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Oleh – React, React Native, Lerna, experts in Lemon.io

Oleh

From Ukraine (GMT+3)

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Front-end Web DeveloperSenior
Hire developer
7 years of commercial experience
Art and creativity
Banking
Military
Public services
DMS
Enterprise software
Mobile apps
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Oleh – React, React Native, Lerna

Oleh is a Senior Front-End Developer with good communication skills. For the past 5 years, Oleh has been actively using React and demonstrated admirable familiarity with its ecosystem. He is a responsible team player, whose list of previous projects includes working on an online documents management platform, a self-improvement application for women, and a company that develops IT products for various state orders.

Main technologies
React
5 years
Additional skills
React Native
Lerna
Webpack
Canvas
Ramda
Typescript
JavaScript
Firebase
Objective C
MySQL
Redux
Kotlin
Vue.js
Unity
REST API
Jest
Docker
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

ReactNative developer
Jul 2020 - Nov 20211 year 4 months
Project Overview

This is an application for self-improvement design for women. With surveys (text and image) for forwarding you in the right development direction, motivating video, audio and quotes.

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Responsibilities:

  • Developed application from scratch.
  • Connected Firebase, but later change it to Yandex App Metrica because Firebase has a policy about unlogged users
  • Made testing application
  • Released in app-store
Project Tech stack:
React Native
Canvas
Redux
Lodash.js
Material UI
yandex matrica
Firebase
app store
test fly
ReactNative developer
Aug 2019 - Feb 20206 months
Project Overview

Bank application, with a lot of mobile banking features like paying taxes, payment of utility bills, buying stocks, etc.

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Responsibilities:
  • Communicated with back-end team.
  • Implemented different 2D animation.
  • Implemented specific card carousel
  • Optimized load data process.
  • Implemented payment of utility bills flow.
  • Implemented money transfer flow.
  • Implemented user account page
Project Tech stack:
React Native
Ramda
Jenkins
Objective C
Kotlin
Redux
Canvas
HTML animation
REST API
Fullstack developer
Nov 2016 - Mar 20181 year 4 months
Project Overview

The first project was the state employment center. This product working with state orders for more than 20 years, so they redesigned the whole website, also admin page, they have custom CRM running over Unity Base (like Node.js but with SpiderMonkey engine instead of V8). The second project was a military communication application. Main goal was to improve speed of tactical communication, with a map on which scouts group can draw enemy positions so other commanders can see battle orders (enemy and ally) in real-time. This application was developed over NATO standards of military communication and NATO military symbol.

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Responsibilities:

On the first project

  • Rewrote whole project - the last version was on jQuery and modified more than 10 years ago
  • Created build
  • Wrote queries to the database
  • Wrote authorization

On the second project, it was an MVP for tender.

  • Created methods for easy drawing symbols on map.
  • A little optimize (due it was MVP) map load process (due to different scale map take a lot of memory space)
  • Implemented audit trail
  • Implemented chat
Project Tech stack:
React
Vue.js
SCSS
MySQL
REST API
Unity Base
Redux
Leaflet
react router
JavaScript Team Lead
Apr 2018 - Unfinished6 years 1 month
Project Overview

This is a comprehensive online document management platform that provides the services of an online editor, cloud storage platform, document flow automatization and a signature request manager all in one package.

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Responsibilities:
  • Wrapped WYSIWYG editor (rich text editor) with our functional (search/replace, comments section, fields with prescript scenario etc)
  • Changed WYSIWYG editor with real docx editor (the biggest change was with prescript fields, change it to native oleObject element which works in MS Word as well)
  • Rewrote features on the new design, with optimization (worked in workflow team whose feature was document flow scenario like sharing/send to sign/link to fill/ fill in bulk )
  • Wrote unit test (with jest)
  • Implemented CI/CD git hooks (for easy publish packages, test before commit, check quality)
  • Rewrote some apps and libraries in monorepository (with lerna)
  • Communicated with other teams
  • Led new members
  • Made from the scratch new feature for document sending/filling automatization
Project Tech stack:
React
Docker
JavaScript
REST API
Redux
Jenkins
Formik
Lerna
Webpack
styled component
Ramda
Lodash.js

Education

2016
Computer Engineering
Bachelor degree
2018
Computer Engineering
Master degree

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