensuring solutions are secure, reliable and aligned with enterprise standards.

Your Key Responsibilities

• Develop and maintain scalable .NET applications aligned with functional and non-functional requirements
• Ensure high-quality deliverables through testing (unit and integration), code reviews and engineering best practices
• Contribute to solution design and provide technical input on architecture (microservices, APIs, cloud-native)
• Build and expose robust APIs using ASP.NET Core, following REST and OpenAPI standards
• Implement secure applications using modern authentication and authorization mechanisms (OIDC, OAuth2, JWT, claims)
• Leverage modern tooling and AI-assisted development practices to optimize productivity and quality

YOUR PROFILE

• You have strong experience in C# and modern .NET, including recent versions such as .NET 8/10, building enterprise-grade applications
• You have proven expertise in ASP.NET Core, Web APIs, MVC and RESTful services, including Swagger/OpenAPI, experience with Blazor and any other modern front-end framework (Angular, React, Vue, ...)
• You have obtained a solid knowledge of Entity Framework Core and SQL Server, including data modeling and performance optimization
• You have experience with modern development practices: testing (unit/integration), CI/CD, DevOps, and cloud platforms (preferably Azure)
• You have a professional working proficiency in Dutch and English. French constitutes an asset.

What You'll Love About Working Here

• Variety of projects to expand expertise and new opportunities to grow
• Certification programs and opportunities to learn
• Flexibility to work the way that works for you with hybrid working policies and FlexAbroad program

About Capgemini

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organizations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations.

Make it real | www.capgemini.com