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$25 USD / tunti
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Kello on tällä hetkellä 11:47 ip. täällä
Liittynyt elokuuta 12, 2020
1 Suositus

Aleksandar R.

@acafrel

monthly-level-four.svg
4,8 (9 arvostelua)
5,5
5,5
$25 USD / tunti
Maan SERBIA lippu
vladicin han, serbia
$25 USD / tunti
100 %
Suoritetut työt
100 %
Budjetin mukaisesti
100 %
Aikataulussa
Ei saatavilla
Uudelleenpalkkausaste

Senior Web&Blockchain Developer

Starting from middle of 2018 began proactively working on blockchain related projects as a Blockchain software engineer. My experiences range from creating both front-end blockchain applications to backend architecture design and implementation, smart contract development, testing, auditing and development of dApps for Fintech, defi, and other industries that need the power of decentralization, tokenization, and smart contracts. Public Blockchain Platforms: Ethereum ✓ Developing smart contracts using a Solidity programming language. ✓ Developing RPC using client libraries such as Web3. ✓ Static analysis of smart contracts for gas consumption and optimization using Remix IDE. ✓ Securing smart contracts using libraries like OpenZeppelin. ✓ Developing Ethereum dApps using Truffle framework. ✓ Integration with crypto wallets such as Metamask. ✓ Deploying smart contracts on test networks such as ropsten/rinkeby as well as Ethereum mainnet. Private & Consortium Blockchain Platforms Hyperledger Fabric ✓ Developing Chaincode using the Go programming language. ✓ Developing proof of concepts using Hyperledger Composer. ✓ Integration with Fabric Java SDK. ✓ Creating RESTful APIs for client applications to communicate with the blockchain network. ✓ Creating channels, orderers, and peers. ✓ Deployment and instantiation of Chaincode on channels on cloud services like IBM Bluemix and Amazon AWS. I hold expertise with: - Node.js / Express.js - PHP/Laravel/Codeigniter - React.JS / Redux / Mobx - Angular.JS / Backbone.JS / Javascript / jQuery - Python/dJango/Flask - ASP.Net/C#/EF - MySQL / SQLite / MongoDB / PostgreSQL - Experience with Elastic Search / Solr - Deployment on Heroku / VPS / Amazon Web Services (AWS) / DigitalOcean - Git, Bitbucket, Trello, etc. Here are the applications that I've built so far. - Cryptocurrency exchange platform - ICO / STO Development - Cryptocurrency wallet development - dApp development with smart contract - dApp game with html5 - Front Running/ Sniper /Arbitrage Bot - Ecommerce Platforms - LMS - ERP/CRM Thank you.
Freelancer Javascript Developers Serbia

Ota yhteyttä käyttäjään Aleksandar R. työhösi liittyen

Kirjaudu sisään keskustellaksesi yksityiskohdista chatin välityksellä.

Portfoliokohteet

- updated UI of the extension.
- Integrated 2 features(swap and presales) from Sovryn.
Wallet Extension
A NFT project with Pepper Attack game for gamers.
- NFT presales
- Opensea
- React minting pages
Pepper Attack - NFT/Solidity
A NFT project with Pepper Attack game for gamers.
- NFT presales
- Opensea
- React minting pages
Pepper Attack - NFT/Solidity
A NFT project with Pepper Attack game for gamers.
- NFT presales
- Opensea
- React minting pages
Pepper Attack - NFT/Solidity
A DeFi project based on RSK network.
- Launchpad for ZERO and MYNT
- Staking and Bitocracy
- Swap via AMM and Bonding Curve
DeFi - Sovryn Origins
A DeFi project based on RSK network.
- Launchpad for ZERO and MYNT
- Staking and Bitocracy
- Swap via AMM and Bonding Curve
DeFi - Sovryn Origins
A DeFi project based on RSK network.
- Launchpad for ZERO and MYNT
- Staking and Bitocracy
- Swap via AMM and Bonding Curve
DeFi - Sovryn Origins
Converted Figma design into #React we pages.
D3.js and SVG were used and all components are created from scratch.
Pawtocol Admin Panel(React)
Converted Figma design into #React we pages.
D3.js and SVG were used and all components are created from scratch.
Pawtocol Admin Panel(React)
Converted Figma design into #React we pages.
D3.js and SVG were used and all components are created from scratch.
Pawtocol Admin Panel(React)
This is Twitter Bot that provides the users with the way to monitor the twitters from the concerned accounts for the news and restocks etc.
It has versions for desktop and chrome extension.
I build it from scratch.

Functionality
- Monitoring accounts.
- Open links
- QR Scan & OCR
- Discord Authentication
- etc

Tech Stack
- Electron.js, Node.js, React.js
Extension & Bot - Electron.js, Node.js
This is Twitter Bot that provides the users with the way to monitor the twitters from the concerned accounts for the news and restocks etc.
It has versions for desktop and chrome extension.
I build it from scratch.

Functionality
- Monitoring accounts.
- Open links
- QR Scan & OCR
- Discord Authentication
- etc

Tech Stack
- Electron.js, Node.js, React.js
Extension & Bot - Electron.js, Node.js
This is Twitter Bot that provides the users with the way to monitor the twitters from the concerned accounts for the news and restocks etc.
It has versions for desktop and chrome extension.
I build it from scratch.

Functionality
- Monitoring accounts.
- Open links
- QR Scan & OCR
- Discord Authentication
- etc

Tech Stack
- Electron.js, Node.js, React.js
Extension & Bot - Electron.js, Node.js
This is Twitter Bot that provides the users with the way to monitor the twitters from the concerned accounts for the news and restocks etc.
It has versions for desktop and chrome extension.
I build it from scratch.

Functionality
- Monitoring accounts.
- Open links
- QR Scan & OCR
- Discord Authentication
- etc

Tech Stack
- Electron.js, Node.js, React.js
Extension & Bot - Electron.js, Node.js
This is the GraphQL product applied to the HIPAA(Health Insurance Portability and Accountability Act), which deals with the public common data and private one of each services.
It uses Node.js, Express.js, MongoDB and Apollo Federation, which enables to provide the way to build SaaS service for sharing common data and protecting private data of each services.

Tech Stack:
Node.js, Express.js, MongoDB, GraphQL, Apollo, Federation
HIPAA - GraphQL, Node.js
This is the GraphQL product applied to the HIPAA(Health Insurance Portability and Accountability Act), which deals with the public common data and private one of each services.
It uses Node.js, Express.js, MongoDB and Apollo Federation, which enables to provide the way to build SaaS service for sharing common data and protecting private data of each services.

Tech Stack:
Node.js, Express.js, MongoDB, GraphQL, Apollo, Federation
HIPAA - GraphQL, Node.js
This is the GraphQL product applied to the HIPAA(Health Insurance Portability and Accountability Act), which deals with the public common data and private one of each services.
It uses Node.js, Express.js, MongoDB and Apollo Federation, which enables to provide the way to build SaaS service for sharing common data and protecting private data of each services.

Tech Stack:
Node.js, Express.js, MongoDB, GraphQL, Apollo, Federation
HIPAA - GraphQL, Node.js

Arvostelut

Muutokset tallennettu
Näytetään 1 - 5 / 8 arvostelua
Suodata arvosteluja: 5,0
$50,00 USD
Aleksandar is a top dev here. will work with him..
React.js Ethereum Solidity Smart Contracts Web3.js
Käyttäjän avatar
Maan  lippu Matthias G. @gajematthias
2 päivää sitten
5,0
$500,00 AUD
Great work. Went above and beyond to complete my task.
C Programming Cryptocurrency
Käyttäjän avatar
Maan  lippu Mathew C. @mathewcook
5 kuukautta sitten
5,0
$125,00 USD
Excellent freelancer
PHP JavaScript Python jQuery / Prototype
+1 enemmän
Käyttäjän avatar
Maan  lippu KM3 Solutions LLC @kristoffermorri8
vuosi sitten
5,0
$250,00 USD
I hired Aleksandar to help with AWS issue. He did a phenomenal job working with us on this project. It was tricky project and previous freelancers were unable to complete all the requested changes. He went above and beyond to ensure that I was completely satisfied before moving on after each change. I highly recommend home to anyone on a budget searching for a quick, knowledgeable, reliable freelancer that gets the job done right.
PHP JavaScript AJAX jQuery / Prototype Node.js
Käyttäjän avatar
Maan  lippu Symbols LLC @austinmccoy
vuosi sitten
5,0
$10,00 USD
Alexander did an excellent job, if I need more help I will hire him again.
JavaScript HTML Node.js React.js
Käyttäjän avatar
Maan  lippu Andres A. @paskal77
vuosi sitten

Kokemus

Frontend Web3 Developer

Sovryn Origins
lokak. 2021 - helmik. 2022 (4 kuukautta, 1 )
I contributed to building dapp using react.js, typescript, web3.js. - Sovryn MYNT presale - Sovyrn ZERO presale. Integration into Liquality wallet - dapp for Sovyrn Origins

Solidity Developer

Pepper Attack
toukok. 2021 - syysk. 2021 (4 kuukautta, 1 )
I contributed to building smart contracts for Pepper Attack. - built the smart contracts for presales and staking. - built the minting frontend to mint 10k NFTs

Ota yhteyttä käyttäjään Aleksandar R. työhösi liittyen

Kirjaudu sisään keskustellaksesi yksityiskohdista chatin välityksellä.

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Parhaat taidot

JavaScript 5 Node.js 4 React.js 3 Ethereum 1 Solidity 1

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