Freelancer profile translated to English.
Back to original languageAbout Ismael
??Senior Android Developer - 12 years of experience · Kotlin · KMP · Full Remote
I design robust, scalable, and secure Android applications for over 12 years, from architecture to production.
My playground: ambitious projects and demanding environments where quality, security, and performance are non-negotiable. Notably, I was a key contributor to Kard, an app with 100K+ downloads.
💡 What I bring
Architecture & System Design
Clean Architecture, MVVM, multi-modules, offline-first strategies - I design solid foundations that scale.
Kotlin & Jetpack Compose
My daily stack. Modern, reactive, and maintainable interfaces with Compose, Coroutines, Flow, and Material Design 3.
Kotlin Multiplatform (KMP)
Cross-platform Android/iOS applications with up to ~80% shared code, without compromising native experience.
Quality & Testing
TDD, unit and UI tests, automated CI/CD, I achieved 85%+ test coverage on production fintech projects.
AI & LLM
Growing experience in generative model evaluation, prompt engineering, and reviewing AI-generated Kotlin code.
📈 Some concrete results
→ 100K+ downloads on Kard (fintech, 4.5★)
→ 0 critical bug at the launch of a KMP app (MAIA)
→ ~30% reduction in build time through modularization (Navwei)
→ ~40% reduction in crash rate after architectural refactoring (CO ORGANIZ)
→ 85%+ test coverage (My Jungly)
→ 15+ applications delivered to production
🤝 My way of working
Full remote for 9+ years, I naturally integrate into distributed and international teams. My approach: autonomy, transparent communication, iterative deliveries in Agile, and total commitment over the long term.
Looking for a senior Android developer capable of carrying your project from A to Z?
Let's discuss your needs, I'm available to talk about it.
French
Native or bilingual
English
Native or bilingual
Spanish
Conversational
Remote only
Primarily works remotely
Experience
- FreelanceSenior Android DeveloperNovember 2025 - January 2026 (2 months)End-to-end development of an intelligent coaching assistant integrated into a high-performance mobile application, using a modern architecture to ensure scalability and fluidity.🛐️Tech Stack & Expertise
- Languages: Kotlin, KMP, Compose Multiplatform.
- Architecture: Kotlin Multiplatform (KMP) for sharing business logic (Data, Domain, Network).
- UI/UX: Jetpack Compose for a modern, reactive, and accessible Android interface.
- Artificial Intelligence: Integration of LLMs (Gemini) with handling of response streaming and user context.
- Local Storage & Sync: Room KMP for offline data persistence.
📋Key Achievements- Multiplatform Architecture: Implementation of a robust KMP foundation allowing 70% code sharing between Android and iOS, reducing maintenance costs.
- AI Coaching Engine: Implementation of a conversational chat system capable of providing personalized real-time advice (health, sports, or productivity).
- Performance Optimization: Fine-tuned Kotlin coroutines for latency-free navigation, even during intensive AI processing.
- Data Security: Encryption of communications and compliance with GDPR for sensitive user data.
📈Business Impact- Engagement: Increased user retention through an interactive and personalized experience.
- Speed: Reduced Time-to-Market thanks to the Multiplatform approach.
- Quality: Highly testable code (Unit Tests, UI Tests) and complete technical documentation.
A project that allowed me to push the boundaries of KMP and AI integration on mobile, with the same goal: clean code serving a fluid experience. - MAIASenior Android DeveloperEDUCATION AND E-LEARNINGNovember 2024 - March 2025 (4 months)At MAIA, I developed an intuitive and high-performance Android application using Jetpack Compose and Kotlin Multi-platform, supporting their therapy school's mission to foster personal development.✅ Main achievements:Development of the Android application in Kotlin, leveraging Jetpack Compose to create modern, reactive, and declarative interfaces.Design and implementation of an astrological chart calculation system, ensuring accurate and real-time results.Optimization of the user experience through intuitive workflows for generating and exploring detailed astrological data.Application of MVVM architecture and Clean Architecture principles (SOLID) to ensure maintainability and scalability.➠ Technical skills:➢ Kotlin, Jetpack Compose, MVVM architecture, Clean Architecture, SOLID, Kotlin multi-platform.🚀 Impact: The application has provided students and users with an accessible and effective tool for generating astrological charts, enriching the school's offerings and expanding its reach.
- MY JUNGLYSenior Android EngineerBANKING AND INSURANCEOctober 2021 - July 2024 (2 years and 9 months)Paris, FranceAt MyJungly, I participated in the creation of Delupay, an intuitive and secure mobile application to simplify daily payments and financial management.✅ Main achievements:Development of the Android application in Kotlin, following MVVM architecture and Clean Architecture principles (SOLID).Implementation of a smooth onboarding process and advanced user account management.Design of an instant payment system via QR Code.Optimization of the user experience through modern and intuitive interfaces.✅ Technical skills:➢ Kotlin, ViewModel, Navigation Component, MVVM architecture, Clean Architecture, SOLID.🚀 Impact: The application has improved the simplicity and speed of payments while offering an exceptional user experience.
Reviews
Guillaume
Guidiyam
Reviewed on 2/14/2018
Very good professional, quality code and good communicator. Happy to have worked with Ismael.
AD
Account deleted
Reviewed on 1/12/2018
Thank you Ismaël for your efficient work on the development of the Android app. I hope to entrust you with more missions of this kind soon.
Ismael has chosen to hide 1 review
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Education
- Master of Science in Computer Engineering (5-year degree)Supinfo LYON2015
Certifications
- Building Industry-Level Apps With Multi-Module ArchitecturePHILIPP LACKNER´S COURSE2022