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Work experience

Senior Full Stack Developer

from 05.2025 to 07.2026 (1 year 3 months)
CryptoScreener, Дистанційно (IT)

An analytical FinTech platform and market data screener with a core focus on low-latency visualization, serving 1,000+ concurrent users (CCU). Developed within a 10-person cross-functional team (2 Full-Stack, 2 Frontend, 4 QA, 2 UI/UX).

I was responsible for migrating mission-critical services from TypeScript to Rust to ensure stable data delivery and uninterrupted chart rendering during periods of high market volatility.

一 Architected and built a high-throughput data collection and aggregation system handling approximately 1 million messages per second at peak, integrating the top 10 cryptocurrency exchanges via WebSocket APIs (JSON, Protobuf) using Kafka and Schema Registry. Successfully migrated streaming data microservices from Node.js to Rust (Tokio). Leveraging Rust's efficient concurrency model, reduced end-to-end data delivery latency from 13–16 seconds to approximately 100 ms, ensuring smooth real-time chart rendering during periods of high market volatility.

一 Reduced the time required to integrate new cryptocurrency exchanges by designing a unified connector framework with AI-assisted boilerplate generation.

一 Established a production-ready observability stack with Sentry, Loki, and Grafana, giving the team real-time visibility into application health and production incidents.

一 Automated deployments using Docker and Docker Compose, enabling reliable and repeatable production releases.

一 Conducted a comprehensive frontend performance audit and optimization, eliminating memory leaks and bottlenecks between data ingestion and rendering. This resolved micro-stuttering on heavily loaded charts and cut RAM consumption in half (from 1.4+ GB down to 700–750 MB) while rendering 50 simultaneously active charts.

Senior Full Stack Developer

from 05.2022 to 01.2026 (3 years 9 months)
Legend Game Studio, Дистанційно (IT)

A game development studio. Worked within the multiplayer mods department for GTA V, managing a peak load of 500+ concurrent users (CCU) per single server. Developed within an 11-person cross-functional team (2 Backend, 1 Frontend, 1 Full-Stack, 2 3D Modelers, 2 Mappers, 2 UI/UX, 1 Game Designer).

Acted as a technical expert on native platform capabilities and game system security while ensuring seamless cross-platform development. Designed, architected, and scaled both backend and frontend systems.

一 Designed an abstraction layer (API contract) to unify codebases between RageMP and alt:V, significantly increasing development velocity and reducing bug resolution time.

一 Implemented asynchronous state synchronization logic and optimized the data streaming pipeline.

一 Developed custom Vite plugins, incorporating cross-platform Hot Module Replacement (HMR) and a selective file routing mechanism via *.{platform}.ts suffixes.

一 Built an event-driven architecture with NATS and JetStream that improved system scalability and fault tolerance while ensuring guaranteed event delivery, retry logic, and DLQ handling.

一 Introduced AI-assisted test generation and automated code review workflows, helping the team deliver features faster while maintaining code quality.

一 Implemented a paid subscription system and engineered seamless integration with multiple payment gateways.

一 Automated CI/CD pipelines with GitLab CI/CD, Docker, and Docker Compose, enabling faster and more reliable software releases.

Backend Developer

from 08.2020 to 05.2022 (1 year 10 months)
SEO100, Дистанційно (IT)

I developed a multithreaded proxy server for an SEO company. The main goals were real-time configuration updates, high performance, and support for specific socket options.

I implemented a fully featured HTTP/S proxy server with support for HTTP/2 and SOCKS4/4a/5/5h protocols. Tokio was used for multithreading, enabling the server to handle several hundred thousand connections even on low-end machines, whereas 3proxy could only handle several tens of thousands under the same conditions.

Frontend Developer

from 01.2020 to 08.2020 (8 months)
Nixdate, Дистанційно (IT)

— I developed the client-side part of a dating platform, including project architecture, user interaction flows, subscription screens, and monetization mechanics.

— Additionally, I helped the backend team with Nginx, CORS configuration, and technical frontend/backend integration decisions.

Frontend Developer & Software Developer

from 05.2019 to 01.2020 (9 months)
Redlix, Дистанційно (IT)

I was responsible for the client-side part built with Electron and Vue.

— Implementing logic for version management, downloading, building, and launching the Minecraft client, as well as adding support for Fabric and Forge mods.

— I implemented a friends and chat system using WebSocket for real-time updates and adding WebRTC-based calls for peer-to-peer communication via STUN servers.

— I built a notification system tailored to the platform on which the launcher was running.

— I researched the Mojang API to support older Minecraft versions, added character and clothing preview functionality using CSS-based 3D rendering of PNG textures, decompiled JAR files to add cape support to the launcher, and configured deployment and application delivery.

Education

ВІННИЦЬКИЙ НАЦІОНАЛЬНИЙ АГРАРНИЙ УНІВЕРСИТЕТ

Факультет економіки, інформаційних технологій та сфери обслуговування, Комп’ютерні науки, Вінниця
Unfinished higher, from 2019 to 2024 (5 years)

Knowledge and skills

• JavaScript
• GitHub
• React
• HTML
• CSS
• Git
• Figma
• TypeScript
• SQL
• SASS
• Node.js
• MySQL
• JQuery
• Redux
• Rust
• Apache Kafka
• Nats
• Tokio
• Sentry
• Vitest
• Vite.js
• Vue.js
• Puppeteer
• Playwright
• Webpack
• Rollup
• ESBuild
• Leaflet
• ReactNative
• Zustand
• Electron
• TailwindCSS
• Redux Toolkit
• MobX
• Pino
• Express.js
• NestJS
• Hyper
• Axum
• Actix Web
• Winston
• Loki
• Grafana
• OTLP
• RabbitMQ
• PostgreSQL
• Redis
• Dragonfly
• Elasticsearch
• Qdrant

Language proficiencies

Ukrainian — fluent