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@cruujon
cruujon
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Keita Kuroiwa cruujon

Founder of Flovia
  • Founder of x402 projects
  • San Francisco, US
  • 03:14 (UTC -07:00)
  • X @cruujon
  • LinkedIn in/cruujon

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cruujon /README.md

πŸ› οΈ Tech Stack

Solidity TypeScript React Next.js Node.js Docker Ethereum

Validator

Expertise

  • Agent Evaluation & ML: behavioral simulation, impact evaluation, causal inference, experimentation, attribution
  • Agent Infrastructure: API/MCP discovery, selection, execution, agent analytics
  • Machine Payments: x402, stablecoins, pay-per-use APIs, machine-to-machine commerce
  • Attestation & Verification: cryptographic attestations, signatures, provenance, credentials
  • Ethereum Infrastructure: staking, DVT, MEV, execution/consensus clients

Tech Stack

  • Ethereum ×ば぀ Agents: x402, ERC-8004, ERC-8183, ERC-8126, ERC-8021
  • Ethereum Infra: Geth, Nethermind, Lighthouse, Teku, Nimbus, mev-boost
  • Smart Contracts: Solidity, Foundry, Hardhat
  • Backend / Data: Python, Node.js, TypeScript, REST/GraphQL
  • Frontend: Next.js, React, wagmi/viem
  • Infra: Docker, Ansible, GitHub Actions

Other Experience

  • Ethereum Foundation Builder Fellow
  • OpenAI Startup Competition Winner
  • Stripe Agentic Commerce Competition Winner
  • ×ば぀ global hackathon winner
  • Obol Staking Master β€” Selected as 1 of 7 worldwide from thousands of applicants; researched Ethereum staking and DVT
  • Lecturer, Hashed Protocol Camp β€” Taught blockchain infrastructure and protocol development to early-stage founders
  • External Judge, Crecimiento Startup World Cup
  • 3+ years in crypto/AI venture R&D & incubation across blockchain infrastructure, machine payments, cryptography, verification, and technical mentorship

πŸ”— Links

Personal: @cruujon

πŸ“Š GitHub Stats

GitHub Streak

Profile Summary

GitHub Activity

Repository Stats


Building Ethereum infrastructure that's resilient, credible, and builder-friendly β€” one validator at a time.

Pinned Loading

  1. SubsidyPayment SubsidyPayment Public

    Rust 1 2

  2. StakeHumanSignal/StakeHumanSignal StakeHumanSignal/StakeHumanSignal Public

    Humans stake USDC on AI evaluation quality. Agents pay via x402 to access ranked verdicts. Winners earn Lido wstETH yield. 10 tracks β€” ERC-8183, ERC-8004, Lido MCP, Filecoin FOC, Olas, OpenServ, x402.

    TypeScript

  3. arg25-Projects arg25-Projects Public

    Forked from invisible-garden/arg25-Projects

  4. Secret-Knowledge-Inheritance-Protocol Secret-Knowledge-Inheritance-Protocol Public

    this repo is for Stellar Hackathon 2025.

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