Sergey Naumenko
Private message 
Offer work 
Kyiv,
Ukraine
a little busy
Rating
Language proficiency level
Українська: fluent
Русский: advanced
English: upper-intermediate
Čeština: pre-intermediate
CV
Full-Stack Developer | React, UI, Web Applications & Automation
Hi! I’m a Full-Stack developer with experience in building websites, interactive interfaces, admin panels, bots, and automation tools. I work with both frontend and backend, helping turn ideas into working products and improving existing solutions.
My main focus is architecture, user-friendly interfaces, stable application performance, and practical results. I can understand and work with existing codebases, find and fix bugs, improve logic, adapt designs for different devices, and build functionality for specific business needs.
Technical areas:
- Frontend: React.js, JavaScript, HTML, CSS, Tailwind CSS, responsive layout, SPA.
- UI/UX: creating user-friendly interfaces, working with forms, user/admin dashboards, and interactive elements.
- Backend & Logic: APIs, data handling, server-side logic, integrations, and process automation.
- Practical Development: bug fixing, performance improvements, maintaining existing projects, and launching MVPs.
I’m interested in thinking through the logic, structure, and user flow of a product, and bringing it to stable working condition.
Skills and abilities
Programming
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Bot Development
from 45 USD for project
- C & C++
- C#
- Cryptocurrency & Blockchain
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Gaming Apps
from 335 USD for project
- HTML & CSS
- Javascript and Typescript
- PHP
- Python
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Web Programming
from 112 USD for project
Design & art
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Web Design
from 67 USD for project
Services
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Website Development
from 112 USD for project
Portfolio
- All works 6
- Gaming Apps 2
- Website Development 1
- App Development for Android 1
- HTML & CSS 1
- Bot Development 1
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380 USD Telegram bot for information analysis of Binance Futures
Bot Development
Developed an informational Telegram bot for analyzing Binance futures markets. The bot retrieves public market data, analyzes currency pairs, and generates clear signals in the format of Long / Short / No Trade with probabilities, risk levels, and explanations of reasons.
@Umkas_Binance_info_bot
… Main functionality:
- Analysis of Binance futures pairs;
- Assessment of Long and Short scenario probabilities;
- Brief market overview;
- Price levels, ATR, scenario targets, and idea cancellation zone;
- Risk context and warnings;
- Comparison of multiple timeframes;
- Scanning active markets;
- History of saved signals;
- Statistics and verification of previous scenarios;
- Convenient Telegram menu with sections, transitions, and back navigation.
The bot does not open trades, does not use private Binance API keys, and operates as an analytical tool for obtaining market information. All signals are informational and do not constitute financial advice.
Stack:
Python, aiogram, SQLite, Binance Futures Public API.
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1000 USD DiaApp — Android application for monitoring glucose and managing diabetes
App Development for Android
Native Android application for people with type 1 and type 2 diabetes. Developed from scratch in Kotlin + Jetpack Compose.
Functionality:
— Dashboard with real-time glucose graph (Vico)
— AI food scanner: photo → nutrients → CHO (Claude Vision API + CameraX + ML Kit)
… — Bolus calculator considering IOB and current glucose
— Insulin and nutrition diary
— Analytics: TIR, average glucose, GMI
— Support for Dexcom and LibreLinkUp CGM
— Follower mode (Supabase Realtime)
— Predictive hypo/hyper alerts
— Dark theme, Home Screen Widget (Glance)
— Premium subscription ($12.99/month, $99.99/year)
Stack: Kotlin, Jetpack Compose, Hilt, Room, Retrofit, Supabase, Firebase, WorkManager, CameraX, Health Connect
Status: published on Google Play (Internal Testing)
#android #kotlin #compose #medicine #diabetes
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8000 USD Slime Clan Wars — a gaming RPG system with combat, a hub, and evolution!
Gaming Apps
Still in development! Pre-release version! Stable PC gameplay!
Slime Clan Wars — a game project in the action/RPG genre about an evolving slime. The project implemented key game screens and systems: combat runtime with waves of enemies, hub interface, world map, battle preparation, character progression, and visual structure of the slime.
I worked on the architecture of game screens, adapting the interface for different resolutions, transferring mechanics between project versions, and visual assembly of the character. A layered model of the slime was developed separately: body, eyes, shadow, highlight, aura, and internal plasma.
…
Key tasks:
#GameDev #React #RPG #UI #GameUI #JavaScript
- development of game interfaces;
- setting up the hub screen and world map;
- working with combat logic and battle preparation;
- character evolution and enhancement system;
- adapting UI for different resolutions;
- visual assembly of the slime character;
- transferring and structuring game mechanics.
Technologies: React, JavaScript, UI Toolkit.
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1117 USD TGDozer — SaaS platform for Telegram marketing
Website Development
Fully functional web service for automating work with Telegram audiences. Built from scratch as a commercial product with a subscription model.
Stack
Frontend: React 18 + TypeScript, Vite, Tailwind CSS, React Router, Zustand, Recharts
… Backend: Python, FastAPI, SQLAlchemy (async), Celery + Redis, Pyrogram (Telegram MTProto)
Infra: Docker Compose, Nginx, PostgreSQL, two production servers with CI deployment via Paramiko/SFTP
Functionality
Audience parser — collection of group members, commentators, reactions (grouped by emoji), authors by keywords, checking username lists, CSV import
Mailings — mass sending of messages to the collected audience with media attachments and templates
Invitations — automatic addition of contacts to groups/channels after parsing
Scheduler — delayed message sending
Forwarding — forwarding messages between channels with filtering
Monitoring — tracking keywords in Telegram in real-time
Statistics — activity graphs by dates, channels, task types
Subscriptions and payments — tariff plans, payment in cryptocurrency (USDT/TRC-20), manual confirmation by admin and Monobank
Admin panel — user management, tariffs, payments, manual sending of notifications
Implementation features
Multi-account support — connecting multiple Telegram accounts via QR/SMS authorization
Asynchronous task queue (Celery) with auto-notifications upon completion
JWT authorization with refresh tokens
Fully responsive UI (mobile + desktop)
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Reactor Meltdown
Gaming Apps
Arcade head-on puzzle in the aesthetic of a cyberpunk terminal. The player is a quantum reactor operator; on a grid of 12 terminals, one lights up at random moments, and it must be pressed before the timer resets. With each successful press, the reaction time decreases, the neon color mutates, and the interface briefly "glitches" — the system visually begins to lose stability along with the player.
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11 USD Website for Provider Customers
HTML & CSS
The site is made exclusively according to the customer's wish.
Simple version of html + bootstrap 4. Animation when pointing on the buttons, the curve color (moving the ball to the contour, a signal to the cable).
It was made in the far year 2017.
Reviews and compliments on completed projects 6
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Real expert -
Craft master -
Quick answers -
First-class quality -
Nice communication -
High responsibility -
Great price -
Lightning fast
13 June
45 USD
S1GG1L
He did it quickly and beautifully. He responded quickly to all points!
|
7 June
134 USD
Topic: ERP system for hospital management
everything is great) fast work and revisions.
30 May
56 USD
Додаток для вимірювання пульсу та тиску. Етап #2
The project was completed quickly and with high quality. A bonus in the form of a landing page was also provided, screenshot attached. Unmatched high quality of work, analysis of the technical specifications, and a fast, most importantly, quality result.
28 May
112 USD
Додаток для вимірювання тиску та пульсу через камеру
As always, very quickly and professionally. After the successful completion of the task, two additional improvement stages were added regarding the integration of this application into the company's ecosystem.
27 May
112 USD
Main app
The deadlines and technical level are impressive. The performer tested the protocol by interacting with an emulator and a desktop application analog, which significantly facilitated and accelerated the work. 10 out of 10.
Very professional and fast. I am pleasantly impressed with the execution of the task.
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