Jonatas Martins

Jonatas Martins

Hacking - Breaking - Learning

@jonatascm

100

Spearbit

asr

resident

Public earnings

$19,517.17

143rd


Public findings

59


Achievements


Skillset

RWAStakingSolanaMulti ChainsLendingCross ChainBridgesDeFiSyntheticsSolidityRustYield Farm

Worked with

AFI
infiniFi
Cod3x
NashPoint
Uniswap
MakerDAO
cccz
m4rio
Christoph Michel
Gerard Persoon
cergyk
r0bert

Biography

I’ve been working as a Security Researcher at Spearbit since 2022. My background as a Web2 web/mobile developer helped me transition into blockchain security, where I’ve focused on identifying vulnerabilities and improving the security of diverse projects, including Uniswap, Maple, Coinbase, Maker, Centrifuge, and others.

Most of my work is around DeFi protocols, primarily in Solidity, but I’ve recently added Rust to my skillset. In 2024, I also worked as a judge for Cantina and currently act as a triager for Cantina’s bug bounty programs.

Here are some of my previous contributions:

Top competitions

View all
Contest
Position
Date
Payout
velvet-v4

velvet-v4

4

/ 33

February 2025$5,202
genius-contracts

genius-contracts

3

/ 18

July 2025$2,131
grass

grass

3

/ 15

June 2024$1,882
Blast

Blast

43

/ 97

January 2024$1,098
inclusive-monorepo

inclusive-monorepo

4

/ 15

January 2025$1,096

Private reviews

View all
Engagement
Project title
Timeframe
Researchers
Velodrome

Velodrome

Velodrome

Sep 2025 - Sep 2025

Jonatas Martins
Liam Eastwood
AFI

AFI

AfiUSD

Jul 2025 - Jul 2025

Jonatas Martins
chris
infiniFi

infiniFi

DeFi Security Review: InfiniFi Protocol Audit

Mar 2025 - Mar 2025

+1
r0bert
noah.eth
Jonatas Martins
Cod3x

Cod3x

Astera

Dec 2024 - Jan 2025

Saw-mon and Natalie
Jonatas Martins
cergyk
Huma Finance

Huma Finance

Huma Contracts v2

Jan 2024 - Jan 2024

+1
Kankodu
Saw-mon and Natalie
Liam Eastwood

Security portfolio

Title
Description
2023 RewindContributed to the creation of 2023 Rewind and ranked #2 in incident writing contest
Certora Prover Tools - Aave Grant ProgramThe Aave Grant Program was a program to verify with Certora Prover the Aave Starknet Bridge and Aave Token V3. I was able to identify an issue during the Aave Starknet Bridge security review.