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  1. Freelancers

Oleksandr Dendeberya

Offer Oleksandr work on your next project.

Ukraine Kharkiv, Ukraine
5 months 22 days back
Available for hire available for hire
on the service 4 years
Freelancer Oleksandr D. — Ukraine, Kharkiv. Core skill — Java, Web Programming

Rating

Successful projects
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Average rating
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Rating
318
Java
81 place out of 781
Web Programming
1716 place out of 6430

CV

I’m a Full Stack Developer with over 6 years of programming experience and 3+ years of professional work building scalable web and mobile applications.
My core expertise lies in Java (Spring Boot) on the backend and React / React Native / Next.js on the frontend.

I create clean, reliable solutions — from backend APIs and automation scripts to modern, responsive interfaces.
I’ve also worked extensively with Python, TypeScript, and workflow automation tools like n8n, Google Apps Script, and Telegram bots.

My skills:

  • Backend: Java, Spring Boot, Node.js, Python

  • Frontend: React, React Native, Next.js

  • Databases: PostgreSQL, MySQL, Firebase

  • API integrations and automations

  • Deployment: Docker, AWS, Vercel

I value clear communication, clean code, and on-time delivery. Let’s build something great together!

Skills and abilities

Programming

Design & art

Services


Photo, Audio & Video

Mobile development

Writing

Portfolio


  • The image Uploader

    Web Programming
    Fullstack web application that allows to upload/download user profiles images. Uses Amazon S3 storage. Backend is created by Spring. Frontend is written on React

  • Product Gallery Fullstack

    Web Programming
    Product Gallery Fullstack — example of freelancer's portfolio work in category Web Programming
    Fullstack web application that allows filtering, searching, role-based JWT authentication, admin panel. Backend is created by Spring. Frontend is created by React

  • Stop Gaming Telegram Notification Bot

    Bot Development
    Telegram Bot parses news from website about games and sends notifications to subscribers.

  • GPU Parser Telegram Bot

    Bot Development
    GPU Parser Telegram Bot — example of freelancer's portfolio work in category Bot Development
    Telegram Bot written by Spring and Java Telegram Bots library. Bot has scheduling, parsing and sending messages to telegram chats.

  • Food Delivery Website

    Javascript and Typescript
    Food Delivery Website — example of freelancer's portfolio work in category Javascript and Typescript
    Website created with HTML, CSS and JS. Uses data from JSON files.

  • Server Manages Fullstack

    Web Programming
    Server Manages Fullstack — example of freelancer's portfolio work in category Web Programming
    Fullstack Web Application with backend written on Spring. Frontend is created by React

  • Cryptocurrency React

    Web Programming
    Cryptocurrency React — example of freelancer's portfolio work in category Web Programming
    Responsive React web application uses Rapid API to fetch cryptocurrencies and news

  • The Gericht Restaurant Website

    Web Programming
    The Gericht Restaurant Website — example of freelancer's portfolio work in category Web Programming
    React restaurant responsive website

  • Portfolio

    Web Programming
    Portfolio — example of freelancer's portfolio work in category Web Programming
    Portfolio
  • 11 USD

    Parker Internet Store

    Java
    Complete real order of the parser with a graphic interface. The user chooses the category for parsing, the program pars the card into the XLSX file.

Activity

  Latest proposals 10
Written by
45 USD
You need to create a website that will support Paypal.
400 USD
Telegram BOT – The Remembrance Bot
45 USD
Creation of 2 Visit Cards
181 USD
The Telegram Bot for Playing
113 USD
Integration of chatgpt and telegram bots
20 USD
Sparsit/crypt the base of dental clinics and offices
68 USD
Parser of text files in the base
68 USD
Parcing data from the internet store
23 USD
Telegram chatbot (the stock market with accounts and user ratings).
23 USD