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Achievements

Achievement: Pull Sharkx4Achievement: Pair Extraordinairex3Achievement: YOLOAchievement: QuickdrawAchievement: Galaxy Brainx2Achievement: Arctic Code Vault Contributor

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Kourin1996/README.md

Hi 👋 I'm kourin

Blockchain Protocol Engineer | Ethereum L2 & OP Stack | Consensus, EVM & ZK | Rust, Golang, Solidity

I write about blockchain protocol internals on kourin.jp. Feel free to stop by and explore.

Connect with me:

About me

  • Blockchain Protocol engineer specializing in EVM compatible blockchain and Ethereum Layer 2 infrastructure.
  • Previously at cLabs, I worked on the Celo L2 protocol — contributing to the mainnet launch of Celo's migration from an L1 to an Ethereum L2 using the OP Stack, and building zk-enabled rollup upgrade paths.
  • Previously at Polygon Labs, I was a core contributor to Polygon Edge, implementing the IBFT 2.0 BFT consensus engine, EVM execution layer, and networking components in Golang.
  • I hold a PBA-X (Polkadot Blockchain Academy) certification (Mar 2026) and have completed ZK-focused programs including zkEVM and ZK Bootcamp.
  • 7/7 hackathon prize winner across ETH Global and other Web3 events.

What I Work On:

  • L2 Protocol Development — OP Stack-based chain architecture, sequencer, derivation pipeline, fault proofs
  • Consensus & Execution — BFT consensus, EVM internals, state management, block production
  • Zero-Knowledge — zkEVM, ZK fault proofs, rollup proof systems
  • Networking & Infrastructure — libp2p, peer discovery, devnet/testnet orchestration

Specialties: Blockchain Development | Cross-chain Interoperability | Smart Contract Development | Distributed Systems | System Architecture | EVM-Compatible Blockchain | Stakeholder Engagement | Cryptography

Languages and Tools I Use:

Rust Go TypeScript Node.js Docker Kubernetes PostgreSQL AWS GCP React HTML5 CSS3

Pinned Loading

  1. celo-org/optimism celo-org/optimism Public

    Forked from ethereum-optimism/optimism

    Optimism is Ethereum, scaled.

    Go 22 11

  2. celo-org/op-geth celo-org/op-geth Public

    Forked from ethereum-optimism/op-geth

    Go 16 15

  3. 0xPolygon/polygon-edge 0xPolygon/polygon-edge Public archive

    A Framework for Building Ethereum-compatible Blockchain Networks

    Go 1.1k 573

  4. rust_playground rust_playground Public

    Rust

  5. rust-simple-gossip rust-simple-gossip Public

    Rust

  6. revm_playground revm_playground Public

    Solidity