Senior Android Developer (Kotlin)

Our mission

Constructor’s mission is to enable all educational organisations to provide high-quality digital education to 10x people with 10x efficiency.

With strong expertise in machine intelligence and data science, Constructor’s all-in-one platform for education and research addresses today’s pressing educational challenges: access inequality, tech clutter, and low engagement of students.

Our headquarters is located in Switzerland, and we also have legal entities in Germany, Bulgaria, Serbia, and Singapore

Please send your resume in English only.

We’re seeking a talented Android Developer to join our innovative team in creating cutting-edge educational apps: Constructor Learn and Constructor Groups. You’ll play a crucial role in developing high-performance Android applications that will revolutionise mobile learning experiences.

Responsibilities:

• Develop and maintain native mobile applications for Android using Kotlin.
• Build key mobile services such as notifications, a communication hub, a calendar, and online calls.
• Implement platform-specific features and user interface designs while ensuring high performance.
• Perform regular code reviews and ensure clean architecture principles (MVVM, Clean Architecture).
• Write unit and integration tests to maintain code quality and reliability.
• Work with backend services to ensure seamless data integration and syncing between apps and external APIs.

Required Experience:

• At least 5+ years of experience in native Android app development using Kotlin.
• Strong understanding of OOP, SOLID principles, and design patterns.
• Experience working with RESTful APIs and integrating external services.
• Proficiency with Kotlin Coroutines for asynchronous programming.
• In-depth knowledge of Android SDKs, libraries, and best practices for performance optimisation.

Preferred Qualifications:

• Familiarity with architecture patterns (BLoC, MVVM, Clean Architecture).
• Experience working on projects with complex integrations, such as LMS or CRM systems.

Technical Skills:

• Programming Languages: Proficiency in Kotlin and Java.
• Frameworks and Libraries:
• Familiarity with MVVM and Clean Architecture patterns.
• Proficiency in Retrofit, Room, LiveData, and StateFlow.
• Development Tools: Android Studio, Gradle, Git.
• Testing: JUnit, Espresso.

Technology Stack:

• Frameworks: Jetpack Compose or XML for UI.
• Libraries: Retrofit (API integration), Room (local database), LiveData / StateFlow (state management).
• Tools: Android Studio, Gradle, Git.
• Testing: JUnit, Espresso.

About the Product

Imagine an app that puts the power of a world-class education in the palm of your hand. Constructor products cover all facets of learning from self-education with AI to online teaching. In the app, they will be unified to become the go-to platform for learners of all ages and backgrounds.

Key Features:

• Seamless access to a rich catalogue of courses.
• Interactive learning experiences with text, video, and quizzes.
• Personalised learning paths and progress tracking.
• Integration with calendars for efficient study planning.
• Offline mode for learning anytime, anywhere.
• Powerful AI for all learning purposes.
• Online calls for lectures and practice in education.

Why This Project Matters

In today’s fast-paced world, education must be accessible, engaging, and adaptable. Our project aims to:

• Break down barriers to quality education.
• Cater to the growing mobile-first audience.
• Provide cutting-edge tools for educators and learners alike.
• Foster a global community of lifelong learners.

The Tech Behind the Magic:

We’re adopting a hybrid approach, combining the best of native mobile development and web technologies:

• Kotlin Multiplatform (KMP) for shared business logic, maximizing efficiency.
• Swift and Kotlin for platform-specific features, delivering the best possible user experience.
• Provide the development of cutting-edge mobile apps for Android.
• Craft intuitive user interfaces that make learning a joy.
• Integrate cool features like real-time communication, interactive polls, and virtual breakout rooms.
• Ensure our apps are fortress-level secure and privacy-compliant.

What we offer:

• Competitive salary.
• Comprehensive health insurance.
• Choice of equipment ( i.e. laptop, monitor, etc).
• Flexible working schedule.
• International company with large-scale projects and global clients.
• Community of passionate experts to exchange knowledge and expertise with.
• Opportunity to contribute to the better future of education together with a friendly and open-minded team.

Constructor fosters equal opportunity for people of all backgrounds and identities. We are led by a gender-balanced board committed to building a diverse and inclusive organisation where everyone can become their best self. We do not discriminate based on age, disability, gender identity, sexual orientation, ethnicity, race, religion or belief, parental and family status, or other protected characteristics. We welcome applications from women, men and non-binary candidates of all ethnicities and socio-economic backgrounds. We encourage people belonging to underrepresented groups to apply.