Contact — Freelance AI & Web3 Developer
Open to AI agent workflows, smart contract work, bot architecture, and DeFi builds.
About this page
To hire checkra1n for freelance work, contact him on Farcaster (@checkra1n), Telegram (t.me/checkra1ndev), Threads (@checkraindev), GitHub (checkra1neth), or X (@checkra1neth). He accepts AI coding and vibe coding consulting (Claude Code, Cursor agent setup), smart contract development, DeFi protocol work, and trading bot architecture. He works remotely from Ukraine in English and Ukrainian. Response channels are listed at checkra1n.dev/signal alongside an FAQ for availability and tech scope.
Location: Ukraine (remote) | Focus: Solidity, DeFi, AI agents, trading bots
Stats
- 15+ years in crypto (since 2011)
- Languages: Python, TypeScript, Swift, Rust, Solidity
- Platforms: Web Apps, Browser Extensions, Telegram Bots, CLI, AI Agents
Backstory
Crypto native with mainnet deployments across DeFi, prediction markets, and AI security tooling. Production experience with Uniswap v4 hooks, Polymarket automation, and Claude-assisted audit workflows.
Timeline
Skills
- DeFi / Web3: 92/100
- AI Integration: 78/100
- Automation: 88/100
- Trading Bots: 75/100
Platforms: Web Apps, Browser Extensions, Desktop (Mac), Telegram Bots, CLI Tools, AI Agents
Frameworks: React, Next.js, Scaffold-ETH, Vite, FastAPI, Tauri
Projects
- SENTINEL — Self-Funding Security Oracle on X Layer. Monitors tokens, publishes on-chain verdicts. (GitHub)
- DOSSIER — On-chain wallet intelligence agent. 14 commands — analytics, token actions, monitoring. (GitHub)
- XBIRD — Twitter/X integration system + MCP skill for AI agents. Core API for Claude Code, Cursor, Windsurf. (GitHub)
- FANOVO — Uniswap v4 hooks-based prediction market and fantasy sports protocol on X Layer. (GitHub)
- POLYMARKET BOT — Rust-based Polymarket trading suite. Arbitrage bot + hedged pairs with mathematical risk controls.
- CHECKRA1N-AUDIT — AI-powered smart contract security auditor. Slither + Aderyn + LLM reasoning.
- MEXC FUTURES BOT — Automated MEXC futures trading bot with 200x leverage. Python-based position management.
- CLAUDE BRAIN — Simple Claude brain implementation in Rust. Memory and context management for AI agents.
Mission
- Architect autonomous AI agents that build, audit, and trade onchain
- Interests: MEV, intent-based architectures, AI-driven security research
- Business: SaaS automation, smart contract audits, AI consulting
- Networking: Open to collaborations on Web3 + AI intersection
Links
GITHUB | TELEGRAM | THREADS | FARCASTER | TWITTER / X
FAQ
What is vibe coding?
Vibe coding is a development workflow where you describe intent and AI agents (Claude Code, Cursor) write the code. You direct agents with specs and reviews instead of typing every line. See checkra1n.dev/intel/vibe-coding-agents for a real example.
What is an AI agent in software development?
An AI coding agent is an LLM-powered tool that reads your codebase, executes multi-step tasks, and writes files — like Claude Code CLI or Cursor Agent mode. checkra1n built a 7-stage blog pipeline using Claude Code agents.
What technologies do you work with?
Claude Code, Cursor, Solidity, Rust, TypeScript. AI-native development plus onchain systems — smart contracts, trading bots, audit pipelines.
Are you available for freelance or contract work?
Always open to interesting collaborations — vibe coding consulting, Web3 contracts, bot architecture. Contact via Farcaster, Telegram, or GitHub.
What is your experience with crypto and blockchain?
15+ years in the space. Built Uniswap V4 hooks, Polymarket trading bots in Rust, AI smart contract audit pipelines, and onchain automation — now shipped primarily via AI agent workflows.
Do you speak English or Ukrainian?
Both. Bilingual developer — blog content is published in English and Ukrainian.
What projects are shown in the portfolio?
AI agent projects (7-stage Claude Code blog pipeline, XBIRD MCP skill), Polymarket bots, Uniswap V4 hooks, MEXC futures bots, and AI audit tools.
Latest Blog Posts
- AI Level Zero — Complete Beginner Guide to ChatGPT & Prompts — Zero to AI in one guide: pick your first chatbot, understand the interface, write better prompts, avoid 20 rookie mistakes, and try 10 hands-on exercises.
- AI Рівень 0 — повний гайд для початківців — Від нуля до AI: обери перший чатбот, зрозумій інтерфейс, пиши кращі промпти, уникни 20 типових помилок і спробуй 10 практичних вправ.
- Що таке Vibe Coding? — Що таке vibe coding з AI? Практичний гайд: як я збудував блог-систему через Claude Code агентів — нуль ручних натискань.
- AI Pair Programming з реальними грошима на кону — Як 20 сесій Claude та 80 перезапусків бота створили торгову систему для Polymarket. Реальна історія AI-розробки коли кожен баг коштує справжніх доларів.
- From X Layer Hackathon to Base Mainnet — How we rebuilt Fanovo tokenomics for Base: sale-first liquidity, Chainlink VRF packs, and UUPS upgradeable contracts — 18 Cursor sessions later.
- Three Bugs That Nearly Killed Our Web3 Hackathon Project — CORS, commit-reveal race conditions, and Map size exceeded — surviving a 10-day hackathon on X Layer with Uniswap V4 hooks.
- Debugging a 200x Leverage Bot When the Numbers Do Not Add Up — How I spent 3 days debugging PnL discrepancies in a MEXC futures bot. Real money, real trades, and a single wrong assumption that broke everything.
- I Built a 7-Stage Blog Pipeline with Claude Code — Build a 7-stage blog pipeline with Claude Code skills. From topic to published post with translations, SEO, and Telegram announcements.
- Claude as Copilot for Live Trading — How I use Claude Code as a copilot for live trading bot development. Real-time debugging, architecture decisions, and shipping faster.
- What Is Vibe Coding? — What is vibe coding with AI? A practitioner guide: how I built an entire blog system with Claude Code agents — zero manual keystrokes.