Switch to English?
Yes
Переключитись на українську?
Так
Переключиться на русскую?
Да
Przełączyć się na polską?
Tak
  1. Freelancers

Denis Harkovsky

Offer Denis work on your next project.

Ukraine Kharkiv, Ukraine
2 months 26 days back
Available for hire available for hire
age 22 years
on the service 2 years
Freelancer Denis H. — Ukraine, Kharkiv. Core skill — Bot Development, Web Programming

Rating

Successful projects
No data
Average rating
No data
Rating
187
Bot Development
736 place out of 1963
Web Programming
3029 place out of 6548

Language proficiency level

Українська Українська: upper-intermediate

Skills and abilities

Programming

Design & art

Services


Photo, Audio & Video

Promotion

Administration


Translation

Writing

Portfolio


  • 223 USD

    Example of work

    HTML & CSS
    Example of work — example of freelancer's portfolio work in category HTML & CSS
    Development of a modern adaptive website / web platform turnkey

    I specialize in developing modern web projects with a focus on performance, architecture, and user experience.

    … I create fully interactive web solutions that look expensive, work quickly, and scale according to business needs.

    What I implement:
    • Adaptive websites and web applications (Mobile / Desktop)
    • Advanced UI/UX with animations and smooth transitions
    • Interactive interfaces with deep logic
    • Telegram bots + Mini Apps with web integration
    • WebSocket systems (real-time: chats, notifications)
    • API integrations (payments, maps, third-party services)

    The technical level of the project includes:
    • Clean project architecture (separation of logic, components)
    • Load optimization (lazy loading, resource minimization)
    • High speed (Lighthouse 90+ with proper build)
    • Custom interface logic (not templates, but manual implementation)
    • Working with UI states (menus, modal windows, interactive)
    • Cross-browser compatibility and stability on all devices

    Using:
    • HTML5 / CSS3 / JavaScript (ES6+)
    • React / Next.js (if needed)
    • WebSockets / REST API
    • Vercel / Docker / GitHub

    The feature of my work is to think through the entire user journey, visuals, speed, and scalability of the project.

    Suitable for:
    — startups
    — businesses
    — gaming and social projects
    — Telegram ecosystems

    Ready to implement the project turnkey: from idea to launch and support.

  • Page design - websites, content creation

    Web Design
    Page design - websites, content creation — example of freelancer's portfolio work in category Web Design
    I design any pages and websites, adapting to the categories of pages - websites

    https://hrdk.company.site/

    … https://www.instagram.com/let.s_brunch/

  • Management of radio stations - connection of servers

    Web Programming
    Management of radio stations - connection of servers — example of freelancer's portfolio work in category Web Programming
    Creating a radio station - design, live broadcasting - connecting to the stream.

  • HRDK Project

    Javascript and Typescript
    HRDK Project — example of freelancer's portfolio work in category Javascript and Typescript
    Game currency store and bot project work

    The site is written in js, html, css

Activity

  Latest proposals 7
Telegram Mini App
573 USD
Edit the ready VPN bot
113 USD
Good afternoon, launch, rewrite, and integrate the ready-made bot with the use of
111 USD
Assistant for filling out Excel tables (information search, copy-paste, dropdown menus)
22 USD
It is necessary to implement a Telegram bot for a restaurant
31 USD
Price list excel word
33 USD
Set up lead conversion transfer from Telegram bot (via SendPulse) to Facebook Ads through CAPI
150 USD