Oleksii Chaikovskyi
Offer Oleksii work on your next project.
Private message
Offer work
Cluj-Napoca,
Romania
1 month 1 day back
a little busy
age 29 years
on the service 4 years
Rating
Successful projects
Average rating
Language proficiency level
English: upper-intermediate
CV
I'm full stack developer with extensive experience in creating web applications and unique expertise in developing encryption systems.
Back-end
- C# (ASP.NET, Blazor, Razor Pages)
- Python (Django)
- Node.JS (Express)
Front-end
- javascript/typescript (preferably TS)
- Tailwind CSS, Daisy UI, Hyper UI, Bootstrap
- Svelte kit, React
- Avalonia UI (cross-platform desktop lib), Guna2 UI (for microsoft) and SWIFT (for macOs and IOS)
Databases
- MongoBD
- Microsoft SQL
- Dapper
- MySQL
- SQLite
- PostrgeSql
- Entity Framework, Django ORM, Sequelize, Mongoose, LINQ to SQL
Skills and abilities
Programming
Design & art
Mobile development
Administration
Writing
Portfolio
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116 USD Smart Grocery & Expense Tracker with Telegram Login
Bot Development
I developed a lightweight web application that helps my family track purchases, analyze store prices, and optimize shopping lists.
The system uses Telegram authentication, so users can log in instantly without creating accounts or remembering passwords.
… Key features:
• Quick receipt entry with stores, products, and categories
• Automatic price tracking across different shops
• Smart shopping list analysis that finds the cheapest store
• Shopping lists sent directly to Telegram
• Mobile-friendly interface for use while shopping
Built with modern technologies including SvelteKit, TypeScript, PostgreSQL, and Telegram Bot API.
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7350 USD Parcel Route Driver
Hybrid Mobile Apps
Parcel Route Driver is a mobile-first delivery app for couriers that turns a chaotic day of stops into a clear, optimized route with real-time progress tracking.
The core value of ParcelRoute is smart route optimization that helps drivers:
* Follow the most efficient stop order to reduce mileage and wasted time
… * Avoid unnecessary backtracking across the city
* Stay focused on deliveries instead of manual planning
Drivers receive a ready-to-go route with a clear sequence of stops, estimated progress, and quick actions to keep moving.
ParcelRoute Driver provides a fast, clean workflow for daily operations:
* Today view with shift KPIs: stops left, delivered, issues, and ETA
* Route view with an interactive map, stop markers, and a full route overview
* Stop actions designed for speed: Arrived, Delivered, Issue, Skip
* Parcel list with filters (Pending / Delivered / Issues) and quick jump to the related stop
* iPad split layout for in-vehicle usage: list on the left, map and details on the right
Real-World Ready Features:
* Offline mode support to keep working in low-signal areas
* Sync queue for updates made during offline operations
* Designed to scale with features like proof of delivery, scanning, notifications, and advanced constraints (time windows, priorities, capacity)
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16 656 USD AI-Assisted Binance Futures Trading Bot
Web Programming
Production-grade .NET 8 console trading bot for Binance USDⓈ-M Futures that can automatically open and manage trades based on AI-assisted signals and strict risk rules. Designed with a clean, modular architecture suitable for real deployment on a VPS.
What it does?
* Fetches real-time market data from Binance Futures (candles, ticker, order book, exchange info).
… * Sends a structured market snapshot to OpenAI API to generate a trade signal (LONG / SHORT / NO_TRADE).
* Validates every signal with a Risk Engine (outside of the exchange API).
* If approved, the bot opens a position automatically, and places Stop-Loss + Take-Profit orders immediately.
* Tracks state, decisions, and execution results with robust logs and persistence.
Key Features
* Automatic Trade Execution (Hands-Off)
* Risk Management Outside the Exchange API
* Binance Futures Integration
* OpenAI Integration (AI Signals with Strict Validation)
* Observability & Audit Trail
Stack
* .NET 8, C#
* Binance Futures REST (optionally WebSocket user stream)
* OpenAI API
* SQLite / file-based persistence (state + decisions)
* Serilog
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4974 USD Stripe Admin Dashboard & Connect Platform
Web Programming
This project is a custom-built Stripe Admin Dashboard designed to fully manage a Stripe Connect platform.
It replicates and extends Stripe’s native dashboard functionality, providing a clear, business-oriented interface for managing payments, connected accounts, payouts, webhooks, and financial flows.
The system is built as a production-ready architecture, not a UI mock - all core Stripe concepts are modeled and handled end-to-end.
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6639 USD Beauty Salon CRM & Analytics Platform
Web Programming
This project is a custom-built CRM platform for beauty salons, designed to manage daily operations, staff, finances, and client relationships in a single system.
The platform focuses not only on scheduling and administration, but also on data analysis and business insights, helping salon owners make informed decisions based on real metrics - not intuition.
… Appointments & Operations:
* Calendar-based appointment management (day / week views)
* Fast booking flow for receptionists
* No-show, deposit, and cancellation tracking
* Master schedules and workload visibility
* Real-time operational overview for admins
Masters & Staff Management:
* Payroll calculation (commission + bonuses + fixed pay)
* Transparent payout breakdowns
* Activity history per master
Client CRM:
* Centralized client database
* Visit history and spending tracking
* Client segmentation
* Retention analysis
* Client notes and preferences
Finance & Inventory:
* Revenue, expenses, and profit tracking
* Daily and monthly financial summaries
* Expense categorization (rent, supplies, payroll, marketing)
* Payroll forecasting
* Consumables inventory
A core focus of the system is analytics and business intelligence:
KPI dashboards:
* Revenue per day / month
* Average ticket size
* Appointment volume
* No-show rate
Client analytics:
* Retention and churn risk
* Repeat visit frequency
* Client cohorts over time
Financial analytics:
* Revenue vs expenses trends
* Profit margin analysis
* Expense structure breakdown
Master performance analytics:
* Revenue per master
* Client return rate
* Utilization and workload balance
All analytics are designed to be actionable, helping salon owners improve profitability, retention, and operational efficiency.
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4193 USD Real Estate Agency Management Web App
Web Programming
Client request: build a single internal web app where the agency can manage clients, agents, and apartment listings (both for sale and for rent) without juggling spreadsheets, chats, and separate tools - with fast filtering, clear statuses, and quick day-to-day operations.
What this solution simplified: it centralized the workflow into one system: agents can instantly see who is responsible for each client/listing, track lead progress, keep preferences and notes in one place, and work from a dashboard that highlights what needs attention (new leads, scheduled viewings, negotiations, and closed deals). The result is less manual coordination, fewer missed follow-ups, and faster matching between clients and available apartments.
Key features
… * CRM-style client management: lead statuses, intent (buy/rent), budget, notes, last touch, quick actions
* Agent management: profiles, roles, workload and performance overview
* Apartment inventory: sale/rent listings, statuses (available/reserved), key attributes, matching clients to listings
* Dashboard: pipeline snapshot, activity feed, inventory insights
* Responsive UI and clean layout for daily operations
Tech stack
* Backend: ASP.NET Web API (C#), Clean Architecture
* Database: PostgreSQL, Entity Framework Core
* Frontend: SvelteKit, TypeScript, clean HTML/CSS
* Data layer: Axios, TanStack Query (server-state, caching, refetching)