Kostyantin Ostapenko
Private message 
Offer work 
Vinnytsia,
Ukraine
available for hire
Rating
Language proficiency level
Українська: fluent
Русский: upper-intermediate
English: intermediate
CV
I am a full-stack developer with over 3 years of experience in creating web applications using modern technologies. The primary objective of my work is to develop high-quality, effective solutions that align with business objectives.
My websites work on all devices and in all browsers, attract attention, and help their owners. I create unique solutions that adhere to clean code principles, without relying on constructors. Projects of any complexity: from a landing page to a full-sized web application.
Services that I provide:
- Website development from scratch
- Website copying
- Website layout of any complexity
- Website support (adding/editing functionality, fixing bugs)
I take my work seriously. I can create websites from scratch or build on a markup in Figma or PSD
I would be happy to work on your project and deliver everything to the highest standard.
Skills and abilities
Programming
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Databases & SQL
from 11 USD for hour
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HTML & CSS
from 7 USD for hour
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Javascript and Typescript
from 11 USD for hour
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Web Programming
from 11 USD for hour
Portfolio
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564 USD Light 2U
Web Programming
Light 2U - a company catalog website that deals with the sale and production of lighting fixtures. The site is fully ready and is currently being filled with content. In terms of technical aspects, it has: a catalog with a two-level category system, translation into 2 languages, an admin panel for content management, and much more!
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Charm AI
Javascript and Typescript
Charm AI - online Dating Assistant service. With its help, you can generate responses for messaging, ask for advice from AI, and also generate first messages (openers) for chat.
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226 USD Fabriq
Javascript and Typescript
A modern multilingual website developed for a company specializing in the creation and implementation of statues. The interface supports three languages (Polish, English, German), providing a convenient experience for a wide audience.
The project includes a responsive design, an interactive feedback form that simplifies communication with clients, and effective navigation. All components are optimized for fast performance, and the design aligns with modern trends and emphasizes the aesthetics of the company's products.
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677 USD Lumineka
Web Programming
Lumineka is a Ukrainian company that specializes in the production of lamps and accessories for them. The website has a catalog with convenient filters and an admin panel for content management.
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95 USD Ulethai
Web Programming
Ulethai is a Thai company that provides car rental services. The website includes filters, car search, booking, and much more.
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IQ Logic
Javascript and Typescript
IQ Logic - Fullstack Web Application for IQ testing. Its functionality includes: authorization, account generation, test, IQ calculation, paid subscription, online payment, paid trial period, and much more.
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Img2code
Web Programming
Img2code - a full-fledged Fullstack Web application. It is used for photo conversions, has accounts, subscriptions, credits, light and dark themes, browser fingerprint verification, live code snippets, and much more!
#web-programming #TailwindCSS #React/TypeScript #Next.js #zustand #Axios
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Next Movie
Web Programming
Next Movie - Fullstack cinema website. It has accounts, admin panel, movies, search, booking, viewing history, online payment, and many more cool features! #Next.js #React/TypeScript #tailwindcss #TypeScript #react/next #React-development
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Weather Guru
Javascript and Typescript
Weather Guru - an online service for viewing the weather. It has a built-in search between cities. #React/TypeScript #Styled-components #Axios
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Justy News
Javascript and Typescript
Justy News - an online portal for fresh news. There are light and dark themes, filtering, pagination, navigation, search, and much more! #React/TypeScript #typescipt #SASS(SCSS) #redux-toolkit #redux
Reviews and compliments on completed projects 5
8 May 2025
56 USD
Simple landing page
I contacted the performer with a task and was pleasantly surprised by the quality of work and speed of execution. The order was completed ahead of the agreed deadlines, which was a pleasant bonus. I especially want to note the excellent and prompt communication — always available, responds quickly to edits and suggestions. I am fully satisfied with the work, I recommend collaborating!
12 March 2025
101 USD
Need to finish the website on next.js+firebase
It is pleasant to work, only positive experience, the performer is well technically skilled.
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30 December 2024
327 USD
Site test page
Collaborating with you on the website creation was extremely productive and pleasant. You perfectly understood the specifics of our business and reflected all the key points that are important for our clients.
I really liked the speed of work execution, attention to detail, and flexibility in the approach to revisions. The website looks modern, convenient, and fully meets our expectations. Thanks to you, we now have a professional online platform that effectively presents our products and helps attract new clients.
Thank you sincerely for your responsibility and individual approach. I recommend you to everyone looking for a reliable partner for creating an effective web resource!
10 December 2024
30 USD
Integration of the website into Telegram Mini App.
Everything is okay
Was in contact
25 November 2024
138 USD
Website with an IQ test
Kostyantyn professionally and clearly handled the tasks and was always in touch! I recommend!
Activity
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Backend Developer (Node.js / NestJS)
1101 USD
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Full Stack Developer (React / Node / Next / Nest)
1101 USD
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Frontend Developer (React / Next.js)
825 USD
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Personal account based on the example https://www.searates.com/
251 USD
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Fix the errors on the website
95 USD
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New frontend based on Figma design for the gaming skins marketplace
900 USD
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Looking for an HTML layout designer
451 USD
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Freelance project
188 USD
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Layout of the design from Figma to HTML/CSS
16 USD
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Layout of the Figma mockup
45 USD
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