Олег

Oleh Middle Full-Stack Developer

Vitriachenko Full-Stack Developer with 3+ years of experience building
production web and mobile applications using React, React
Full-Stack Developer Native, Next.js, Node.js, and TypeScript. Specialized in real-time
systems, streaming platforms, mobile architecture, and scalable
product development. Experienced in AI-assisted development
olegvitracenko​@gmail.com
workflows, performance optimization, and delivering
[open contact info](look above in the "contact info" section) production-ready applications in fast-paced environments.

Kyiv, Ukraine Work Experience
[open contact info](look above in the "contact info" section) Middle Full-Stack Developer
vitriachenko-9579a9372 05/2025 – Present | Remote
Developed and maintained React Native applications with
•

Skills real-time voice/​video calling, streaming functionality, and
custom native integrations.
Frontend & Mobile: Worked on a multi-application architecture with shared
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React, React Native, Next.js, modules and release workflows using Expo Prebuild and EAS.
TypeScript Designed and implemented backend services, REST APIs, and
•

integrations for mobile and web applications.
Backend: Improved application stability and performance by debugging
•

Node.js, NestJS, Fastify, REST APIs, production issues, optimizing real-time flows, and handling
GraphQL edge cases related to permissions, push notifications, and
background execution.
Realtime & Streaming Managed production releases across multiple branded
Agora, WebRTC, WebSockets,
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applications and participated in architecture and technical
Socket.io, FFmpeg, HLS Streaming decision-making.
Infrastructure Middle Full-Stack Developer
PostgreSQL, Redis, MongoDB, AWS, CI/​ 11/2024 – 04/2025 | Remote
CD Developed an offline-first mobile application with local
•

caching, synchronization, and PDF generation features.
AI & Automation:
Extended the mobile application to desktop using Electron
Cursor, Claude Code, OpenAI APIs,
•

while reusing shared business logic across platforms.
Codex, Prompt Engineering, AI-
Worked with REST APIs, state management, and performance
assisted Development, Workflow
•

optimization across mobile and desktop environments.
Automation, AI-powered Debugging,
Technical Documentation Generation, Junior Front-end Developer
Developer Productivity Automation 10/2023 – 10/2024 | Remote
Developed and maintained web applications using React and
Languages
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Next.js.
Implemented dynamic UI logic, analytics integrations, and
English
•

state management features.
B2
Improved application performance and user experience
•

German through rendering optimizations and frontend refactoring.
B2
Interests
Ukrainian
Native Building side projects AI tools & automation
Mobile architecture