Руслан

<div align="center">
<img src="banner.png" alt="Ruslan Rosbitskyy Banner" width="100%">

# Ruslan Rosbitskyy
### Fullstack & Security Engineer | Web Architecture | Low-level Systems

[]([open contact info](look above in the "contact info" section)
[](https://github.com/rosbitskyy)
[](https://x.com/rosbitskyy)
</div>

---

## 🚀 About Me / Про мене

**[EN]** Backend & AI-focused developer building scalable systems, high-performance security tools, and modern web applications. Expert in low-level network filtering and automated deployment architectures.

**[UA]** Бекенд-розробник та спеціаліст з мережевої безпеки. Створюю відмовтійкі системи, високопродуктивні інструменти захисту (WAF) та сучасні веб-застосунки. Спеціалізуюся на низкорівневій фільтрації трафіку та автоматизації розгортання.

---

## 🛠️ Core Expertise / Ключові компетенції

### 🛡️ Security & Low-level (Go)
- **Low-level Network Filters**: Deep packet inspection, traffic analysis, and filtering at scale.
- **WAF Development**: Building custom WAF solutions (AeroGuard, Antigravity-L7).
- **JA4 Fingerprinting**: Implementation of advanced client fingerprinting for bot detection.
- **Cloaking Solutions**: Development of advanced traffic redirection and cloaking engines.

### 🌐 Backend & Fullstack
- **Frameworks**: Node.js (NestJS, Fastify), Java (Spring, Grails), .NET.
- **Frontend**: React, Next.js (SSR/SPA), MUI.
- **Distributed Systems**: Microservices architecture, Event-driven systems (EventBus).
- **Databases**: MongoDB, PostgreSQL, Redis, MSSQL.

### 🚢 Infrastructure & Automation
- **Orchestration**: Docker Swarm (Global/Host modes), PM2.
- **Deployment**: Railway, Coolify, automated scaling, and service updates.
- **Integrations**: Hestia, Keitaro, Cloudflare API, digital signatures (Java-based).

---

## 🌟 Featured Projects / Основні проекти

### [AeroGuard & Antigravity-L7](https://github.com/rosbitskyy/AeroGuard)
> **Advanced WAF & Anti-Bot Proxy (Go)**
- High-performance security proxy featuring JA4 fingerprinting and header consistency checks.
- Docker Swarm deployment with real-time bot mitigation.
- **Tech**: Go, Redis, Docker Swarm, JA4.

### [Domain Orchestrator](https://github.com/rosbitskyy/MyBoard)
> **Domain Management & Automation Suite**
- Comprehensive solution for domain registration management and Cloudflare automation.
- Automated security setup, NS configuration, and content publishing to target servers.
- **Tech**: NestJS, Next.js, Cloudflare API.

### [Cloaking Solution](https://github.com/rosbitskyy/cloaking)
> **Advanced Traffic Filtering**
- Proprietary cloaking engine for traffic isolation and advanced bot protection.
- **Tech**: Go, JavaScript/TypeScript.

### [Microservices Ecosystem](https://github.com/rosbitskyy/past-and-present-projects)
- Distributed architecture with 10+ microservices managed by PM2.
- Custom Java encryption service for qualified digital signatures.
- **Tech**: Node.js, Fastify, Java EE, PostgreSQL.

---

## 📱 Mobile Experience
- **Android**: Developed taxi service applications and specialized tools (Trade Agent).
- **Cross-platform**: Experience with React Native and Titanium SDK.

---

## 📊 GitHub Stats

<div align="center">
<img src="https://github-readme-stats.vercel.app/api?username=rosbitskyy&show_icons=true&theme=tokyonight"; alt="GitHub Stats">
<img src="https://github-readme-stats.vercel.app/api/top-langs/?username=rosbitskyy&layout=compact&theme=tokyonight"; alt="Top Languages">
</div>

---

## 📫 Connect with me / Зворотній зв'язок

- **LinkedIn**: [Ruslan Rosbitskyy]([open contact info](look above in the "contact info" section)
- **X (Twitter)**: [@rosbitskyy](https://x.com/rosbitskyy)
- **Projects**: [Check out my repositories](https://github.com/rosbitskyy?tab=repositories)

---
<div align="center">
<i>Building the future of secure and scalable web architecture.</i>
</div>