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Oleksandr – React, Typescript, JavaScript, experts in Lemon.io

Oleksandr

From Ukraine (GMT+3)

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DevOpsMiddle
Back-end Web DeveloperSenior
Front-end Web DeveloperMiddle
Hire developer
8 years of commercial experience
Administration
Design
E-commerce
Entertainment
Gambling
Healthcare
Insurance
Logistics
Manufacturing
Networking
Product management
Embedded software
Graphic software
Mobile apps
SaaS
Gaming software
Lemon.io stats
1
projects done
598
hours worked
1
offers now 🔥

Oleksandr – React, Typescript, JavaScript

Meet Oleksandr, a full-stack developer with over seven years of experience focusing on back-end development. His background includes Node.js and React application development, work with SQL and NoSQL databases, some knowledge of Python, and practice in DevOps. With experience in developing solutions across various domains, he is ready for a new challenge!

Main technologies
React
5 years
Typescript
5 years
JavaScript
6 years
Node.js
6 years
Python
5 years
AWS
4 years
Additional skills
MySQL
Django
Angular
MongoDB
Redux
PostgreSQL
Ruby on Rails
Docker
Express.js
Flask
Vue.js
GCP
Cypress
Django REST
Microsoft SQL Server
Firebase
.NET Core
Preact
C#
Terraform
DevOps
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Infrastructure Engineer
Dec 2022 - Dec 20231 year
Project Overview

Primary responsibility consisted of supervising and managing the company’s product cloud infrastructure and intorducing fixes and/or improvements based on the end user requests. The infrastructure consisted of a multitude of accounts belonging to one AWS Control Tower managed by IaC (Infrastructure-as-Code), mostly using Amazon CloudFormation. Other parts consisted of CI/CD Tools (Octopus Deploy, TeamCity) and several custom automation solutions written in Python [rogramming language and platform-specific shell scripting languages (Powershell/bash)

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Responsibilities:
  • Developed and maintaining leaderboard components, creating new markup
  • Added new features to the API services
  • Communicated with the team, coming up with new ideas for promotion tools
Project Tech stack:
AWS
AWS CloudFormation
Python
Terraform
Bash
DevOps
TeamCity
Software Developer
Jan 2021 - Nov 20221 year 9 months
Project Overview

A leaderboard module integrated into slot games.

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Responsibilities:
  • developed the leaderboard components
  • fixed bugs and maintained the project.
Project Tech stack:
Typescript
React
.NET Core
ASP.NET CORE
Preact
Typescript
C#
Software Developer
May 2020 - Jul 20202 months
Project Overview

A dasboard for managing photo stock and products.

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Responsibilities:
  • developed the general app architecture (front-end and backend) and components;
  • deployed to Firebase environment;
  • maintenaned application.
Project Tech stack:
Firebase Database
Firebase Cloud Functions
React
Node.js
Express.js
React
Express.js
Firebase
Software Developer
Oct 2019 - Mar 20204 months
Project Overview

A web platform designed for insurance agents to collect data about the property, calculate risks, and create and manage quotes and policies — wildlife in national reserves and parks located in South Africa.

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Responsibilities:
  • designed the interaction of applications and API;
  • enhanced custom components library;
  • uncovered and highlighted deficiencies and made recommendations for improvement;
  • communicated with the client;
  • managed tasks, risks, and time estimation.
Project Tech stack:
Python (custom framework)
Docker
MySQL
jQuery
PyCharm
Amazon Workstations
Knockout.js
JavaScript
Software Developer
Aug 2018 - Sep 20191 year
Project Overview

An application was developed for automating the processes in the curtain manufacturing factory. It consisted of separate applications sharing one database. The primary application was web-based to manage the current stock of ready production and orders written in Django. The other applications were a client application for RaspberryPi workstations, used to operate various factory machines written in Python + Tkinter, and an application for handheld barcode scanners running Android written in Ionic framework.

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Responsibilities:
  • implemented new components;
  • maintained the application;
  • covered the project with tests.
Project Tech stack:
JavaScript
Typescript
Python
Django
Chai
Mocha
Ionic
jQuery
Tkinter
Microsoft SQL Server
Docker
Bash
Cypress
PyCharm
React
Python
Django
Django REST
Bash
Software Developer
Aug 2018 - Jun 20199 months
Project Overview

An application for managing factory processes and workflow (stock, orders, etc.).

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Responsibilities:
  • developed and maintained the application;
  • wrote unit and integration tests.
Project Tech stack:
JavaScript (jQuery)
Docker
MySQL
Microsoft SQL Server
Cypress
Python
Django
Python
Django
Django REST
Software Developer
Oct 2018 - Jan 20193 months
Project Overview

An application using canvas to create logos with drag’n’drop features.

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Responsibilities:
  • refactored the code (breaking into different components from a single monolith React app);
  • added new features;
  • fixed bugs.
Project Tech stack:
JavaScript
React
Software Developer
Oct 2017 - Mar 20184 months
Project Overview

The project aimed to develop a dashboard that aggregates the data from the client machines in the network displays the charts with overall CPU and hard-drive performance, and acts as a plugin for a third-party system administration dashboard.

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Responsibilities:
  • created the front-end application from scratch;
  • helped the back-end developer in developing the RoR API;
  • troubleshoot and addressed server issues.
Project Tech stack:
Ruby on Rails
Chart.js
RubyMine
Vue.js
JavaScript

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