Nikolay Semenyuta
Private message 
Kyiv,
Ukraine
available for hire
Rating
Language proficiency level
Українська: fluent
English: upper-intermediate
CV
7+ years of commercial experience in software development.
4+ years of experience in blockchain development (dApps for EVM based blockchains)
Arrived as React developer then start extensive research into crypto market, DeFi, and blockchain solutions. Practical experience with Ethereum, Solidity, OpenZeppelin, React js, Truffle, Web3, Ganache, REST. Created and deployed ERC20 token smart contracts (Ethereum, Polygon nettworks, solidity). Designed and implemented frontend layer using React. js, JavaScript, CSS, HTML. Ticker module utilizing web socket channel and asynchronous API calls to receive real time market updates. Metamask wallet integration and authentication.
A lot of expirience in NFT, S olana dApps. During 2022 i ’ve launche more than 20 nf t collec tions, make my own NFT staking protocol, published a course about Solana NFT development.
Skills and abilities
Programming
-
Bot Development
from 18 USD for hour
-
Cryptocurrency & Blockchain
from 23 USD for hour
-
Data Parsing
from 18 USD for hour
-
Javascript and Typescript
from 18 USD for hour
-
Web Programming
from 18 USD for hour
Services
-
Data Processing
from 18 USD for hour
-
Information Gathering
from 18 USD for hour
-
Payment Systems Integration
from 18 USD for hour
-
Website Development
from 271 USD for project
Administration
-
Software & Server Configuration
from 18 USD for hour
Outsourcing & consulting
-
Consulting
from 18 USD for hour
-
Project Management
from 2255 USD for month
Portfolio
-
100 USD Metadata for 3D NFT Collection
Cryptocurrency & Blockchain
Task: Create a metadata for a full 3D display of the NFT collection in which all the images are the same. The model should be interactive both in the wallet and on the marketplace.
Execution: A metadata with the necessary attributes was generated from scratch. The 3d example of NFT was presented below, as the author of the collection does not want disclosure.
-
1000 USD Remint Solana NFT App
Cryptocurrency & Blockchain
Prehistory: the client released a collection on a lounchpad, where he was wrongly made a metadata and confined the entire collection + did not give access to the account authority updates.
Task: Create a site where the user will be able to connect with the Solana crypto wallet click the "Remint" button after which all the old NFT will be destroyed and the new ones will be shut down. All of this must be done in the form of one transaction. The user should get exactly the same NFT as he had.
… Implementation: a site was implemented on React and a smart contract with which we were able to fulfill the assigned task. The client also had to place all the metadata on his server, which we also successfully did.
-
300 USD NFT collection on Ethereum
Cryptocurrency & Blockchain
Task: Create a NFT collection on Ethereum
Implementation: After the call with the customer discussed all the points, I got layers and started the generation of images with a metadata. Further, a smart contract was created with all the wishes of the customer including a revile (the beginner user doesn't know what specific NFT he got and only after a certain moment everyone sees his image and its attributes, it's done so that the flipers immediately don't throw the flora of the collection), as well as 3 sales stages were implemented: OG, WL, Public with different prices.
A simple Mint site with a link to the contract was created. Transactions were made through a private RPC from Quicknode.
-
50 USD by Solana Airdroper
Cryptocurrency & Blockchain
Task: Write a script for the automatic sending of tokens and NFT to the Solana network to the address list.Implementation: A realised Python script based on Solana CLI with two operating modes:
1 .The user enters the token address name and the amount of tokens to be sent to each address in the .env configuration file, then puts a list of addresses in airdrop.txt and starts the script.2ndPRO mode: The script passes and performs sendings through the airdrop.csv file that contains 3 columns: token address, recipient address, number.Advantages of the script: Before the airdrop'a start, the script removes information about the number of recipients and the amount of SOL that will be spent on the airdrop.During the sending of tokens the script creates two success.csv and fail.csv files where it holds all the addresses and signatures of transactions of successful and unsuccessful sendings, after the end of the airdrop, this information is also removed.The script itself works with both ordinary tokens and NFT.Likewise, the script does not require RPC or proxy to work and there is no chance to capture any time-outs.PS: A script review is on my YouTube channel "Blockchain Developer"
-
300 USD ERC1155 Certificate for 01k Academy
Cryptocurrency & Blockchain
Task: Make non-transferable NFT certificates for academic students.Implementation: After consultation, the decision was made to implement certificates on the basis of the ERC1155 contract in the Polygon network.I made a contract taking into account all the wishes of the customer, set a WL mint so that the certificate could only be obtained by students who successfully passed the course, uploaded a service contract that allows you to easily and without interference in the code to add new addresses to Whitelist and broke a simple landing-page on which the user can connect his crypto wallet and finish NFT.The collection page was also set on Opensea.Collections on Opensea: https://opensea.io/collection/a01k-academy
Note: NFTs are untransmitted, while they can be displayed on Opensea, but when trying to buy them there will be a mistake.This is the feature of Opensea, because they do not prohibit the exhibition of non-transferable tokens for sale, but there is no sense in this.The certificate itself is 1 per wallet, and the money for the wallet is sent to the customer's wallet.There is also the possibility to add other certificates to the collection.
-
20 USD The NFT Downloader
Cryptocurrency & Blockchain
Task: Develop software to save images and metadata files from any NFT collections on the Solana blockchain. The software should work without RPC, proxy.
The task is performed using the python script, which receives the hashlist collection entrance, passes through each NFT, downloads the metadata and the image. The Moralis API (Free) was used for implementation.
The software is sold on my site, the instructions are on YouTube, ready to upgrade the software under any needs to develop any script to solve your business problem.
-
20 USD Solana Account Generator
Cryptocurrency & Blockchain
Task: Create a software that allows you to quickly generate an unlimited number of Solana accounts, then save the data in the table in the format: account, private key.
The work was done with Python script and Solana CLI. You do not need to use proxy and third-party libraries to generate accounts. The generating speed of 1000 accounts is 5 minutes (the timetables can be reduced when purchasing RPCs). The software is ready and is sold on my website. It is possible to improve the software under any needs of any blockchain software. Go to turn.
-
300 USD Free-mint NFT collection on Ethereum
Cryptocurrency & Blockchain
Task: Make a #NFT collection on #Ethreum with a free minute where the user at the NFT minute only pays for gas. + integration of the MINT button to the customer’s website. The task was completed, the test mints were carried out, but the customer is still preparing the background for full launch.
-
500 USD NFT Collection on Solana + Airdrop
Cryptocurrency & Blockchain
Task: Create a #NFT collection on #Solana and then put all the NFTs on your wallet, put them #airdrop on your user wallets and put the collection on such marketplaces as MagicEden, OpenSea. The task was completed in 2 days, as the customer asked to do everything urgently, the price was $800, without urgency the price for such work ~$500. There is great experience in launching NFT collections on Solana, Ethereum, Flow.
The full video where I told how I performed this work is on my YouTube channel: https://www.youtube.com/watch?v=tu2f_DYuidw
-
YouTube Channel “Blockchain Developer”
Cryptocurrency & Blockchain
I lead a YouTube channel on the topic of blockchain development, tell people about how to implement dApp, launch NFT collections, develop smart contracts.
Now content mainly about the development under Solana and other blockchain, is a specific goal to gather a audience that is interesting for Blockchain Development. I will continue to teach people #Solidity and my dApps development industry under #ethereum
Reviews and compliments on completed projects 6
5 June 2023
496 USD
The Black Dolphin V2
Good guys, fast and always in contact.
13 May 2023
169 USD
Mint NFT and connecting it to the site
A top breakdown. He is responsible and knows his business.
It is easy to communicate, understands everything from the sex of the word and shows initiative.
4 April 2023
11 USD
Create metadata for Solana NFT collection
The work was performed quality. Everything is fast and skillfully, the performer is well understood in the blockchain of the solan.
The performers themselves have unhealthy user-friendly abilities, so you will be pleased to communicate with him. I will address.
|
3 April 2023
124 USD
A description of the cryptocurrency trading function
Pleased with the work done! Everything is done accurately and in time. I recommend !
6 March 2023
27 USD
Installation of Solana NFT
Nicholas through the remote work table us to set up the already ready NFT contract, bind it to the front end and put it all on Vercel. He provided quality advice and told us the subtles we didn’t even imagine. Thanks to Nicholas we decided not to save, to buy a dedicated RPC and this saved our Mint (initially we were advised to use api.mainnet-beta.solana.com).
It’s the most skilled blockchain expert I’ve ever met. In an hour of communication, I learned about Solana more than a year in the field of nft flip.
5 March 2023
226 USD
Developing the documentation for the creation of nft
They worked greatly. I will continue to work on the next project.
Activity
| Latest proposals 10 | Budget | Added | Deadlines | Proposal | |
|---|---|---|---|---|---|
Arbitration bot
|
|||||
|
Audit of three smart contracts
581 USD
|
|||||
|
Solana script
25 USD
|
|||||
|
Fullstack JS (React + Node.js) Developer + Web3
|
|||||
|
Python developer
|
|||||
|
Creation of a smart contract (or purchase of a ready-made one) with subsequent integration into the website
609 USD
|
|||||
|
Creation of a smart contract (or purchase of a ready-made one) with subsequent integration into the website
609 USD
|
|||||
|
Memetic crypto-ecosystem
609 USD
|
|||||
|
Token in the Phantom network
45 USD
|
|||||
|
Connecting Ton Wallet
|