Oleksandr Poplavskyi, Developer in Kiev, Ukraine
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Oleksandr Poplavskyi

Verified Expert  in Engineering

Front-end Developer

Kiev, Ukraine

Toptal member since October 11, 2022

Expertise
Web DevelopmentFront-endJavaScriptReact.jsSaaSHTML5JiraLodashReduxFintech DevelopmentGitHubDatabaseCSSLinuxUbuntu
Bio

Oleksandr has more than ten years of experience in creating complex web apps. He's worked in various environments—as a freelancer and an engineer in a big international company, developing apps from scratch individually or within a team. Oleksandr led a front-end team of six engineers creating subscriptions for one of the world's leading stock market media. Starting his career as a Python back-end developer, Oleksandr understands both the front and back ends.

Portfolio

Seeking Alpha
JavaScript, React, CSS, HTML5, Sass, Lodash, LocalStorage, GitHub, Linux...
VizHub
React, JavaScript, Styled-components, Node.js, MongoDB, GitHub, Lodash...
Revinate
JavaScript, Jira, React, CSS, Styled-components, HTML5, Microservices, Node.js...

Experience

  • Web Development - 10 years
  • HTML5 - 10 years
  • CSS - 10 years
  • JavaScript - 9 years
  • Front-end Development - 6 years
  • TypeScript - 6 years
  • React - 6 years
  • Front-end Architecture - 5 years

Availability

Full-time

Preferred Environment

Webpack, React, JavaScript, Styled-components, Linux, Ubuntu, REST, GraphQL, Git, Figma, HTML

The most amazing...

...project I've developed is a real-time stock prices chart for one of the biggest stock market sites.

Work Experience

Front-end Team Lead

2020 - 2022
Seeking Alpha
  • Oversaw and provided team members with tasks checking out their progress and completion. Informed the management about the team's current focus and predicted estimates.
  • Participated in developing a UI creating new features, fixing bugs, and covering code with unit tests. I also designed the UI's architecture.
  • Conducted front-end interviews and onboarded new engineers.
Technologies: JavaScript, React, CSS, HTML5, Sass, Lodash, LocalStorage, GitHub, Linux, Ubuntu, Web Development, REST, Git, Highland.js, Figma, CI/CD Pipelines, Testing, Front-end Architecture, Front-end Development, Slack, Fintech, Front-end, User Interface (UI), HTML

Lead Software Engineer and Consultant

2017 - 2020
VizHub
  • Supported the CEO in establishing a Scrum process on the project.
  • Assisted the CEO in elaborating rules and procedures as a part of daily operations.
  • Reviewed the existing solution and proposed ways to improve its architecture while participating in further improvements.
  • Participated in the development of new experimental features.
Technologies: React, JavaScript, Styled-components, Node.js, MongoDB, GitHub, Lodash, LocalStorage, Linux, Ubuntu, Web Development, REST, Git, D3.js, Stripe, Puppeteer, CI/CD Pipelines, Testing, E2E Testing, Front-end Architecture, Front-end Development, WebSockets, Slack, Amazon Web Services (AWS), Docker, Next.js, Front-end, User Interface (UI), HTML

Senior Front-end Engineer

2018 - 2019
Revinate
  • Designed the architecture of front-end widgets and implemented them.
  • Tracked and fixed bugs using Jira as a tracking tool.
  • Covered the solution with comprehensive technical documentation.
  • Implemented backend for frontend (BFF) in a microservice architecture.
Technologies: JavaScript, Jira, React, CSS, Styled-components, HTML5, Microservices, Node.js, Linux, Ubuntu, Web Development, GraphQL, Git, NGINX, CI/CD Pipelines, Zeplin, Testing, E2E Testing, Front-end Development, Redux, MobX, TypeScript, Slack, Front-end, User Interface (UI), HTML

Experience

VizHub

https://vizhub.com/
VizHub was created to help deliver courses in data visualization and host open-source code examples for data visualization. More advanced features of VizHub are currently being developed to help our data visualization consulting projects be carried out faster, better, and more collaboratively. VizHub is free to use for creating open-source, public content that is MIT-licensed.

Education

2009 - 2015

Master's Degree in Computer Engineering

Chernihiv Polytechnic National University - Chernihiv, Ukraine

Skills

Libraries/APIs

React, LocalStorage, MobX, Lodash, Node.js, D3.js, Highland.js, Stripe, Puppeteer

Tools

Webpack, Jira, GitHub, Slack, Git, Figma, Zeplin, Jenkins, Ansible, NGINX

Languages

JavaScript, HTML5, HTML, CSS, Sass, Less, TypeScript, GraphQL

Frameworks

Redux, Next.js

Paradigms

Object-oriented Programming (OOP), REST, Microservices, Testing, E2E Testing

Platforms

Linux, Ubuntu, Docker, Amazon Web Services (AWS), Firebase

Storage

Databases, MongoDB, MySQL

Other

Web Development, Front-end Architecture, Front-end Development, Front-end, WebSockets, Styled-components, SaaS, Networks, Gatsby, CI/CD Pipelines, Fintech, User Interface (UI)

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