Ростислав

Rostyslav Betsyshen
Backend Developer | Go & Node.js | Real-Time Systems
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | github.com/tokyobladee | Lviv, Ukraine

PROFESSIONAL SUMMARY
Backend Developer with 1.5+ years of experience designing and owning production real-time systems in Go and
Node.js. Built the end-to-end architecture of a multiplayer backend supporting around 100 concurrent player
connections, including WebSocket infrastructure, matchmaking, REST APIs, and authentication. Brings 3+ years of
Unity experience and a practical understanding of client-server architecture for mobile multiplayer products.

WORK EXPERIENCE
Evolute Studio
Backend Developer Aug 2024 - Mar 2026
Owned backend architecture, implementation, and production operations as the sole backend developer for a real-
time multiplayer system serving approximately 100 concurrent players in production.
Migrated the production WebSocket service from Node.js to Go while redesigning connection and session lifecycle
management.
Built real-time matchmaking and session orchestration for player assignment, lifecycle management, and server-
side game-state synchronization.
Designed and implemented authenticated REST APIs for player data, session management, and server-side game
operations.
Designed PostgreSQL schemas and production migrations for player, session, and match data.
Established automated testing, logging, and monitoring; containerized and deployed production services with
Docker.
Technologies: Go, Node.js, PostgreSQL, Docker, WebSockets, REST APIs, authentication, automated testing,
monitoring

AWARDS
Best Mobile Game - DevGamm Vilnius 2023, Gravitation.io (Evolute Studio)
Winner - Mammothon 2025 by Celestia, Evolute Kingdom: Mage Duel (Evolute Studio)

SKILLS
Backend: Go, Node.js, Python, Java, Flask, WebSockets, REST APIs, Authentication
Database & DevOps: PostgreSQL, Docker, DigitalOcean, Vercel
Quality & Operations: Automated Testing, Logging, Monitoring, Git, CI/CD
Additional: Unity, C#, Netcode, Firebase
Frontend: React, JavaScript, TypeScript, Tailwind CSS, CSS
Languages: English (B2), Ukrainian (Native), Russian (Native)

EDUCATION
Bachelor's Degree in Economics Sep 2022 - Jul 2026
National Academy of Statistics, Accounting and Audit