Job Description:

An Android Developer is a key member of the technology team, responsible for designing, developing, and maintaining secure and high-quality applications for the Android platform. This includes writing clean and efficient Kotlin code, collaborating with cross-functional teams to define and deliver new features, troubleshooting and debugging to optimize performance, and ensuring a seamless and privacy-focused user experience. Android Developers are also expected to stay up-to-date with the latest trends and tools in Android development to continuously improve code quality and development efficiency.

Qualified candidates for this role bring deep expertise in native Android development, particularly in Kotlin, and have contributed to the successful delivery of large-scale applications. A strong grasp of mobile architecture patterns (such as MVVM), threading, and memory management is essential, along with experience handling complex data structures and implementing security and privacy best practices. The ideal candidate is a strong team player, comfortable collaborating across disciplines, and has excellent problem-solving and communication skills.

What you will do:

- Design, build, and maintain advanced Android applications using Kotlin.
- Implement UX/UI designs and contribute to improving user experience and accessibility.
- Collaborate closely with product managers and designers to define requirements and scope.
- Integrate with back-end systems and services using modern Android tools and architectures.
- Work on features that enhance user privacy, security,



and usability (e.g., autofill improvements, phishing & malware protection).
- Troubleshoot, debug, and optimize performance across a wide range of Android devices.
- Conduct code reviews and maintain clean, scalable, and well-documented code.
- Stay informed about Android SDK updates, libraries, and development best practices.
- Write unit and UI tests to ensure stability and prevent regressions.

Requirements and experience:

- 5 years of professional experience in Android development.
- Proven experience working on at least two large native Android applications.
- Proficiency in Kotlin and familiarity with Android SDKs and development tools.
- Deep understanding of architectural patterns such as MVVM, threading models, and memory management on Android.
- Experience with mobile app performance tuning, profiling, and security best practices.
- Solid foundation in data structures, algorithms, and problem-solving techniques.
- Comfortable using Git or other version control systems.
- Ability to translate both quantitative and qualitative data into meaningful UX improvements.
- Strong communication skills and a collaborative mindset.
- Self-driven, proactive, and comfortable taking ownership of complex problems.

What we offer:

- Collaborative work environment and challenging high-impact projects.
- Participation in an innovative team with the opportunity to work on cutting-edge technological solutions.
- Versátil schedules and the possibility of partial remote work.
- Competitive salary according to experience.

📌 Senior Android Developer (Madrid)
🏢 Denarius
📍 Madrid