Android Developer

We are looking for an Android Developer to lead the design and development of modern, scalable mobile applications that deliver high-quality user experiences. You’ll work cross-functionally with product, design, and backend teams to create intuitive and performant apps using Kotlin and modern Android frameworks.

This is a hands-on engineering role with the opportunity to influence mobile architecture, mentor other developers, and shape the long-term direction of Sage’s Android applications.

🏡/🏢 This is a hybrid role requiring 3 days per week in our Barcelona office.

First 90 Days

• 30 days – Ramp up on Sage’s mobile tech stack, architecture, and product roadmap. Pair with team members to accelerate onboarding and knowledge transfer.
• 60 days – Actively contribute to key product initiatives and features in development. Demonstrate increasing ownership and impact within the engineering team. Begin contributing meaningful code to the main product codebase.
• 90 days – Take ownership of feature delivery, from planning to release. Lead code reviews and ensure adherence to quality and best practices. Participate in architectural discussions and help shape technical direction. Influence mobile engineering strategy, support junior developers, and help optimize tooling and workflows.

Meet the Team

You’ll report to an Engineering Manager and collaborate closely with backend, design, QA, and product teams in a global agile setup. The mobile team values ownership, quality, and open collaboration.

How Success Will Be Measured

• Delivery of high-quality, performant Android features
• Adoption of best practices in mobile architecture and testing
• Mentorship and contribution to engineering culture
• App stability, usability, and customer satisfaction metrics

Skills You’ll Gain

• Deep exposure to enterprise-scale mobile engineering workflows
• Cross-functional collaboration with product, design, and DevOps
• Ownership of architecture, tooling, and continuous delivery
• Broader impact on mobile engineering standards and mentoring

Snapshot of Your Day-to-Day

You’ll design and implement Android features using Kotlin and modern Android architectures, own technical scoping, ensure UX consistency, and ship well-tested code to production. You’ll lead reviews, guide less experienced developers, and contribute to evolving our mobile architecture and CI/CD tooling.

Qualifications

• 3+ years of experience developing Android applications
• Strong proficiency in Kotlin and the Android SDK
• Deep knowledge of architecture patterns like MVVM and Clean Architecture
• Experience with Jetpack Compose, Hilt/Dagger, and modern Android libraries
• Solid understanding of async programming with Coroutines and Flow
• Strong testing discipline with tools like JUnit, Espresso, Mockito
• Fluent in English ; Spanish fluency is a plus

Tech Stack You’ll Work With

• Languages: Kotlin (primary), Java (legacy interoperability)
• Architecture & Frameworks: MVVM, Clean Architecture, Jetpack Compose, Hilt/Dagger
• Libraries: Coroutines, Flow, Retrofit, Room, WorkManager, Navigation Component
• Tooling & CI/CD: Gradle, Git, GitHub Actions, Bitrise
• Testing: JUnit, Espresso, Mockito, Instrumentation/UI testing

💚 At Sage, we offer you an environment where you can grow professionally without compromising your personal well-being. Our benefits package is designed to provide stability, flexibility, and balance:

• Flexible benefits: exchange part of your salary and make tax savings on health insurance, meal and transport vouchers, childcare, and training.
• Well-being: Free access to the Calm app (for up to 5 users), 24/7 counselling, and emotional support from our Healthy Mind Coaches. We also offer self-care and parenting resources through the Cleo app.
• Flexible working: flexibility of working one hour in, one hour out, shortened workdays on Fridays and during the summer, and the opportunity to work from over 40 countries for up to 10 weeks per year through our Work Away program.
• Annual leave: 23 working days of vacation, 5 paid days per year for volunteering, and 5 additional paid days annually for personal or professional development.
• Extended leave: 7 extra days of maternity leave and 5 extra days of paternity leave, on top of the legal allowance, available after one year of service.
• Financial support: Life and disability insurance, salary advances of up to 3.5 times your net monthly pay, a €300 net marriage bonus, and access to Sage's employee stock purchase plan at a discounted rate.

Health and Safety Responsibilities

• Fostering the safety culture, by leading with your own example.
• Following established safety procedures and reporting potential hazards promptly helps maintain a secure and efficient workplace.
• Participating in safety training sessions and adhering to preventive guidelines and procedures, the objective is minimizing risks and protecting yourself and the rest of your colleagues.