Senior Android Engineer

At Sunweb Group, our Android app supports customers from holiday inspiration through booking and travel.

As our Senior Android Engineer, you will own features from the initial Figma design through development, testing, release and monitoring. You will work in Kotlin and Jetpack Compose on a long-lived codebase that is actively modernised—with quality, stability and customer experience at the centre of every decision.

Location: Girona preferred / Rotterdam possible
Way of working: Flexible hybrid
Contract: Full-time
Team: Team Cuba – Mobile

• Build and evolve customer-facing Android experiences using Kotlin and Jetpack Compose.
• Own features from refinement and technical design through testing, Play Store release and production monitoring.
• Act as a technical reference for Android through code reviews, architectural decisions and mentoring.
• Align closely with iOS and backend engineers to deliver platform parity without sacrificing native quality.
• Evolve a modular Gradle codebase using pragmatic clean-architecture principles.
• Apply dependency injection, Coroutines and Flow effectively.
• Integrate and protect revenue-critical customer journeys involving payments, excursions, transfers etc.
• Use Firebase, Analytics and New Relic to understand user behaviour and improve app health.
• Use modern and agentic coding tools pragmatically to improve productivity and code quality.

You will join Team Cuba, our mobile team. The team is growing to two Android engineers, two iOS engineers, one backend engineer, a Product Owner and an Engineering Lead.

Most engineers are based in Girona, while the Product Owner works from Rotterdam. We work flexibly and communicate deliberately across locations.

As our second Android engineer, you will bring independent ownership from day one and help make the platform and team more resilient.

Kotlin
· Jetpack Compose
· Gradle
· Coroutines
· Flow
· Kodein
· Ktor
· Data Store
· Compose Navigation
· Git Hub Actions
· Fastlane
· Firebase
· New Relic
· Azure
· Figma
· Google Play Console
· Copilot

• Several years (5+) of strong Kotlin experience in production Android applications at meaningful scale.
• Production experience with Jetpack Compose.
• Solid knowledge of Coroutines, Flow, state management and the Android lifecycle.
• Practical experience with clean or layered architecture and dependency injection.
• Experience with Gradle in a multi-module project, including build types or flavours.
• Automated testing, Git workflows, code reviews and CI as standard engineering habits.
• Play Console release-management experience, including signing, versioning and staged rollouts.
• Experience consuming REST APIs and designing reliable caching behaviour.
• Experience integrating third-party SDKs or APIs, ideally including payment services.
• Professional working proficiency in English.
• A proactive, pragmatic and low-ego ownership mindset.

• Experience with high-traffic consumer, e-commerce or travel applications.
• Accessibility, localisation and performance-optimisation experience.
• Has design skills and mobile UI/UX experience.
• Spanish, Catalan or Dutch language skills.

• Play a central role in Android architecture and technical direction.
• Work on a modernising and well-maintained application where engineering judgement matters.
• Make a direct impact on customer journeys where reliability genuinely matters.
• Collaborate closely with iOS and backend engineers while retaining the strengths of native Android.
• Help shape digital holiday experiences used by customers across Europe.

For a Dutch contract (based in our Rotterdam office):

• Monthly gross salary between €5400 and…