Oleksandr Zabolotnii
Offer Oleksandr work on your next project.
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Offer work 
Kyiv,
Ukraine
1 day 9 hours back
available for hire
2 Safes completed
3 months 13 days back
2 clients
8 proposals made
age 19 years
on the service 3 years
Rating
Successful projects
Average rating
Language proficiency level
Українська: fluent
English: intermediate
Skills and abilities
Portfolio
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Jewelry store - a fully functional application for electronic
Web Programming
Jewellery Store is a fully functional online store for jewelry products, built on React, TypeScript, Express, and MongoDB.
The goal of the project was to create a secure, scalable e-commerce platform with a modern user interface, reliable backend security, and rich functionality for users. The application includes user authentication using JWT and cookies, a shopping cart with global state management, product filtering and search, a blog with comments, and a personal user account.
… The main focus of the project was on security and performance. The backend implements rate limiting, protection against XSS, MongoDB sanitization, secure authentication, and HTTP header hardening. On the frontend, the user interface is fully responsive and optimized for usability using SCSS modules, Material-UI, and modern React templates.
This project demonstrates my ability to create production-ready e-commerce applications with clean architecture, secure backend logic, and an excellent user experience.
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Energy consumption management panel - web application for monitoring
Web Programming
Energy Dashboard is a fully functional web application for monitoring and managing data on energy consumption and production.
The goal of the project was to create a scalable dashboard with real-time data visualization, user management, and integration with external APIs for energy, weather, and environmental metrics.
… The system includes an admin panel for managing users, access modules, and API keys, as well as a user dashboard that displays electricity consumption and production, gas usage, CO₂ emissions, electric vehicle charging stations, and weather data.
The main challenges included processing complex data streams, secure authentication, role-based access control, and integration with an external API based on GraphQL (Censo). These were addressed using a Node.js/Express backend with MongoDB, JWT authentication, and a modern React + TypeScript frontend with dynamic charts and animations.
This project demonstrates my ability to create complex, production-ready web applications with clean architecture, secure backend logic, and an interactive, responsive user interface.
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750 USD Uptime Sentinel (monitoring system)
Web Programming
Uptime Sentinel is a fully functional monitoring system designed to track uptime, latency, and performance of websites and APIs in real-time. I developed both the frontend (Next.js, React, TypeScript, Tailwind, Framer Motion, Recharts) and the backend (NestJS, Node.js, PostgreSQL, Redis, BullMQ, WebSocket, JWT authentication, Telegram notifications).
The project includes real-time dashboards, alarm notifications, detailed analytics, CSV/PDF export, and a microservices-based architecture for scalability. The main challenges were real-time updates, data visualization, and maintaining high performance, which I addressed through optimized queries, WebSocket integration, and clean modular code.
… This project demonstrates my ability to create production-ready, scalable, and interactive fully functional applications with real-time capabilities and a robust architecture.
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Website for purchasing fan tokens of football clubs
Web Programming
This is a responsive multi-page website created for purchasing fan tokens for a football club. The site is developed using React (with Vite), and it uses react-router-dom for routing, react-hook-form for handling forms, and SCSS for styling.
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Online calculator
Web Programming
This project is an online calculator with the ability to change the theme (light/dark), save the selected theme in localStorage, display the exact time, and perform basic mathematical operations. The calculator also supports working with fractional numbers, allows clearing input fields, and displays the result of the last operation.
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[Full stack]Furniture Store
![[Full stack]Furniture Store — example of freelancer's portfolio work in category](https://content.freelancehunt.com/cdn-cgi/image/format=auto,fit=crop,width=250,dpr=1,gravity=top,height=250/snippet/84339ee0-07ac-44d5-bc5c-99a4c6d134df/1940725/%D0%97%D0%BD%D1%96%D0%BC%D0%BE%D0%BA%20%D0%B5%D0%BA%D1%80%D0%B0%D0%BD%D0%B0%202025-05-14%20020952.png)
Furniture Store - is a modern online furniture store built on Next.js. Users can browse the catalog, add items to the cart, sort by price, check delivery, and log in. Responsive layout and smooth animations are implemented to enhance the user experience.
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Website of the sports club
Web Programming
This project is my first non-responsive website for a sports club, created using React (Vite). The website is developed using SASS and contains information about the club's services, coaches, training schedule, and contact information.
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Vegetable delivery website
Web Programming
This project is a fully responsive vegetable delivery website, created using React (Vite) and SCSS. The site features a clean and responsive layout using responsive units of measurement (such as rem, em, vw, vh), media queries for different screen sizes, a dropdown menu, and a burger menu for small devices.
Reviews and compliments on completed projects 2
19 February
27 USD
Bot
Quality
Professionalism
Cost
Contactability
Deadlines
I recommend Oleksandr - he immediately took on the work and completed it promptly.
Oleksandr Grischenko
| Personal | Response review
18 August 2025
175 USD
Assemble an online store according to the design from Figma
Quality
Professionalism
Cost
Contactability
Deadlines
The work is done, everything went smoothly.
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