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:October - November **Availability:FulltimeWhat You’ll DoDesign and build scalable, cloud-native applications on AzureOwn technical decisions and contribute to architectureImprove and modernize existing (legacy) systemsDrive engineering practices like CI/CD, testing, and clean architectureIdentify and reduce technical debtCollaborate with product and stakeholders to deliver real impactMentor engineers and contribute to team growthHelp define team standards and technical directionOur tech stack C#, .NET, Azure, SQL, React, GitHub, GitHub Copilot, Visual Studio / VS CodeWe actively leverage AI-powered tools such as GitHub Copilot to improve productivity and code quality.What You Bring5+ years of experience with C# and .NETExperience building cloud-native applications on AzureStrong knowledge of SQL and data modelingSolid understanding of system design and clean architectureExperience with CI/CD, automated testing, and DevOps practicesExperience with legacy systems and modernizationAbility to balance speed and quality pragmaticallyOwnership mindset and drive to improve systems and processesStrong stakeholder communication skillsExperience mentoring others and influencing technical directionWhy this role is interestingYou have real influence on architecture and technical decisionsA pragmatic engineering culture focused on impactInternational product with real scale and complexityOpportunity to own and shape the technical direction and ways of working of the teamWhat We Offer For a Dutch contract (based in our Rotterdam office):Monthly gross salary between €** and €** plus 6 ATV days (based on full-time employment, excluding 8% holiday allowance).Please note: ATV days do not apply to part-time contracts.We enjoy the journey so enjoy 25 holidays based on fulltime employment.For a Spanish Contract (based In Our Girona Office)Yearly gross salary between €**,- and €**,- (based on full-time employment)We enjoy the journey so enjoy 23 holidays based on fulltime employment.Additionally, We OfferEnjoy 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.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.About Sunweb Group Sunweb Group is one of Europe’s largest online travel platforms, with over 1.3 million customers annually.We operate in 8 international markets with 600+ colleagues across Europe.We combine scale with a fast-moving, ownership-driven culture where teams are trusted to build and improve continuously.Here’s what you can expect during our selection process:Initial conversation (via video) with our Talent Acquisition SpecialistFirst interview (via video/ live) with the Team Lead and Head of TechSecond interview (via video/ live) with the Team Lead and a team memberSunweb 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.#J-***-Ljbffr

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 Why this role is interesting You have real influence on architecture and technical decisions A pragmatic engineering culture focused on impact

Opportunity to own and shape the technical direction and ways of working of the team What We Offer For a Dutch contract (based in our Rotterdam office): Monthly gross salary between €** and €** plus 6 ATV days (based on full-time employment, excluding 8% holiday allowance). Please note: ATV days do not apply to part-time contracts. We enjoy the journey so enjoy 25 holidays based on fulltime employment. For a Spanish Contract (based In Our Girona Office) Yearly gross salary between €**,- and €**,- (based on full-time employment) We enjoy the journey so enjoy 23 holidays based on fulltime employment. Additionally, We Offer 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. 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. About Sunweb Group Sunweb Group is one of Europe’s largest online travel platforms, with over 1.3 million customers annually. We operate in 8 international markets with 600+ colleagues across Europe. We combine scale with a fast-moving, ownership-driven culture where teams are trusted to build and improve continuously. Here’s what you can expect during our selection process: Initial conversation (via video) with our Talent Acquisition Specialist First interview (via video/ live) with the Team Lead and Head of Tech Second interview (via video/ live) with the Team Lead and a team member 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. #J-*****-Ljbffr