.NET Software Engineer Lead

Capgemini; Diegem; Hybrid; EUR 70,000 - 100,000; Full time

Benefits offered by this job

Hybrid work policy

FlexAbroad program

Local social activities

Job summary

Capgemini is seeking a .NET Lead Software Engineer to drive design and delivery of enterprise-grade software. You will lead teams, define architecture, and own end-to-end delivery across cloud-native, microservices, and AI-enabled development. Strong C#, .NET, Azure and security expertise are essential.

You will collaborate with stakeholders in a hybrid-setup, aligning with architectural standards and business goals while mentoring engineers and ensuring robust, scalable solutions.

Qualifications

• Strong expertise in C# and modern .NET with enterprise-grade design experience.
• Deep knowledge of ASP.NET Core, Web APIs, REST/OpenAPI, and secure design.
• Experience with Azure cloud services and integration patterns.
• Architectural mindset with microservices, cloud-native patterns and DevOps.
• Professional proficiency in Dutch and English; French is a plus.

Responsibilities

• Lead design and development of scalable .NET solutions aligned with requirements.
• Define architecture patterns (microservices, event-driven, cloud-native) and best practices.
• Act as technical lead and coach for development teams, ensuring quality and delivery.
• Take ownership of end-to-end delivery from refinement to production support.
• Ensure high-quality delivery through testing, code reviews, and CI/CD.
• Drive adoption of AI-assisted development and security best practices.

Skills

C#

.NET

ASP.NET Core

Web APIs

OAuth2/OIDC/JWT

OWASP

Azure

Service Bus

CI/CD

Git

SQL Server

Testing

Architectural patterns

Education

Bachelor's degree

Tools

Azure

Service Bus

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 Lead Software Engineer at Capgemini, you drive the design and delivery of scalable, enterprise-grade software solutions while also contributing hands‑on where needed. You combine deep technical expertise with leadership capabilities, guiding teams in building robust, secure and future‑proof applications.

You operate in modern engineering environments at the intersection of cloud, microservices and AI‑enabled development, acting as a key technical partner for stakeholders while ensuring alignment with architectural standards, best practices and business goals.

Your Key Responsibilities Include

• Leading the design and development of scalable .NET solutions, ensuring alignment with functional and non‑functional requirements.
• Defining and guide the implementation of architecture patterns (microservices, event‑driven, cloud‑native) and best practices.
• Acting as technical lead and coach for development teams, ensuring quality, consistency and continuous improvement.
• Taking technical ownership of end‑to‑end delivery, from refinement and estimation through implementation, deployment and production support.
• Ensuring high‑quality delivery through testing (unit & integration), code reviews, DevOps practices and CI/CD.
• Driving adoption of modern engineering approaches, including AI‑assisted development and security best practices.

YOUR PROFILE

• You have strong expertise in C# and modern .NET, with proven experience designing and delivering enterprise‑grade solutions
• You have obtained deep knowledge of ASP.NET Core, Web APIs, REST/OpenAPI, and secure application design (OAuth2, OIDC, JWT, OWASP)
• You have solid experience with Azure cloud services, including integration patterns (e.g. messaging such as Service Bus), networking concepts and DevOps (CI/CD, Git)
• You have strong architectural mindset with experience in patterns & best practices, data platforms (SQL Server) and modern engineering practices (testing, scalability, performance)
• You have a professional working proficiency in Dutch and English. French constitutes an asset.

What You’ll Love About Working Here

• Variety and impact of projects to grow expertise
• Variety of tools and environments to work with in multiple industries
• Open access to learning platforms for all (Udemy, Coursera…)
• Flexibility to work the way that works for you with hybrid working policies and FlexAbroad program
• Local social activities

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