Kostya Y.
Denmark (UTC+02:00) 🇩🇰
Upstaffer since February 16, 2022

Kostya Y. — Front-end lead Software Engineer (React, Angular)

Expertise in Front-End Web, React Developer.

Last verified on March 28, 2025

Core Skills

React
React
Angular
Angular

Bio Summary

- 9+ years of professional expertise in the IT industry; - Rich experience in Frontend Development using (HTML5, CSS3, ES6,React, Angular, Angular JS, Node JS, React(fluent), Backbone(fluent), JQuery), strong technical background; - Experience with third-party services integration; - Experience in databases: MongoDB; - Experienced in software architecture performing; - Team Leading (Tech team); - Experienced in code reviewing and code refactoring - Available in 2 weeks after approval for the project

Technical Skills

Programming Languages CoffeeScript, JavaScript, TypeScript
JavaScript Frameworks Angular, Node.js, React, Vue.js
UI Frameworks, Libraries, and Browsers CSS, HAML, HTML5
Ruby Libraries and Tools ERB
JavaScript Libraries and Tools ES6, Gulp.js, NPM, Redux, Redux-Saga, Webpack, Yarn
PHP Frameworks Slim
Cloud Platforms, Services & Computing AWS, DigitalOcean
Collaboration, Task & Issue Tracking Atlassian Trello, Jira, Slack
Version Control BitBucket, GitHub, GitLab
Operating Systems Centos, FreeBSD, macOS, Ubuntu
SDK / API and Integrations Facebook API, GraphQL, RESTful API, Stripe, YouTube API
Third Party Tools / IDEs / SDK / Services Yarn

Experience 

Front-End Developer, NDA

Mar 2020 – till now

Description: Delivery of material for construction work

Tools & Technologies: JavaScript. Frameworks: React, React-redux, formik, rechart, saga, unit tests

Responsibilities: 

  • team-lead;
  • solution architect frontend parts;

 

Front-End Developer, Clockr

Mar 2020 

Description: We care deeply about family and wanted to create a better solution to the problem of passing on our digital assets. We want to eliminate uncertainty and remove obstacles of cost, procrastination, and frustration from your path.

Tools & Technologies: JavaScript. Frameworks: Angular 9, material, ng-select, jwt-decode. 

Responsibilities: 

  • Implementing new features;
  • Testing 
  • Bug fixing.

 

Front-End Developer, Fitsociety

Sep 2019 – Jan 2020

Description: Become visible for free on the largest fitness website in the Netherlands, guide your customers via the FITsociety platform, and stop looking at your administration.

Tools & Technologies: JavaScript, Angular 8, full calendar, ng-select, Google Maps, crypto.js, ReCaptcha, chart.js, bootstrap.

Responsibilities: 

  • Implementing new features;
  • Testing
  • Bug fixing.

 

Front-End Developer, Team Lead

Jan2019 – till now

Description: We trade digital assets for you. It is too complicated and time-consuming. Save your time for better things. Let us trade for you.

Tools & Technologies: JavaScript, Amcharts 4, flex-layout, material, carousel, ngx-share, ngxtranslate, bootstrap, hammer.js, ng-recaptching, 2cable. 

Responsibilities: 

  • Implementing new features;
  • Testing
  • Bug fixing.

 

Team Lead, Frontend Developer

May 2018 – Mar 2019

Description: Dashboard for a client that gives an opportunity to track Deposit transactions. The Product got various views and reports.

Responsibilities:

  • Team Leading;
  • Front-end development;
  • Routing Implementation;
  • Working with Zeplin;
  • Bug and design fixing, testing.

Tools & Technologies: JavaScript, Angular 5, Bitbucket, AWS Cognito, AWS lambda

 

Team Lead, Under NDA

Jan 2018 - Mar 2018

Description: Custom application for Shopify shops. It helps a lot in building of shop product pages. Among advantages is the opportunity to manipulate page elements, and drag & drop features.

Responsibilities:

  • Front-end development;
  • Team Leading;
  • Front-end development;
  • Code refactoring & reviewing

Tools & Technologies: JavaScript, Vue JS

 

Lead Developer, Under NDA

May 2017 - Feb 2018

Responsibilities:

  • Front-end development;
  • Integration with external APIs;
  • Team Leading;
  • Teamwork controlling;
  • Code refactoring & reviewing

Tools & Technologies: JavaScript, Angular

 

Lead Developer, Under NDA

Apr 2017 - Sep 2017

Responsibilities:

  • Front-end development;
  • Integration with external APIs;
  • Team Leading;
  • Teamwork controlling;
  • Code refactoring & reviewing

Tools & Technologies: JavaScript, JQuery

 

Team Leader, Software Developer, CompanyKazen

Aug 2016 - Feb 2017

Description: Project goal was to create a web portal where everyone could find a personal fitness coach perform subscription and get an opportunity to view fitness programs, recommendations, photo, and video content, communicate with the coach online.

Responsibilities:

  • Development (front-end);
  • Integration with JW Player;
  • Integration with Stripe;
  • Quality Assurance testing;

Tools & Technologies: JavaScript, Angular JS

 

Software Developer, Captivate

Jun 2016 - Sep 2016

Description: Key Project goal was to create a plugin for e-commerce Projects(e-stores) that can collect and store information on users' activity. On all collected information system performed special offer for the user and send him\her an e-mail.

Responsibilities:

  • Development (front-end);
  • Third-Party Integration;
  • Admin panel development;
  • Performing automatic e-mail sender.
  • Quality Assurance testing.

Tools & Technologies: JavaScript

 

Software Developer, Thalamus.co

Oct 2015 - Jun 2016

Description: Project's main goal was to create a corporate investment tool, with hundreds of features for statistics, companies evaluations, etc. The concrete task was to create and implement complicated forms with inputs, checkboxes, and radio buttons.

Responsibilities:

  • Development (front-end);

Tools & Technologies: JavaScript, JQuery

 

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