Jiri123

Jiri123

Interested in DeFi (Uniswap V4 hooks), Solana program, and Cosmos SDK appchains.

@Jiri123

100

Spearbit

sr

resident

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Public earnings

$91,829

94th

Public findings

38

Achievements

Skillset

Self-reported

Admin verified

Account Abstraction & Wallets

Intents / SolversMultisig (Safe)Social Recovery

Blockchain Platforms (L1 + VM)

CosmosEthereumEVMSolana

Consensus & Node Infra

Consensus (PoS / BFT)Execution Clients (Geth)

Cross-Chain & Interoperability

Cross-Chain BridgesMessaging Protocols (LayerZero/CCIP/Wormhole)

Worked with

Forest Road
Coinbase
slowfi
Valerian Callens
OverviewPublic reviewsPrivate reviews

Biography

Introduction

I have a background in System Hacking and Reversing. In 2022, I ventured into Web3 security, and over the past three years, I have actively participated in many audit competitions as well as conducted private audits. While my main area of interest lies in Solidity security (recently Uniswap V4 hooks), I have recently been analyzing appchain codes written in Rust and Go.

Notable Achievements (Private Audit)

TitleCustomerNote
Mitosis auditMitosisAudited the Mitosis appchain
Ethrunes audit 1,2EthrunesAudited Ethrunes LaunchSwap contracts
Dankkicks auditDankkicksAudited Dankkicks lottery contracts
Kongu security reviewKonguAudited Kongu staking contract and backend service

Notable Achievements (Audit Competition, Bug bounty)

TitlePlatformNote
🥇 LayerXCantina1st Place, Found 11 High, 3 Medium, Private
🥈 UsualCantina2nd Place, Found 1 High, Private
BlastCantinaFound 1 High in blockchain core
Story Bug bountyCantinaFound Critical bug
TensorCantinaFound 1 High
Pancakeswap Bug bountyImmunefiFound Med-High bug

Top competitions

View all
Contest
Position
Date
Payout
Blast

Blast

33

/ 97

January 2024$8,766
Clementine

Clementine

5

/ 11

August 2025$2,452
telcoin-network

telcoin-network

11

/ 92

June 2025$1,506
tensor-monorepo

tensor-monorepo

9

/ 10

October 2024$1,241
farcasterattestation-monorepo

farcasterattestation-monorepo

17

/ 36

January 2025$1,070

Private reviews

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Engagement
Project title
Timeframe
Researchers
Forest Road

Forest Road

Forest Road: Vault

Aug 2026 - Aug 2026

Jiri123
Valerian Callens
Coinbase

Coinbase

Coinbase: custom-stablecoin

Jul 2026 - Jul 2026

Jiri123
slowfi

Security portfolio

Title
Description
Story Protocol Bug Bounty ($75K)Critical bug in Validator
PancakeSwap Bugbounty ($10000)Med-High bug in MasterChef