Oleksandr
Havrylenko

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Website

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Skills

Web, Mobile & Software Dev

Engineering & Architecture

Android

Mobile Apps

Front End

Critical Thinking

UI/UX Design

Specialization

Android Mobile Developer (Kotlin)

Hourly rate

$23/hr

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About me

Hi, I'm [Oleksandr], an Android Developer (Kotlin) specializing in complex mobile architecture and high-performance Frontend. I don't just build standard screens — I engineer secure, fast, and scalable mobile experiences. My core expertise includes: 🔸 Frontend & UI/UX: Creating pixel-perfect, responsive, and smooth interfaces. 🔸 Engineering & Architecture: Structuring scalable apps and solving non-standard technical problems. 🔸 Advanced Features: Custom networking (high-speed P2P data transfer), integrating camera-based gesture recognition, and implementing strong data security/encryption protocols. I combine critical thinking with clean code to deliver products that work flawlessly. If you need a developer who can handle both beautiful UI and hardcore logic under the hood — let's get to work!

Work experience

Recklet Group

May 2023 – Current time

Job title

Lead Android Engineer & UI Architect

Work experience & achievements

Founded and led the technical development of FoneSend, a high-performance secure messaging ecosystem. My role involved architecting the entire mobile infrastructure from the ground up, ensuring a perfect balance between military-grade security and a premium user experience. Key Achievements: Engineered WaveDrop Protocol: Developed a custom P2P data transfer protocol for sub-100ms profile synchronization and serverless media sharing. Advanced UI Engineering: Designed and implemented a complex design system using Jetpack Compose, AGSL Shaders, and Canvas API, featuring custom physics-based animations and Arc Motion transitions. Security First: Integrated robust encryption standards (AES-256-GCM, ChaCha20-Poly1305) and explored post-quantum cryptography implementations to ensure maximum user privacy. Optimization: Optimized rendering pipelines and resource management, achieving fluid 120 FPS performance even with complex visual effects and hardware-accelerated shaders.