Intern Fullstack Software Engineer (.NET & React) 1

On site Full time Your future team Join our Digital Factory, a multidisciplinary team where technology professionals and business experts work together to build high-impact digital solutions for the financial sector. We develop modern, data-driven products in an Agile environment, with strong collaboration, continuous learning, and a shared focus on quality and client value.

The advantages of joining us

• Innovative work that matters Build data-intensive applications using modern technologies, engineering standards, and AI-enabled tooling.
• Career growth, your way Benefit from continuous learning opportunities, coaching, and a clear development path from junior to more senior roles.
• Global impact, local connections Work on international projects and collaborate with diverse teams, all while making an impact locally
• Inclusive, flexible culture Embrace a culture where your voice matters, with flexible hours to balance work and life seamlessly.
• Collaborative team spirit Work hand in hand with financial experts and business teams in a dynamic, startup-minded environment.

How You’ll Contribute To Our Success

• Design, develop, and maintain robust full-stack applications with a strong focus on software engineering fundamentals in a financial services context (banking, investment funds, etc.).
• Build and optimize data-intensive solutions, APIs, and processing workflows using C#/.NET and SQL Server.
• Create intuitive and scalable user interfaces with React and related ecosystem tools.
• Apply Agile practices in day-to-day delivery, including sprint planning, collaboration, and continuous improvement.
• Promote quality across the development lifecycle through clean code, testing, CI/CD, and transparent communication on scope, progress, and delivery risks.

Your Skills

• University degree in Computer Science, Software Engineering, or another relevant field.
• Fluent English is required. French is considered an asset.
• C#/.NET (Core), SQL/relational databases, and front-end development with React
• Experience with API design/integration, test automation and CI/CD practices, and interest in AI-related tools and use cases are considered assets.
• Collaborative mindset with strong team spirit and knowledge-sharing attitude.
• Clear communication skills and ability to build trusted relationships with technical and business stakeholders.
• Analytical thinking, proactive problem-solving, and adaptability in a changing environment.

Interested? Please submit your resume in English Get to know more about Deloitte on our LinkedIn page (#DeloitteLU), Instagram page, YouTube page or website.

With more than 2,600 employees and 98 nationalities, Deloitte Luxembourg is one of the Grand Duchy's largest, strongest and oldest professional services firms. For more than 75 years, our talented teams have been serving clients in various industries delivering high added-value offerings to national and international clients in audit and assurance, consulting, financial advisory, risk advisory, tax, and related services. Deloitte Luxembourg is part of the global Deloitte network.

Deloitte provides leading professional services to nearly 90% of the Fortune Global 500® and thousands of private companies. Our people deliver measurable and lasting results that help reinforce public trust in capital markets and enable clients to transform and thrive. Building on its 180+-year history, Deloitte spans more than 150 countries and territories. Learn how Deloitte’s over 470,000 people worldwide work together every day to make an impact that matters at www.deloitte.com.