About Ilias
I’m a Senior Android Developer and certified Scrum Master with over 10 years of experience delivering high-quality mobile solutions across fintech, health, and enterprise sectors. As a long-time freelancer, I’ve successfully led and contributed to projects for top-tier German banks such as Sparkasse and DKB, where security, reliability, and regulatory compliance were paramount.
With deep expertise in Kotlin, Coroutines, Jetpack Compose, and Clean Architecture, I build modern, scalable apps with a strong focus on performance, UX, and maintainability. I bring a full-stack mindset to Android development—collaborating closely with design, backend, and product teams to deliver features that provide real business value.
Throughout my freelance career, I’ve taken full ownership of Android products—from architecture to release—while mentoring junior developers, improving CI/CD pipelines, and establishing development best practices. My Scrum Master certification (PSM I) enhances my ability to drive agile workflows, facilitate cross-functional collaboration, and ensure fast iteration cycles.
Currently, I’m working with Ebwoo Ltd on cutting-edge mobile solutions and always open to impactful freelance or leadership opportunities—especially in product-driven, agile teams that value autonomy and technical excellence.
Specialties:
• Kotlin, Coroutines, Jetpack Compose, Flow, Architecture Components
• MVVM, Clean Architecture, Modularization, Firebase, Retrofit
• Agile / Scrum, Jira, Git, CI/CD (Bitrise, GitHub Actions)
• Test-Driven Development, UI/Unit Testing, MockK
• Fintech, Healthcare, Lifestyle apps
• Cross-functional team leadership & mentoring
Greek
Native or bilingual
English
Fluent
German
Fluent
Can work on-site
Hagen (up to 50km)
Experience
- Ebwoo LtdFreelance Senior Android DeveloperSeptember 2014 - Today (11 years and 9 months)• Developed native and cross-platform Android applications, fulfilling diverse client requirements across various industries.• Provided end-to-end Android app development services, encompassing conceptualization, design, development, testing, and deployment.• Collaborated with a team of skilled developers and designers to create innovative and user-friendly mobile solutions.• Offered strategic consulting to businesses, assisting in identifying mobile app development opportunities and defining app strategies.• Optimized existing Android applications to improve performance and user engagement.• Delivered ongoing maintenance and support services to ensure application security and up-to-date functionality.
- AOK Sytems GMBH,Senior Android DeveloperJuly 2024 - May 2025 (10 months)Berlin, Germany• Led the migration of reactive components from RxJava to Kotlin Coroutines and Flow, significantly improving asynchronous workflow robustness and predictability. This involved expert handling of lifecycle-aware streams, coroutine cancellation, and structured concurrency.• Designed and implemented new features using Kotlin and Jetpack Compose, resulting in modern, intuitive, and accessible user interfaces for a large-scale, enterprise-grade healthcare application.• Modernized the testing infrastructure by rewriting legacy unit and integration tests, leveraging Koin for dependency injection and Coroutines test utilities. This resulted in a cleaner, more scalable integration test structure, improving test execution speed and maintainability.• Developed and implemented features within a large-scale, enterprise-grade healthcare application, adhering to clean code principles and the MVVM architectural pattern to ensure maintainability and scalability. This improved application performance and long-term maintainability.• Fostered best practices in modern Android development within the team, contributing to a high- quality and maintainable codebase.
- DKB Factory,Senior Android DeveloperApril 2021 - July 2023 (2 years and 3 months)Berlin, Germany• Developed and delivered critical customer-facing features for the DKB mobile banking app, a complex, security-sensitive fintech application.• Implemented core features using Kotlin and clean architecture principles, ensuring code scalability, readability, and testability.• Designed and developed dynamic, responsive, and accessible user interfaces using Jetpack Compose, enhancing user experience and streamlining UI development.• Leveraged RxJava for robust asynchronous workflow management, handling complex data streams and threading to maintain application responsiveness.• Contributed to significantly improved functionality and reliability of the DKB mobile banking app, meeting both business and user requirements within a demanding financial environment.
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Education
- Master in Information Systems (MIS)Open University of Cyprus2010Master in Information Systems (MIS)
- Bachelor of ScienceAristotle University of Thessaloniki2004Bachelor of Science