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Saifullah
Omar

Average Review
0.00
Reputation
20
Finished gigs
0
Finished jobs
0
Website
github.com
Country
Not specified
Skills
Web, Mobile & Software Dev
Engineering & Architecture
Node.js
MongoDB
Python
Back End Developer
Web Programming
API
Software Engineering
Engineering
Devops
Docker
Automation
Critical Thinking
CI/CD
Specialization
Blockchain
Hourly rate
$25/hr
Preferred payment options
Ethereum
ETH
USDT
BNB Chain
USDT
USDC
BNB
BUSD
Polygon
USDT
USDC
Fantom
USDC
Arbitrum
ETH
USDT
USDC
Optimism
ETH
USDT
USDC
OP
Base
ETH
USDC
About me
Blockchain Researcher and Smart Contract Developer with 3+ years of hands-on experience across freelance client work and industry roles, with a strong foundation in decentralized systems, security auditing, and smart contract engineering. Experienced in developing DApps, auditing contracts, and designing recovery and interoperability mechanisms across EVM-compatible chains. Core smart contract developer of Rain, a live decentralized predictionmarket protocol on Arbitrum One with $136M+ TVL. Also building LifeKey Protocol, a personal research project on decentralized asset recovery. Passionate about advancing blockchain security, formal verification, and sustainable tokenomics through applied research and innovation.
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Work experience

Quecko
November 2024 – Current time
Job title
Blockchain Developer
Work experience & achievements
Developing advanced smart contracts for staking, presale, and NFT DApps on EVM-compatible chains. Integrated The Graph for on-chain data indexing and analytics. Perform deep smart contract testing using Foundry, including mainnet-fork test suites. Built cross-chain bridges and interoperability mechanisms, and implemented buyback-and-burn tokenomics features. Researching Real World Assets (RWA) and blockchain-based asset tokenization. Work daily on gas optimization, upgradeable contract architectures (UUPS, EIP-2535 Diamonds), and multi-chain deployments.
Orbigon
July 2024 – November 2024
Job title
Blockchain Security Researcher Intern
Work experience & achievements
Researched and identified recurring vulnerability patterns in smart contracts and integrated them into SmartMuv, the firm's automated vulnerability and state extraction detection tool. Conducted smart contract audits to detect logic flaws and gas inefficiencies. Researched emerging blockchain exploits to enhance the tool's accuracy, documented findings, and collaborated with the development team on improvements.
Vanar Blockchain
June 2026 – July 2026
Job title
Blockchain Developer Intern
Work experience & achievements
Designed and implemented smart contracts on the Vanar Blockchain in alignment with project requirements. Contributed to the full development lifecycle of a decentralized application (DApp) from conception to deployment. Collaborated with cross-functional teams to enhance contract efficiency, optimize gas usage, and ensure security compliance in a hybrid (remote + on-site) environment.

Education

Air University
Graduation year: 2024
Level of study
Bachelor
Major / Field of study
Cybersecurity
I will develop, test, and deploy secure Solidity smart contracts for DeFi, NFT, and Web3 projects
Engineering & Architecture
Engineering
Devops
$25
More info