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Oleh K.

Front-end Developer
3
years of experience

I am a dedicated front-end developer with a focus on creating responsive, high-performance user interfaces using modern web technologies. With a strong foundation in JavaScript, TypeScript, React.js, Redux, and Next.js, I bring both front-end expertise and a working knowledge of back-end concepts to build seamless applications. My front-end expertise is 4 years. I am also fluent in English, making it easy to collaborate with global teams. My strengths include problem-solving, front-end architecture, and delivering scalable, maintainable solutions. I am passionate about driving innovation and continuously refining applications to ensure top-tier performance and user experience.

Meet me

Education

Bachelor of Computer Applications in Computer engineering, Vasil Stefanik Prykarpattya National University

Languages

English B2

Skills

storybook
Highcharts
ApexCharts
Auth0
TailwindCSS
Ant Design
Redux.js
JavaScript
Next.js
Recharts

Recent Customer Reviews

Kalush, Ukraine
100
% Job Success
Top Rated
HTML5
SCSS
JavaScript
Next.js
Redux
Material UI
TypeScript
TypeScript
React

Work History

FRONTEND DEVELOPMENT
Job in progress
Jan 9, 2025
-
Present
Present
SENIOR REACT TS DEVELOPER FOR HEALTHCARE APPLICATION
Job in progress
Jan 15, 2025
-
Present
Present
WEB APPLICATION NEXT (REACT) + MATERIALUI FRONT-END NEED TO HIRE SENIOR DEVELOPER
Job in progress
5
Oct 16, 2024
-
Oct 29, 2024
Present
Oleg demonstrated the qualities I needed and built a dashboard for me using Material UI React I am happy with his daily progress, code is clean, communication is excellent. Thank...
REACT FRONT-END DEVELOPER CONVERT FIGMA TO REACT WITH TAILWINDCSS
Job in progress
5
Nov 14, 2024
-
Dec 9, 2024
Present
Oleg is an excellent front end developer. I assigned him a job related to redesigning our landing page using Next framework and React library, and I am completely satisfied with...
Contact me on Upwork
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Employment History

No items found.

Projects

Front-end Developer

Modjen

Duration:
4 months
This application is an e-commerce platform, allowing users to select, compare, and buy brand-new clothes, choosing from various sizes, colors, and other customer preferences. With Modjen, updating your style is easy - just a couple of clicks, and your order is saved!
Technologies
Axios
Redux
TypeScript
TypeScript
React
Requirements
Build a responsive, pixel-perfect web app using React.js and related technologies with a modern UI for seamless user experience on all device. Integrate Figma designs, ensuring adherence to typography, layout, and color specification. Implement custom features per customer’s technical requirements, ensuring full functionalit. Ensure cross-browser compatibility and optimize for speed and accessibilit. Maintain clean, modular, and well-documented code, following industry standards for version control, testing, and deployment.
Results
Created a pixel-perfect, responsive, and user-friendly e-commerce application - the Modjen web store. Utilizing the best front-end libraries and tools such as React, Redux, Axios, drag-and-drop libraries, animations, and sliders helped make the site powerful and functional for customers. Collaborating closely with back-end developers, implemented all necessary API requests to fetch, collect, and store user and product data on the server, making the website both informative and fully functional for taking orders. Using this app makes ordering and selecting goods as simple as a walk in the park - demonstrating how a high-quality, modern e-commerce project can enhance your business.

Front-end Developer

Kleer

Duration:
6 months
Kleer is a cutting-edge, cloud-based dental membership platform designed to empower dental practices of all sizes. This powerful and reliable application offers a comprehensive suite of tools to help dental providers create, implement, automate, and expand their membership plans. Trusted by thousands of solo practitioners, group practices, and Dental Service Organizations (DSOs) throughout the United States, Kleer is committed to facilitating the growth and success of dental practices while enhancing patient care.
Technologies
EmotionJS
Material UI
Requirements
Develop a responsive, high-performance web application using Next.js, ensuring easy navigation and optimal user experience across all device. Integrate MaterialUI components and customize with EmotionJS for consistent branding, ensuring consistency with the platform's design system, typography, and color scheme. Implement dynamic data visualization using Chart.js to display key analytics and metrics such as membership growth, plan utilization, and revenue trends, providing an interactive and user-friendly interfac. Collaborate with designers and backend team to integrate design and ensure front-end features meet both technical requirements and business goal. Integrating the Stripe payment system for different types of subscriptions, writing on the backend the subscription canceling logic, email templates for password reset, account verification, payment confirmation and subscription plan upgrade email.
Results
Developed a responsive and high-performance web application using Next.js, creating a seamless user experience across all device. By integrating MaterialUI components and customizing them with EmotionJS, ensured a consistent branding that aligned perfectly with our design system, typography, and color scheme. The dynamic data visualization implemented with Chart.js provided users with interactive analytics on membership growth, plan utilization, and revenue trends, enhancing the overall user interfac. Collaborated closely with designers and the backend team, successfully integrated feature. On the backend, integrated the Stripe payment system for various subscription options and implemented essential functionalities, including subscription cancellation logic and automated email templates for user account managemen.

Front-end Developer

Timely Wills

Duration:
4 months
Timely Wills is a comprehensive platform designed to simplify the process of creating and managing essential legal documents, such as wills and powers of attorney. With its user-friendly interface and a range of features, it enables individuals to easily navigate the complexities of estate planning and ensure that their wishes are clearly documented and legally binding.
Technologies
Intercom
Sonner
Dayjs
Zod
Zustand
Requirements
Creating responsive cross-browse application, mobile firs. User authentication, authorization with json web toke. Protected routes with HO. Integration with API and CRUD operation. Resetting user's password and deleting accoun. Creating complex forms with validatio. Implementing payment methods with Strip. Implementing PDF files review in applicatio. Downloading file. Sending files to the AP. Integration with third party plugin Interco. Managing Zustand store, creating own hooks, type.
Results
Built a responsive, cross-browser application with a mobile-first approach, implementing secure user authentication and authorization using JSON Web Tokens (JWT) and protected routes via higher-order components (HOC). This app integrates with an API for full CRUD operations, enables password reset and account deletion, and includes complex forms with validation, along with payment processing through Stripe. Added PDF file review, download/upload capabilities, and integrated third-party tools like Intercom, managing state with Zustand while creating custom hooks and TypeScript types for a streamlined user experience.

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The developers managed to do a large chunk of work in a short period of time. I recommend working with Incode Group for JavaScript development. Thanks to their unrivaled communication and expertise, they know how to do it in the best way possible and make it work, and the business pays off and monetizes.

John McCoy, CEO ProprHome
Lisbon, Portugal
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John McCoy

The MVP saw marked improvement thanks to Incode Group’s smooth communication and dedication to initial requirements. Their project management was a highlight of the engagement, as were their independent, methodical approach and honesty.

Kevin Peters, Agile Rockstars
Hamburg, Germany,
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Kevin Peters - CTO at Agile Rockstars from Hamburg, Germany.
Dan - Project Manager at Agile Rockstars LLC.

All the outsourcing their team completed was expertly done. Incode Group follows instructions carefully. They’re skilled, creative, and dedicated to achieving set goals. Customers can expect a professional development team that delivers in a timely manner.

Shane Robinett, Knetik Inc
Altamonte Springs, Florida
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Shane Robinett - CTO at Knetik Inc
Altamonte Springs, Florida
Mike Stewart - Project Manager at Knetik Inc

We developed an ERP/MRP web app for a successful e-commerce platform. Development process was smooth, and results were very satisfying. Communication is good, and developers are professional and knowledgeable. We are looking forward for more projects to do together.

David Tarbay, Head of Product
Tel Aviv, Israel
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