At Sunweb Group, we’re building and evolving the core systems behind millions of holidays each year. As a Senior Software Engineer, you contribute directly to how our platform is designed, scaled, and improved.
You’ll work in a small, autonomous Agile team where ownership, pragmatism, and quality go hand in hand. This role goes beyond coding — you influence architecture, improve engineering practices, and help the department grow.

Location: Rotterdam / Girona Sunweb Group office (Hybrid)
Start date: October - November 2026
Availability : Fulltime

What you’ll do
- Design and build scalable, cloud-native applications on Azure
- Own technical decisions and contribute to architecture
- Improve and modernize existing (legacy) systems
- Drive engineering practices like CI/CD, testing, and clean architecture
- Identify and reduce technical debt
- Collaborate with product and stakeholders to deliver real impact
- Mentor engineers and contribute to team growth
- Help define team standards and technical direction

Our tech stack
C#, .NET, Azure, SQL, React, GitHub, GitHub Copilot,



Visual Studio / VS Code
We actively leverage AI-powered tools such as GitHub Copilot to improve productivity and code quality.

What you bring
- 5+ years of experience with C# and .NET
- Experience building cloud-native applications on Azure
- Strong knowledge of SQL and data modeling
- Solid understanding of system design and clean architecture
- Experience with CI/CD, automated testing, and DevOps practices
- Experience with legacy systems and modernization
- Ability to balance speed and quality pragmatically
- Ownership mindset and drive to improve systems and processes
- Strong stakeholder communication skills
- Experience mentoring others and influencing technical direction

Not ticking every box? At Sunweb Group, we believe curiosity, energy, and the right mindset matter more than meeting every single requirement. If this role excites you, we’d love to hear your story — let’s explore the jou

📌 Senior Software Engineer (España)
🏢 Sunweb Group
📍 España