J4X

J4X

@J4X98

100

Spearbit

sr

Public earnings

$161,539.70

12th


Public findings

103


Achievements


Worked with

Berachain
Drips
deadrosesxyz
Sujith S
xiaoming90
0xicingdeath

Biography

Intro

I'm a smart contract security researcher with a background in computer science. I have 3 years of experience in the smart contract security field, initially from an academic and CTF perspective and later as a smart contract auditor. Before auditing smart contracts, I studied Information Security (Cybersecurity) and worked as a penetration tester.

During my first year in smart contract security, I won six security contests, four top-three placements, and four more top-10 placements. I'm highly interested in decentralized finance, as I've always been interested in traditional finance. I am proficient in auditing code in Solidity, Solana, Cosmos, Cairo, and Substrate.

I am currently working as a Security Researcher at Spearbit, Zenith and Blackthorn. I also compete in contests on Code4rena and Cantina.

Top Contest performances

PlatformContestLanguagePositionPayoutReport
CantinaCentrifugeRust / Substrate🥇/231$70,209.75Private
CantinaWormholeSolidity🥇/13RedactedPrivate
Hats FinanceMetromRust / Backend🥇/X$28,000.00Private
C4HydraDxRust / Substrate🥇/27$23,597.20Report
CantinaGrassRust / Solana🥇/197$6,355.65Private
CantinaDecentSolidity🥇/193$1,250.00Private
CantinaMorphoSolidity🥉/22$17,919.95Private
SherlockAndromedaRust / Cosmos🥉/122$12,998.29Report
CantinaYOLO GamesSolidity🥉/250$2,238.22Private
C4ENSSolidity🥉/54$1,840.73Report
CantinaOptimismSolidity5/227$4,326.86Report
CantinaRoninSolidity6/61$16,809.33Private
CantinaTensorRust / Solana6/256$9,529.84Private
C4CentrifugeSolidity6/84$1,663.90Report
CantinaOpalSolidity6/42$1,780.65Private
CantinaSolayerSolana7/306$2,074.80Private

Private Audits

DateDurationAgencyNameLanguageProtocol typeReport
04/20245 daysThesis DefenseAcreSolidityGnosis SafeReport
04/202412.5 daysThesis DefenseMezoSolidity*Report
05/20245 daysThesis DefenseStars ArenaSolidity*Private
07/20243.5 daysSpearbitDripsSolidityReward distributionReport
09/20245 daysSpearbitBerachainSolidityBalancer forkPrivate
10/20242 daysZenithJupiterSolana / RustSmart walletPrivate
10/20244 daysZenith4realSolana / RustStakingReport
10/20241.5 daysZenithJupiter #2Solana / RustSmart walletPrivate
11/202418 daysBlackthornGMXSolana / RustAMMReport
11/20241 daysZenithJupiter #3Solana / RustSmart walletPrivate
12/20243 daysSpearbitBlendySolana / RustVaultPrivate
12/20243 daysZenithAutonomous FinanceSolana / RustVaultPrivate
12/20245 daysSpearbitBlendy #2Solana / RustVaultPrivate
01/202520 daysPlainshiftEkuboCairoAMMPrivate
02/202518 daysZenithPaladinSolana / RustStaking / Governance / RewardsPrivate
03/20255 daysZenithDripsterSolana / RustLaunchpadReport
03/20255 daysZenithOrderlySolana / RustBridgePrivate
03/20252 daysZenith1InchSolana / RustOrderbook AMMReport
03/202510 daysZenithMeteoraSolana / RustBonding CurvePrivate
04/20256 daysZenithEgoSolana / RustLaunchpadReport
04/20251 daysZenithBridgeSolana / RustPaymentPrivate
04/20253 daysBail SecurityToken MillSolana / RustLaunchpadPrivate
04/20253 daysZenithMeteora #2Solana / RustBonding CurvePrivate
04/202512.5 daysSpearbitBerachainNode / GoBeaconkitPrivate
05/20250.5 daysZenithMeteora #3Solana / RustAMMPrivate
05/202510 daysZenithMeteora #4Solana / RustAMMReport
06/20258 daysSpearbitErgoniaSolana / RustAMMPrivate
07/202522 daysZenithMeteora #5Solana / RustAMMPrivate
08/20251 daysZenithMeteora #6Solana / RustAMMPrivate
08/202515 daysZenithVesuCairoNAPrivate
08/20255 daysZenithVesu #2CairoNAPrivate
09/20254 daysZenithForgeCairoNAPrivate
09/20250.5 daysZenithMeteora #7Solana / RustAMMPrivate
09/20250.5 daysZenithMeteora #8Solana / RustAMMPrivate
09/20253 daysZenithMeteora #9Solana / RustAMMPrivate
10/20252 daysZenithMeteora #10Solana / RustFee SharingPrivate
10/20255 daysZenithStarknet FoundationCairoAlexandria Bytes LibraryPrivate
10/202518 daysZenithStarkware IndustriesCairoCairoPrivate

vCISO/Consulting

DateAgencyNameLanguageProtocol type
10/2024SpearbitZetachainSolidityBlockchain
06/2025SpearbitErgoniaSolana / RustAMM

Judging

DatePlatformNameLanguageProtocol type
06/2024CantinaUsualSolidityNA
08/2024CantinaZetachainSolana / RustNA
01/2025CantinaInclusive FinanceSolana / RustNA
03/2025CantinaReserveSolana / RustNA

Work experience

Name of the conceptAdditional Info
ERC StandardsERC20, ERC721, ERC4626, ERC4337
Gnosis SafesreNFT, Redacted, Optimism
LendingMorpho, Wildcat Finance, Opal, Balancer
AMMUniswap, Omnipool (Opal, HydraDx), Custom (Salty.io), compound
ProxiesTransparent, UUPS, Diamond
StakingEthena, Salty.io, Redacted
GovernanceENS,Ethena Labs, Opal, Salty.io
Cross ChainWormhole, Axelar, Threshold tBTC bridge, Custom implementations

Top competitions

View all
Contest
Position
Date
Payout
Centrifuge

Centrifuge

1

/ 14

August 2024$70,210
metamorpho-and-periphery

metamorpho-and-periphery

2

/ 33

November 2023$12,357
tensor-monorepo

tensor-monorepo

6

/ 10

October 2024$9,030
grass

grass

1

/ 15

June 2024$6,356
safe-extensions

safe-extensions

5

/ 59

May 2024$4,327

Private reviews

View all
Engagement
Project title
Timeframe
Researchers
Berachain

Berachain

Bera Bex

Sep 2024 - Oct 2024

J4X
xiaoming90
0xicingdeath
Drips

Drips

drips-monorepo

Jul 2024 - Jul 2024

Sujith S
J4X
deadrosesxyz