Georgii is available for hire

Georgii Perepechko

Verified Expert in Engineering

Front-end Developer

Location

Haifa, Israel

Toptal Member Since

March 15, 2022

Georgii specializes in front-end development, creating web (React and Node.js) and mobile (Flutter) apps from scratch, and maintaining complex enterprise projects. He has handled internationalization (i18n) and localization (l10n) for foreign markets in more than 15 languages. Georgii has worked extensively in the country's top tech company and guided JavaScript developers in React and TypeScript as a boot camp education mentor.

CSS HTML5 NPM TypeScript React React Redux JSX GraphQL Redux Dart Git REST APIs Jest Lodash Agile Phaser Localization

Portfolio

Practicum

TypeScript, JavaScript, React, Redux, WebSockets, GraphQL, Node.js, HTML, CSS...

Yandex

TypeScript, Flutter, GraphQL, Node.js, Prototyping, Express.js, React, gRPC...

UCHi.ru

JavaScript, Phaser.io, Internationalization, Localization, Prototyping, React...

Experience

CSS - 6 years JavaScript - 5 years TypeScript - 5 years React - 5 years Node.js - 4 years GraphQL - 4 years Dart - 2 years Flutter - 2 years

Availability

Part-time

Preferred Environment

MacOS, Slack, Visual Studio Code (VS Code), TypeScript, React, Dart, Flutter, NestJS, Next.js, JSX, NPM, Git, Agile

The most amazing...

...project I've delivered was a complete rewrite of native mobile apps to Flutter. Customer satisfaction improved and development speed increased threefold.

Work Experience

Education Mentor

2020 - 2022

Practicum

Helped over 100 pupils with none to three years of front end experience. Over 70% of the graduates switched to a job in IT or got promoted within a year of finishing the courses.
Created a Slack bot to help automate advisers' tasks, which is now used throughout the company.
Recorded live coding sessions on HTML, CSS, JavaScript, Node, Typescript, React, Express, etc.
Led teams of students who worked on production-scale projects for several months.

Technologies: TypeScript, JavaScript, React, Redux, WebSockets, GraphQL, Node.js, HTML, CSS, Cypress, Playwright, Jest, MongoDB, Storybook, HTML5, Tailwind CSS, Figma, React Redux, JSX, NPM, Git, REST APIs, Team Leadership

Mobile and Web Developer

2018 - 2021

Yandex

Wrote several web apps from scratch and led UI development on rewriting two native apps in Flutter.
Solved performance issues and improved UX with SSR, web workers, WebSockets, infinite scroll, and animated charts.
Created a framework for generating GraphQL queries from TypeScript class and field decorators, and caching the requests data.
Created hundreds of unit-, integration- and E2E tests to ensure the app works correctly and performance is top-notch during CI/CD.
Developed, maintained, and oversaw the availability (99.99) of two cloud-based Node.js apps consisting of multiple microservices.

Technologies: TypeScript, Flutter, GraphQL, Node.js, Prototyping, Express.js, React, gRPC, SIP, BLoC, Redux, Redux-Saga, WebSockets, Playwright, Jest, Storybook, HTML5, Python, Figma, Python 3, React Redux, JSX, Automated Testing, NPM, Git, Docker, Lodash, REST APIs, Agile, Leadership, Team Leadership

Front-end Engineer

2017 - 2018

UCHi.ru

Built hundreds of animated exercises and games for school children using Vanilla JavaScript and Phaser.
Handled internationalization (i18n) and localization (l10n) for foreign markets (China, India, Brazil, and others, in more than 15 languages).
Wrote a UI wrapper for a stockfish.js chess engine.

Technologies: JavaScript, Phaser.io, Internationalization, Localization, Prototyping, React, HTML5, NPM, Git, Lodash, REST APIs

Experience

Website to Provide Refugees and Volunteers with Information

I joined the project for a short 48 hours during the hackathon. I redesigned the website in accordance with the Figma design document, adding popups, and collapsable groups, improving routing, and fixing a few bugs in the original code.
I also added a quick way to deploy the website for testing and showcasing purposes.

Yandex Telephony Website

https://telephony.yandex.ru/

An app for small-to-medium call centers with VoIP capabilities and CRM functionality.

I led feature development of several key components on both the front end (user notifications, payments, client-side file archiving, etc.) and back end (audio converting, server-side rendering, mock services, etc.). Wrote many of the E2E unit, screenshot, and snapshot tests to ensure the app's quality.

YaCalls - Internal Call Center App

Web app for a call center.

I've developed on both the front end and back end these features:
• Real-time call tracking using WebSockets
• Rich statistics with animated diagrams and reports with flexible filters
• Virtual lists of tens of thousands of users
• A framework for creating and caching GraphQL requests
• Many other features

Skills

Libraries/APIs

React, Redux-Saga, React Redux, Node.js, Lodash, REST APIs, Playwright

Tools

JSX, NPM, Figma, Git

Frameworks

Flutter, Redux, Jest, Tailwind CSS, NestJS, Next.js, Express.js, gRPC, Phaser.io, Cypress, TestCafe

Languages

TypeScript, Dart, GraphQL, JavaScript, CSS, HTML5, HTML, Python, Python 3, TypeScript 3

Storage

MongoDB

Paradigms

Automated Testing, Agile, Modular CSS

Platforms

Contentful, Docker

Other

Storybook, Prototyping, BLoC, SIP, Internationalization, Localization, WebSockets, Leadership, Team Leadership, TypeORM

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