Oleksii Shchur, Developer in Kharkiv, Kharkiv Oblast, Ukraine
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Oleksii Shchur

Verified Expert  in Engineering

Software Developer

Kharkiv, Kharkiv Oblast, Ukraine

Toptal member since March 15, 2018

Expertise
SQLMagentoReact.jsNode.jsJavaScriptExpress.jsBlockchainSymfonyAngularBootstrapAgile DevelopmentMySQLTypeScriptAWSGraphQL
Bio

Oleksii is a skilled developer specializing in modern web and blockchain technologies. He has contributed to advancing decentralized finance by developing Web3 modules, streamlining ETL workflows, and integrating Solidity-based features. Passionate about collaboration and innovation, Oleksii thrives on creating efficient, scalable solutions that drive impact in the decentralized economy.

Portfolio

ParaSwap
JavaScript, TypeScript, Python, Solidity, Web3, Blockchain...
Client (via Toptal)
GraphQL, Apollo, TypeScript, React
Webmeester
MongoDB, React, Node.js, Express.js, Web3

Experience

  • SQL - 10 years
  • JavaScript - 7 years
  • React - 7 years
  • Node.js - 7 years
  • Express.js - 6 years
  • Amazon Web Services (AWS) - 5 years
  • TypeScript - 5 years
  • Blockchain - 4 years

Availability

Full-time

Preferred Environment

GitHub, Visual Studio Code (VS Code), JavaScript, TypeScript, React, Node.js, Express.js, Python, SQL

The most amazing...

...thing I've helped improve was a liquidity aggregator processing billions monthly by working on user-facing systems and streamlining Web3 solutions.

Work Experience

Full-stack Web3 Engineer

2020 - PRESENT
ParaSwap
  • Contributed to the user interface and implemented some of the modules as a front-end developer.
  • Implemented and expedited important peripheral modules related to staking and distribution processes as a back-end developer.
  • Maintained analytics as the person in charge of data integrity and accuracy.
Technologies: JavaScript, TypeScript, Python, Solidity, Web3, Blockchain, Ethereum Virtual Machine (EVM), Ethereum

React Engineer

2019 - 2019
Client (via Toptal)
  • Participating in migrating a legacy monolithic platform to a contemporary split stack.
  • Created and adjusted components.
  • Analyzed parts of the old platform and the ways to transfer functionality to the new one.
  • Wrote Jest tests.
Technologies: GraphQL, Apollo, TypeScript, React

Full-stack JavaScript Developer

2017 - 2018
Webmeester
  • Developed the front end with React and Redux.
  • Built the API's back end with Node.js and MongoDB.
  • Implemented a Node.js-backed API with GraphQL (via Prisma).
  • Implemented the front end of an application based on React and Apollo.
  • Developed an image annotation tool.
Technologies: MongoDB, React, Node.js, Express.js, Web3

eCommerce Web Developer

2008 - 2010
Gameloft
  • Designed and implemented an internal CMS for mobile eCommerce game webshops.
  • Executed miscellaneous operational tasks for different mobile webshops.
  • Troubleshot and bug-fixed the existing shops.
  • Documented the work.
  • Developed and troubleshot the internal tools used in the company.
Technologies: MySQL, PHP

Experience

Multi Vendor Platform | A Blockchain-based Marketplace

An eCommerce system, where vendors could upload their products and expose it to the visitors of the website. It was a custom marketplace platform with multi-level membership plans featuring blockchain as a payment method.

Time-tracker | An Application Built with Angular and PHP

I have developed an application for managing work logs. It's used to store, filter, and export entries telling what amount of time was spent by a person on a certain activity. The application was using a rich UI built with Bootstrap and allows a multi-level permission scheme.

Direct Repair

http://www.directrepair.be/nl/
Our clients wanted to implement an advanced navigation system that would allow their visitors to easily find parts and appliances by the manufacturer and by machine

I've built a pretty sophisticated system on top of Magento which allowed that kind of navigation.

It was a very performance-sensitive task due to the huge amount of machine-to-appliance connections (over 12 million) so I had to also build advanced indexers and implement it with help of a Solr-faceted search.

Twinkeltje

The client needed a nice and visually appealing website that would suit their fashion niche. She also was in need of constant maintenance, occasional improvements, and server support.

We helped our client with an implementation of all her ideas while providing maximum uptime and security for the website by providing DevOps and web development support.

Education

2005 - 2010

Bachelor's Degree in Mathematics and Computer Science

Kharkiv National Univeristy - Kharkiv, Ukraine

Certifications

APRIL 2017 - PRESENT

Certified Magento Developer

Magento

Skills

Libraries/APIs

React, Node.js, X (formerly Twitter) API, Facebook API

Tools

PhpStorm, Bitbucket, Jira, Confluence, Jenkins, Prisma, GitHub

Languages

SQL, GraphQL, JavaScript, TypeScript, PHP, PHP 7, Python, Solidity

Frameworks

Symfony 3, Bootstrap, JSON Web Tokens (JWT), Express.js, Material UI, Jest, AdonisJS, Angular, Zend Framework, Symfony

Platforms

Magento 1, Blockchain, Amazon Web Services (AWS), Visual Studio Code (VS Code), Ethereum

Paradigms

Test-driven Development (TDD), Agile, MEAN Stack, Continuous Integration (CI)

Storage

MySQL, MongoDB, Databases

Other

Single-page Applications (SPAs), CORS, Back-end Development, MERN Stack, Web3, Authentication, Apollo, Computer Science, Ethereum Virtual Machine (EVM)

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