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Lengin

Kostiantyn logo

Kostiantyn

Available now

Full Stack Developer @ Lengin

Senior
Seniority
GMT+02:00, Kyiv, Ukraine
Location & Timezone
$45 - $60/hr
Average Hourly Rate
English, Russian, Ukrainian
Languages

Top skills

React.js
Redux
Next.js
TypeScript
HTML/HTML5
CSS
JavaScript
Node.js

About

I’m a React & Node.js engineer with 6+ years of experience in maintaining and developing scalable web applications. I’m results-driven, communicative, and proactive, with strong problem-solving skills and high self-management. I quickly learn new technologies and am always open to new solutions in my job that break the stereotypes of boring development. And the last one, but not the least important in web development: I can Google by myself.

Top skills

Verified by Pangea.ai due diligence

Top SkillsCurrent UsageSeniority
React.js
20%6 years
Redux
10%5 years
Next.js
20%2 years
TypeScript
15%3 years
HTML/HTML5
5%5 years
CSS
5%5 years
JavaScript
10%6 years
Node.js
15%3 years

All skills

Roles and tools, to bring ideas to life and create meaningful experiences

E-Commerce
SaaS
Learning Management Systems (LMS)
Booking Systems
Databases
Cloud Computing
AI & ML Solutions
ChatGPT

Professional experience

Explore a curated selection of projects highlighting Kostiantyn's expertise and experience. Each project aims to showcase challenges, solutions, and the final outcome, along with the tools and technologies used.

Under MNDA
Owndays — Software Engineer
The Owndays Eyewear E-commerce Project aimed to establish an international online store specializing in eyeglass sales. The primary goal was to create a multilingual, functional, flexible, and scalable platform to cater to a global audience. This project was driven by the vision of building a cutting-edge digital commerce experience. -Development and maintenance of the client-side application; -Integration with the content management system.; -Code review and assessment within the team; -Sprint planning and management to ensure effective goal achievement; -Task estimation and timely execution; -Bug fixing and code refactoring to enhance code quality.
E-Commerce
E-Commerce
FashionTech
Frontend Development
Code Review & Refactoring
+7

Under MNDA
Triangle Select — Software Engineer
Triangle Select creating a subscription for Triangle Select. Re-use existing functionality when possible, implement new features when necessary. Enhance or fix broken or sub-optimal features. Implement intuitive and flexible tools for site layout configuration, templating, and content authoring. Design and implement an extensible solution ready for ongoing evolution and enhancements of the site components and features. Decoupled architecture to separate look and feel from content management. -Developed and maintained Client side; -Performed integration with AEM; -Reviewed code; -Groomed and planned sprints; -Estimated tasks; -Performed bug fixing; -Performed code refactoring.
Frontend Development
System Integrations
Code Review & Refactoring
Code Optimization & Performance
Technical Documentation
+6

Under MNDA
Kohler International Holdings Limited — Software Engineer
Create two new JD sites - the international site and site for Germany Re-platform the existing JD sites to a single multilingual, functional, flexible and extendable platform. Re-use existing functionality when possible, implement new features when necessary. Enhance or fix broken or sub-optimal features. Optimize the UI/UX design. Improve overall SEO. Implement intuitive and flexible tools for site layout configuration, templating, and content authoring. Design and implement an extensible solution ready for ongoing evolution and enhancements of the site components and features. Decoupled architecture to separate look and feel from content management. -Developed and maintained Client side; -Perform integration with an external Drupal server; -Solving complex bugs; -Reviewed code; -Groomed and planned sprints; -Estimated tasks.
Website Design
E-Commerce
API
Integrations
E-Commerce
+8

Preferred tools

View the preferred tools and apps used by Kostiantyn to assess compatibility and alignment.

Git
Git
Bitbucket
Bitbucket
ClickUp
ClickUp
Confluence
Confluence
Discord
Discord
Dropbox
Dropbox
Figma
Figma
Github
Github
Gitlab
Gitlab
Google Meet
Google Meet
Jira
Jira
Microsoft Office Online
Microsoft Office Online
Microsoft Teams
Microsoft Teams
Notion
Notion
OBS
OBS
Skype
Skype
Slack
Slack
Todoist
Todoist
Trello
Trello
Visual Studio
Visual Studio
Zoom
Zoom

Career highlights

Discover Kostiantyn’s professional journey, including employment history, certifications, and educational background.

Software Engineer
Software Engineer
Owndays2023 - 2024
Software Engineer
Software Engineer
EPAM Systems (Triangle Select)2022 - 2023
Software Engineer
Software Engineer
Kohler International Holdings Limited2021 - 2022
Developed and maintained Client side; Perform integration with an external Drupal server; Solving complex bugs; Reviewed code; Groomed and planned sprints; Estimated tasks.

Testimonials

Glib Chetvertak, Frontend Developer @ Lengin

Lengin

Verified Testimonial

Kostiantyn is a frontend pro who gets things done right. Whether it’s animations, performance tweaks, or tricky UI components, he always finds a smart and efficient solution. He’s detail-oriented and catches things others might miss. Great to have on the team.

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