Алексей

Mail: [open contact info](look above in the "contact info" section)
ALEKSEY Phone: [open contact info](look above in the "contact info" section)
RYZHENKO Telegram: t.me/ruzhenko_aleksey

Frontend/React-Native LinkedIn
GitHub
Developer
SUMMARY

Frontend / React Native Developer with 3+ years of commercial experience building
scalable web and mobile applications (iOS & Android) f rom concept to production.
Specialized in React, React Native (New Architecture — Fabric & TurboModules), Next.js,
TypeScript, Expo and Redux Toolkit.
Prof icient in REST APIs, Firebase services, push notif ications, and performance optimization
(Reanimated, FlashList, memoization techniques). Experienced in building responsive UI,
managing application state, and integrating modern AI-powered features via external APIs.
Gained Team Lead experience in a startup, leading full-cycle development of a cross-platform
application. Comfortable collaborating with designers and backend engineers in
international outsourcing environments.
Focused on delivering production-ready applications and quickly adapting to new
requirements and modern technologies.

WORK EXPERIENCE
Spice M | october 2024 - april 2026
React Native Developer
Developed cross-platform apps using React Native (CLI + Expo)
Integrated AppsFlyer, OneSignal (push notifications), Firebase Analytics
Managed OTA updates (Expo Updates) and iOS builds via App Store Connect
Worked with Reanimated, Gesture Handler, native modules
Implemented local storage (Context API + AsyncStorage)
Maintained CI/CD with Codemagic
Used AI-assisted development in Visual Studio Code with OpenAI Codex
Focused on performance, clean code, and fast delivery

Anomi | August 2023 – November 2024
React Native Developer (Team Lead responsibilities)
Developed React Native apps with real-time video/audio calls (WebRTC)
Built app architecture using Redux Toolkit, Firebase Auth, React Navigation
Led a small team: task distribution, code reviews
Worked with native modules and prebuild configurations
Implemented push notifications
Performed bug fixes, refactoring, and performance improvements
Collaborated with design, backend, and QA teams

Freelance Projects | June 2022 – October 2023
Front End Developer
Developed mobile apps using React Native for various templates and projects.
In addition to mobile development, I also created websites using React and Next.js.
Configured user interface, navigation, and integrations according to project requirements.
Integrated REST API and implemented basic state management.
 HARD SKILLS
Core Mobile
JavaScript, TypeScript, React, HTML5, CSS3, SCSS, React Native, Expo, Expo Modules
Next.js, Axios Backend & Services:
State & Data REST API, Firebase, Push Notifications, Analytics,
Redux Toolkit, Redux Appsflyer, OneSignal, Node.js, Express, Socket,
Networking & Data: Multer
REST API integration, Axios, Fetch API, HTTP Architecture & Performance:
methods, request caching, error handling New Architecture, TurboModules, Hermes,
Storage & Security: modular architecture, performance optimisation
AsyncStorage, SecureStore, auth token handling Styling:
Tools & Build Tools: Tailwind, SCSS, BEM, Styled Components,
Git, CI/CD, EAS, Xcode, Android Studio, TestFlight, StyleSheet, Bulma, Lucide
Gradle, Docker, Render Process:
Testing & Quality: Agile, Scrum, Kanban, Jira, Trello, ClickUp
Jest, ESLint, Prettie, Vitest Animations
AI: Animated, React Native Reanimated, Lottie
Cursor, GitHub Copilot, Claude 4, Claude Code, GPT-
5, OpenAI Codex

ACHIEVEMENTS

Team Leadership & App Launch
Led full-cycle development of a cross-platform fitness application as Team Lead,
successfully launching it on App Store and Google Play.
Performance Optimization
Improved app performance using New Architecture (Fabric + TurboModules), Reanimated,
React.memo, useCallback and useMemo and FlashList, achieving up to 40% faster
rendering.
Offline-First Architecture
Designed an offline-first architecture with efficient local caching, reducing data
consumption by 30% and ensuring seamless app usage without network connection..
Key Feature Integration
Successfully integrated push notifications, Stripe payments, and interactive maps,
significantly increasing user engagement.
Codebase Modernization
Migrated legacy codebase to modern TypeScript stack with clean architecture, improving
maintainability and development speed.
AI-Assisted Development
Actively used AI tools (Cursor, Codex, GitHub Copilot) to accelerate development and
reduce boilerplate time by ~30%.
SOFT SKILLS
Leadership & Team Lead experience in a startup environment
Effective negotiation and resolution of technical disagreements
Quick adaptation to new requirements and technologies
Strong attention to detail and focus on high-quality results

EDUCATION
Kryvyi Rih National University, Ukraine Geodesy IT School GoIT Fullstack Developer 2022-2023
and land management 2012-2017

LANGUAGES
English — A2 Ukrainian — Native Russian — Native