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$25 USD / hour
Flag of SERBIA
vladicin han, serbia
$25 USD / hour
It's currently 3:27 AM here
Joined August 12, 2020
1 Recommendation

Aleksandar R.

@acafrel

monthly-level-four.svg
4.8 (8 reviews)
5.5
5.5
$25 USD / hour
Flag of SERBIA
vladicin han, serbia
$25 USD / hour
100%
Jobs Completed
100%
On Budget
100%
On Time
N/A
Repeat Hire Rate

Senior Web&Blockchain Developer

Hi, I am Aleksandar. Thank you for visiting my profile. I am a full stack developer with over 7 years of rich experience in web & blockchain development and project management. Enthusiasm , challenge-driven, test-driven are my favorites. Always ready for web development using Python/Django/Flask, Node/Express/Next, React/Angular/Vue/Web3.js and blockchain development using Solidity/Vyper. - Back-end Development * Python / Django, Flask, Ruby / Ruby on Rails * Node.js / Express.js / Nest.js * AWS (EC2, S3, Serverless, etc) * PHP / Laravel - Front-end Development * Advanced JavaScript frameworks - React/Redux, Angular, Vue.js, Next.js, Nuxt.js * General web technologies - HTML5, CSS3(SASS/LESS/SCSS), Bootstrap, jQuery * Languages - JavaScript ES6/7, Typescript - Blockchain Development * Ethereum Smart Contract(Solidity, Vyper) * ERC20, ERC777, ERC721, ERC1155 Token development * NFT(minting, marketplace with attracting UI and IPFS in Ethereum, Cardano, Binance, Solana, etc) * Web3.js and digital wallet integration like MetaMask, Phantom -Database *Non-realational Database: MongoDB, AWS Lambda *Relational Database: MySQL, PostgreSQL, Oracle - Other * Management Tools: Jira, Trello * Operating Systems: Linux, Windows * Tools: GitHub, GitLab, BitBucket, Docker, Kubernetes I always enhance my skills and learn new technology/languages/systems. I prefer to join large and long-term projects. Willing to work with you and make your idea into results-focused and world-class project. Able to work full time on your time zone. Thank you
Freelancer Javascript Developers Serbia

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Portfolio Items

- 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

Reviews

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Showing 1 - 5 out of 7 reviews
Filter reviews by: 5.0
$500.00 AUD
Great work. Went above and beyond to complete my task.
C Programming Cryptocurrency
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Flag of Mathew C. @mathewcook
3 months ago
5.0
$125.00 USD
Excellent freelancer
PHP JavaScript Python jQuery / Prototype
+1 more
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Flag of KM3 Solutions LLC @kristoffermorri8
11 months ago
5.0
[SEALED]
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
User Avatar
Flag of Symbols LLC @austinmccoy
1 year ago
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
User Avatar
Flag of Andres A. @paskal77
1 year ago
4.8
$4,700.00 USD
Aleksandar was delivering great value on my project, he setting up a google server and created a SaaS application according to my specification's. His communication was outstanding and clear from the start so there was no hesitation in increasing the scope of the project midway. I plan to request more development from Aleksandar in the future [08 July, 2021] Aleksandar has implemented all ideas to the software development i requested and foreseen issues that may occur in advance. It has been great working with Aleksandar.
Python Twitter
User Avatar
Flag of Martin I. @isakssonjp
1 year ago

Experience

Frontend Web3 Developer

Sovryn Origins
Oct 2021 - Feb 2022 (4 months, 1 day)
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
May 2021 - Sep 2021 (4 months, 1 day)
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

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Top Skills

JavaScript 5 Node.js 4 Python 3 PHP 2 jQuery / Prototype 2

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