Senior Software Engineer

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: August 2026

Availability: Fulltime

• 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

We actively leverage AI-powered tools such as Git Hub Copilot to improve productivity and code quality.

• 5+ years of experience with C# and .NET
• Experience building cloud-native applications on Azure
• Strong knowledge of SQL and data modelling
• Solid understanding of system design and clean architecture
• Experience with CI/CD, automated testing, and Dev Ops 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

• You have real influence on architecture and technical decisions
• A pragmatic engineering culture focused on impact
• International product with real scale and complexity
• Opportunity to own and shape the technical direction and ways of working of the team

• Monthly gross salary between €6300 and €6700 plus 6 ATV days (based on full‑time employment, excluding 8% holiday allowance).
  
  Please note:
  
  ATV days do not apply to part‑time contracts.
• Enjoy up to 20% off when booking with our brands for you, your family, and your friends.
• As an international company we support a hybrid way of working. We provide you with office furniture and IT equipment.
• We enjoy the journey so enjoy 25 holidays based on full‑time employment.
• A personalized Reflect & Develop Plan to support your career growth.
• Benefit from coaching sessions designed to support your well‑being.
• Receive work‑from‑home and travel allowances to ease your daily routine.

Sunweb Group is an equal opportunity employer, which means we do not discriminate in any way. We celebrate diversity and are committed to creating an inclusive and safe environment for all employees.