[STATUS: AVAILABLE FOR HIGH-LOAD CONTRACTS & SYSTEMS ARCHITECTURE]

YEVHEN BEREZANSKYI

// SYSTEMS ARCHITECT • FULL-STACK ENGINEER • RUST L2

Engineering microsecond-sensitive cross-DEX arbitrage pipelines in Rust, reverse-engineering protected enterprise web portals, and shipping production SaaS architectures with metered Stripe billing. Zero corporate bloat. Pure engineering.

CORE_RUNTIME Rust (Tokio / Alloy) • Node.js • TypeScript • Next.js
SYSTEMS_INFRA Arbitrum Nitro L2 • Docker • Linux Systemd • Windows Svc
SPECIALTIES High-Frequency Web3 • Reverse Engineering • Metered SaaS
[EXPLORE DOSSIER // CASES] [VIEW RESUME // CV] [INITIATE COMMS]
CALLSIGN: 0xBR1ZZ 46.4825° N, 30.7233° E // ODESA
Yevhen Berezanskyi - Systems Architect & Full-Stack Engineer
VERIFIED ENGINEER // STREETWEAR TECH
SECURITY_CLEARANCE: LEVEL_4 // ROOT ENV: BARE_METAL • NITRO L2
[01] // DOSSIER & RECORD

BACKGROUND & OPERATIONAL PROFILE

OPERATIONAL PHILOSOPHY VERIFIED

I build reliable, high-performance software across the technical spectrum. My core focus sits where low-latency backend engines meet resilient web architectures and automated infrastructure.

From writing microsecond-sensitive cross-DEX arbitrage pipelines in Rust with local Arbitrum Nitro full node synchronization, to reverse-engineering protected enterprise web portals and shipping turnkey SaaS platforms with automated Stripe billing — I engineer systems for determinism, high concurrency, and zero downtime.

I value verifiable metrics: sub-millisecond execution times, resilient auto-restarting daemons under systemd, and zero-maintenance automation pipelines.

BASE_LOCATION Odesa, Ukraine (UTC+2/UTC+3)
ENGAGEMENT Remote • Contract • Full-Time
SYSTEM_PHILOSOPHY Zero Bloat • Hardened Code • Speed
FIELD IDENTITY // VERIFIED HUMAN VERIFIED
Yevhen Berezanskyi - Verified Developer
[ODESA // UA]
CALLSIGN 0xBR1ZZ // Yevhen Berezanskyi
COORDINATES Odesa, Ukraine [46.48° N, 30.72° E]
CORE_COMPETENCY Low-Latency Systems (Rust) • High-Load Web3
DELIVERY_TRACK Arbitrum DEX (48k UAH) • Reverse Proxies • SaaS
VERIFIED_CHANNELS Freelancehunt Top-Rated • GitHub Commits
[PURE_ENGINEERING] [NO_AI_SLOP] [RUST_NITRO] [VERIFIED_CONTRACTS]
CODE_COMPLIANCE 100% Deterministic
UPTIME_TARGET 99.99% Daemons
LATENCY_SLA Sub-Millisecond
FIELD DEPLOYMENTS & MILESTONES 2021 — 2026
  • [2023 — PRESENT]

    Systems & Full-Stack Engineer // Freelance & Contract

    Key deliverables:

    • Designed and delivered a Rust high-frequency cross-DEX arbitrage engine on Arbitrum One (Uniswap V3 / Camelot V3) with local Nitro node sync and microsecond tick decoding.
    • Engineered an enterprise session-sharing reverse proxy on Node.js/Windows Server with real-time bidirectional storage synchronization and auto-healing daemons.
    • Shipped PropText.ai — a production real estate SaaS with automated Stripe billing and Google Gemini API integration.
  • [JUN 2024 — SEP 2024]

    Web Systems Intern // ME "Marine Plast Center"

    Automation of IT systems, internal tools, and enterprise network infrastructure.

  • [JAN 2024 — JUN 2024]

    Full-Stack Intern // Web Developer

    Frontend interfaces, REST API integration, and Agile/Scrum cross-functional delivery.

  • [FEB 2023 — APR 2023]

    Full-Stack Intern // Time Pro

    API endpoints development, database querying, and client-side optimization.

  • [JAN 2021 — MAY 2021]

    Junior Technician // Odesa College

    LAN administration, hardware diagnostics, and Linux/Windows maintenance.

ACADEMIC FOUNDATIONS & COMPETENCIES CS & IT
  • [2023 — 2024]

    Odessa National University named after I. I. Mechnikov

    Information Technologies & Software Systems — Advanced algorithms, distributed computing, and software verification.

  • [2021 — 2023]

    Odessa State Ecological University

    Computer Science & Information Technology — Database theory, computer systems, and computational methods.

  • [2017 — 2021]

    Odessa Faculty College of Computer Technologies

    Computer Engineering, Networks & Hardware Architecture — LAN administration, packet routing, and hardware diagnostics.

CORE ENGINEERING SPECIALTIES:
// Low-Level Systems: Tokio async runtime, non-blocking I/O, cache-friendly data structures, zero-copy serialization.
// Network Architecture: Full-duplex WebSocket streams, TLS session proxies, HTTP/2 multiplexing, anti-bot mitigation.
// Web3 Engineering: EVM transaction decoding, Arbitrum Nitro state machine, microsecond mempool synchronization.
[02] // ARSENAL & TOOLCHAIN

TECHNICAL STACK & CAPABILITIES

01 // HIGH-PERFORMANCE & SYSTEMS HARDCORE
Rust (2021) Tokio Async Alloy Primitives Arbitrum Nitro Node Linux / Ubuntu 24.04 Systemd Supervision Docker Socket Programming Reverse Engineering U256 Fixed-Point Math
02 // FULL-STACK & WEB ENGINES PRODUCTION
TypeScript Next.js (App Router) React Node.js (Express) Django REST PostgreSQL Prisma ORM Supabase Tailwind CSS Vercel
03 // REVERSE ENGINEERING & AI AGENTS INFRA
Autonomous Agents VM Sandbox Isolation Puppeteer Core Anti-Bot Persistence Gemini / Claude API 5-Key Rotation Pool Prompt Engineering RAG Architecture Telegram Bot API
04 // SECURITY, BILLING & OPERATIONS DEPLOY
JWT Authentication Session Sync & Conflict Res. Stripe Subscriptions Metered Billing Zod Validation GitHub Actions CI/CD Nginx & SSL Git
[03] // PRODUCTION CASES

SYSTEMS DOSSIER & DELIVERABLES

CASE // 01
[STATUS: DELIVERED & PAID]
HIGH-FREQUENCY TRADING • RUST L2

Arbitrum DEX Arbitrage & Nitro Node Engine

High-performance cross-DEX arbitrage execution system designed for Uniswap V3 and Camelot V3 (Algebra) on Arbitrum One L2. Decodes live pool tick events over WebSocket streams with microsecond latency, tracks tick-level liquidity in an in-memory state machine, and evaluates round-trip arbitrage paths factoring L2 gas costs and fixed-point U256 math. Deployed alongside a dedicated Arbitrum Nitro full node on Hetzner Linux with systemd supervision.

TICK_DECODER Microsecond WebSocket Stream
NODE_SYNC Arbitrum Nitro Dedicated Node
ARITHMETIC U256 Fixed-Point (Alloy)
Rust (2021) Alloy Primitives Tokio Docker Systemd Uniswap V3 Camelot V3
// 5/5 STAGES COMPLETED & VERIFIED
CASE // 02
[STATUS: LIVE IN PRODUCTION]
PRODUCTION SAAS • ACTIVE USERS

PropText.ai — Real Estate Listing Generator

Commercial SaaS application for generating structured, high-converting real estate listing descriptions. Built with Next.js App Router and deployed on Vercel. Features Supabase authentication, automated credit-based metered billing with Stripe checkout and webhook processing, and Google Gemini API integration for localized text generation.

BILLING_MODEL Credit-Based Metered Stripe
AUTH_STORAGE Supabase Auth & PostgreSQL
DEPLOYMENT Production Vercel Cloud
Next.js TypeScript Stripe API Google Gemini API Supabase Tailwind CSS
VIEW LIVE PLATFORM
CASE // 03
[CLIENT SHOWCASE // SWEDEN]
ENTERPRISE PROTOTYPE • SWEDISH ECOSYSTEM

Subwerk CRM — Prototype & Custom Design System

Interactive web prototype and custom design system engineered for a Swedish CRM platform serving moving and cleaning enterprises. Built with zero runtime frameworks for 60 FPS performance. Implements live CRM dashboards, Stockholm market RUT-avdrag tax deduction calculations, Bankgiro invoicing simulation, and full responsive mobile adaptation.

TAX_CALCULATION Swedish RUT-avdrag Engine
RUNTIME_OVERHEAD Zero Framework • 60 FPS
RESPONSIVE_BREAKS 5 Distinct Breakpoints
HTML5 Custom CSS Design System Vanilla JavaScript Lucide Icons Vercel
VIEW LIVE PROTOTYPE
CASE // 04
[REVERSE ENGINEERED // DEPLOYED]
REVERSE PROXY • ENTERPRISE PORTAL

Partslink24 Multi-User Session Sharing Reverse Proxy

Specialized Node.js reverse proxy engine designed to bypass single-session restrictions on protected enterprise web portals with Envoy proxy and React JWT auth. Features real-time bidirectional cookie & LocalStorage state synchronization (/__sync_storage), millisecond timestamp conflict resolution to prevent race conditions, header sanitization, and automated Windows Server daemon self-healing via scheduled tasks.

STATE_SYNC Bidirectional Cookie / LocalStorage
RACE_CONDITION_FIX Timestamp Conflict Resolution
HEADLESS_DAEMON Windows Server Self-Healing
Node.js Express Http-Proxy-Middleware Windows Server 2019 PowerShell
VIEW REPOSITORY
CASE // 05
[INFRASTRUCTURE // ACTIVE ORCHESTRATION]
AGENT INFRASTRUCTURE • VM SANDBOX

OpenClaw — Autonomous AI Agent Orchestrator

Automation infrastructure framework for running autonomous AI agent sessions in isolated VM sandboxes. Implements automated pooling and rotation across 5 Google Gemini API keys to bypass rate limits, persistent anti-detection browser profile binding, structured Winston logging, and a standalone React/TypeScript telemetry dashboard with live tool execution tracking.

KEY_ROTATION 5-Key Gemini API Pool
SECURITY_MODEL Isolated VM Sandbox
OBSERVABILITY React Telemetry Dashboard
Node.js TypeScript Puppeteer Core React (Vite) Winston Gemini API
VIEW REPOSITORY
// COMPACT SYSTEMS, SCRAPERS & UTILITIES
CASE // 06

Freelance Intelligence Scrapers

Automated scraping suite monitoring Freelancehunt and Djinni job boards with Puppeteer and Cheerio. Evaluates project match scores, drafts customized outreach proposals via Gemini API, and dispatches real-time Telegram push alerts.

Node.js • Puppeteer • Cheerio • Telegram API • Gemini API
[VIEW REPOSITORY]
CASE // 07

Commercial E-Shop Platform

Full-stack e-commerce system with decoupled React frontend and Django REST backend. Features secure JWT authentication, relational product filtering, shopping cart state management, and PostgreSQL persistence.

React • Django REST • PostgreSQL • Tailwind CSS
[VIEW LIVE DEMO]
CASE // 08

Invoice Processing System

Document intelligence application extracting structured financial data from PDF invoices and receipts via Google Gemini API in background workers, featuring a context-aware document chat assistant.

React • Express.js • Prisma ORM • SQLite • Gemini API
[VIEW REPOSITORY]
CASE // 09

Bank Statement Analyzer

Interactive web application for parsing and auditing CSV bank statements. Features drag-and-drop ingestion, transaction search, strict Zod schema validation, balance calculations, and Vitest unit testing.

Next.js • PapaParse • Zod • Vitest • Tailwind CSS
[VIEW REPOSITORY]
[04] // DIRECT COMMS CHANNEL

INITIATE TECHNICAL COMMS

SECURE COMMS RELAY CHANNEL: OPEN

Available for high-throughput backend architecture, high-frequency Web3/DEX engines, turnkey SaaS platforms, and resilient automation infrastructure. Reach out directly:

TELEGRAM @eugene_br1zz
WHATSAPP +40 750 266 672
GITHUB github.com/Br1zz1713
CURRICULUM_VITAE View Resume // EN & UA
FREELANCEHUNT berezanskyi09 // Top Rated
nyavochka-daemon:
"All comms encrypted. 0 lost ticks in mempool. Ready for production deploys." [01/07] 🐾
ODESA, UKRAINE [UTC+2 / UTC+3] +40 750 266 672 REMOTE WORLDWIDE