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Zulkefal
@zulkefal155
Level 2
Blockchain Developer and Lead Generator
Pakistan
English, German, French, Italian
About me
Blockchain Developer & Data Research Specialist with a proven freelancing journey since 2019. Before graduation, professional services began with lead generation, web research, company contact list building, and Google data extraction, completing 300+ projects with consistent 5-star ratings. After earning a Computer Science degree, services expanded into blockchain development, specializing in ERC-20/721/1155 smart contracts, DeFi and NFT solutions, token swaps, staking, bridging, buyback & burn, Merkle proofs, and ECDSA verification. Contracts are built and tested using Foundry.
Skills
Zulkefal
$15/hour
Offline •
Average response time: 1 hour
See my services
Lead Generation
I will do targeted b2b lead generation and prospects list building
Lead Generation
I will scrape google maps business leads with emails
Want to work on an hourly basis?
Tell Zulkefal what you need.
$15
/
hourPortfolio
Work experience
Blockchain Developer
Quecko • Freelance
Dec 2023 - Present • 2 yrs 5 mos
Experienced in developing and deploying secure, gas-efficient smart contracts for DeFi and NFT applications. Strong expertise in ERC-20, ERC-721, and ERC-1155 standards, token swaps, staking, bridging, and advanced tokenomics such as buyback & burn. Skilled in implementing Merkle proofs, ECDSA signature verification, and upgradeable contract patterns. Contracts are built, tested, and deployed using Foundry and Hardhat, with a strong focus on security, performance, and best practices. Services include custom smart contract development, audits and optimizations, mainnet/testnet deployment, and Web3 integration across Ethereum and EVM-compatible blockchains.
165 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 165 Reviews
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centralio_1
Canada
This was my first time but we received a lot of valuable support. We will repeat again without a doubt. Thank you
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bruno_buisine
Repeat Client
Canada
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loughlinnestor
Ireland
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johnwhunt
Repeat Client
Australia
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johnwhunt
Repeat Client
Australia
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