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Blockchain JavaScript Non-fungible Tokens (NFT) PHP Software Architecture
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$50 USD / hour
Flag of UKRAINE
odesa, ukraine
$50 USD / hour
It's currently 6:14 AM here
Joined April 2, 2020
4 Recommendations

Serhii L.

@serhiilyskin

monthly-level-two.svgpreferred-freelancer-v2.svg
5.0 (18 reviews)
7.2
7.2
$50 USD / hour
Flag of UKRAINE
odesa, ukraine
$50 USD / hour
100%
Jobs Completed
100%
On Budget
89%
On Time
13%
Repeat Hire Rate

Full-stack Developer

Serhii is a highly professional blockchain developer who's been operating in web3 space from 2015. With his solid leadership and unrivaled programming skills, he was a former employee of multiple fast growing crypto startups. He built and deployed many secure and gas optimized smart contracts to EVM networks as well as Solana. Treating projects like his baby, his can-do attitude combined with full-stack skillset brought notable success from ground up. Understanding the importance of clear communication on remote work, he communicates thoroughly and he contributed to BD stuff as well, as a team lead. His Skillset covers: - Full Stack Blockchain development * Utilizing NFT and fungible tokens and implementation of Minting/Selling * Being used to most of the standard protocols not only from Openzeppelin but also from Azuki(ERC721A), ERC721Psi and many more * DeFi - Lending, Staking, Yield Farming and more * Building X to Earn model - Play to Earn, Learn to Earn, Scan to Earn and more * Being master of hardhat/truffle, ganache and many more * Being a ninja to help the frontend team to build mobile optimized react pages with web3/ethers implementation - Full Stack Web development * MERN stack * LAMP stack - Windows application development As he is pretty fluent with other programming languages like java, c++ and c#, he can work on desktop applications as well. * Assistance software for ONLINE POKER players * Web automation utilities * Desktop Game launchers * Crypto currency miner ... Always open to discussion for any projects and any offers. Cheers!
Freelancer PHP Developers Ukraine

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Portfolio Items

Includes Email Marketer (Bulk Mail Sender), Facebook Marketing (Facebook Auto Messenger), Leads Pool & Traffic Generator.
Marketing Helper Utility
An Auto-commentor for graphtreon.com
Web Automation
A comprehensive miner which supports 7 crypto currencies.
Cryptocurrency Miner
Launcher for a video game.
Game Launcher
I've analyzed anti-debugging / anti-cheat systems of popular video games, including CSGO, League Of Legend and Call Of Duty,
and figured out how they are working and what vulnerabilities they have.
Reverse engineering for popular video games
I've analyzed anti-debugging / anti-cheat systems of popular video games, including CSGO, League Of Legend and Call Of Duty,
and figured out how they are working and what vulnerabilities they have.
Reverse engineering for popular video games
I've analyzed anti-debugging / anti-cheat systems of popular video games, including CSGO, League Of Legend and Call Of Duty,
and figured out how they are working and what vulnerabilities they have.
Reverse engineering for popular video games

Reviews

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Showing 1 - 5 out of 18 reviews
Filter reviews by: 5.0
€1,400.00 EUR
Serhii is a great professional, with exceptional communication skills, and really impressive technical expertise. Furthermore he is a very polite man, always willing to help, and with genuine passion for his job. Project delivered in no time, with final detailed report following. Highly recommended: you can't go wrong with him, believe me.
PHP JavaScript Software Architecture Blockchain
+1 more
User Avatar
Flag of Enrico B. @fucinedev
3 months ago
5.0
$11,472.00 USD
Great job! Serhii is very skilled and his work product was excellent.
C
Flag of Cole S. @cstern01
11 months ago
5.0
€3,500.00 EUR
Good communication, good work, followed instructions thoroughly.
Java Android Kotlin ARCore
M
Flag of Maximilian B. @maxb82
1 year ago
5.0
$100.00 USD
Great freelancer! Will be doing future projects with again
User Avatar
Flag of Dj H. @DJCrypto1
1 year ago
4.2
$375.00 USD
Serhii is a very professional developer. I appreciate his effort and availability on chat. I would certainly work with him again on a future project.
Node.js MongoDB
O
Flag of Orrin M. @orrinmcc
1 year ago

Experience

Smart Contract Developer

Chsr-Unisoft
Apr 2020 - Feb 2022 (1 year, 10 months)
- Designed and Structured the NFT and DeFi protocols. - Rich experienced in ERC721A, ERC1155, and various EIPs - Deep experienced in Moralis and Thirdweb - Deep understanding of MakerDAO, Aave and more - Wallet integration using web3 and ethers - Designd and developed smart contracts for NFT and DeFi including upgradable ones.

Front-end Development

Binariks
Jul 2017 - Apr 2019 (1 year, 9 months)
- Beautiful Web and Mobile Design - User Interactions Development - Accounting, Inventory and Product functions (some parts of LMS system)

Web&Mobile Design

Shakuro
Feb 2015 - Mar 2017 (2 years, 1 month)
- PST to HTML Design - UI/UX design and Landing page Design and the others. - Payment gateways Integration (Paypal, Square, Stripe, Crytpocurrency)

Education

Bachelor

Kherson State Technical University, Ukraine 2008 - 2012
(4 years)

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Verifications

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Certifications

preferredfreelancer-1.png Preferred Freelancer Program SLA 1 97% us_eng_1.png US English 1 90%

Top Skills

PHP 9 Software Architecture 8 JavaScript 4 Blockchain 4 Non-fungible Tokens (NFT) 4

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