jamillhallak

Web3 Security Researcher | Smart Contract Engineer | Evm Expert

I'm a Smart Contract Security Researcher and Full-Stack Web3 Engineer with 4+ years of hands-on experience in Solidity, formal verification (Certora, Halmos), and protocol auditing (Code4rena, Sherlock, CodeHawks). I've built and secured DeFi platforms, multisig wallets, staking systems, and zk-integrated apps across multiple chains. I specialize in clean, modular, and test-driven smart contracts with deep EVM-level understanding.

I'm looking for remote roles in smart contract security, auditing, or protocol engineering, ideally at a team that values high-assurance code, formal methods, and solving hard problems in DeFi or zk infrastructure.

Experience: 5 years

Yearly salary: $164,000

Hourly rate: $75

Nationality: 🇧🇷 Brazil

Residency: 🇦🇪 United Arab Emirates

Experience

Security Researche

code4eran

2024 - 2025

Make DeFi safer

Lead Engineer|Web3 & GameFi Architect

skyland

2024 - 2024

- Blockchain & Security: Engineered robust blockchain solutions with Solidity, Rust,and Go, strengthened cryptographic security through AWS KMS integration, advanced encryption standards, and in-depth smart contract audits. - DeFi, Smart Contracts & Protocols: Designed and optimized advanced DeFi tokenization protocols and NFT systems, increasing GameFi transactions performance by 25% and ensuring economic stability. - Cloud Optimization: Developed AWS-based cloud infrastructure (EC2, Cognito, GameLift, Lambda), improving efficiency by 26%. - System Architecture: Built a secure, scalable backend integrated with Unreal Engine, implementing parallel transaction listeners to enhance backend security.

Full Stack (Web3)

Atomic Swap

2022 - 2023

- Orchestrated secure and seamless cross-chain asset transfers by developing a blockchain bridge, emphasizing advanced DeFi interoperability and liquidity optimization. - Successfully integrated ERC-721 tokens with Spatial Metaverse applications.

Backend and Blockchain developer

TRU

2021 - 2022

Led backend development for an NFT marketplace, integrating minting, metadata management, and secure trading logic. Optimized contract interactions to reduce gas costs and improved transaction reliability. Delivered a smooth user experience and increased platform performance.

Skills

backend

blockchain

defi

ethereum

ethereumjs

evm

full-stack

hardhat

javascript

nft

node

python

react

remix

rust

smart-contract

solana

solidity

truffle

web3

web3js

english

arabic

portuguese

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