Hi, I'm
Ustym Kushnir
5+ years building scalable web apps, DeFi protocols, and AI-powered systems — from Mykolaiv, Ukraine.
About Me
Professional Summary
Experienced Full-Stack Developer with expertise in React, Node.js, Python and Next.js. Skilled in blockchain, AI integration, and payment systems.
Delivering production-ready systems across healthcare, fintech, and Web3.
Full-Stack Expertise
React, Next.js, Node.js, NestJS, Python, Laravel — production-grade across the full stack.
Blockchain & Web3
Solidity smart contracts, ERC-20/721 tokens, Polygon PoS, Solana SPL — DeFi from scratch.
AI Integration
OpenAI, Gemini, LangChain, Whisper, Stable Diffusion — shipping AI-powered products.
Cloud & DevOps
AWS, Docker, GitHub Actions, Vercel — scalable, containerised, CI/CD-ready infrastructure.
Payments & SaaS
Stripe, Mercado Pago, PayPal — multi-tenant SaaS with subscription management.
Professional Summary
Experienced Full-Stack Developer with expertise in JavaScript, React, Node.js, Python, PHP, Laravel, Vue, and Next.js. Skilled in blockchain development, AI tool integration, and payment gateway integration.
Delivering production-ready systems across healthcare, e-commerce, fintech, and blockchain.
Full-Stack Expertise
React, Next.js, Node.js, NestJS, Python, Laravel — production-grade across the full stack.
Blockchain & Web3
Solidity smart contracts, ERC-20/721 tokens, Polygon PoS, Solana SPL — DeFi from scratch.
AI Integration
OpenAI, Gemini, LangChain, Whisper, Stable Diffusion — shipping AI-powered products.
Cloud & DevOps
AWS, Docker, GitHub Actions, Vercel — scalable, containerised, CI/CD-ready infrastructure.
Payments & SaaS
Stripe, Mercado Pago, PayPal — multi-tenant SaaS with subscription management.
Tech Arsenal
A comprehensive toolkit built over 5+ years of production development across full-stack, blockchain, and AI domains.
Frontend
- React
- Next.js
- Vue.js
- Redux
- TailwindCSS
- TypeScript
Backend
- Node.js
- Express.js
- NestJS
- Python
- PHP
- Laravel
Blockchain
- Solidity
- ERC-20/ERC-721
- Polygon PoS
- Web3.js
- Chainlink
- Solana / SPL
AI & Automation
- OpenAI API
- LangChain
- Stable Diffusion
- Gemini AI
- Whisper
Databases
- PostgreSQL
- MongoDB
- MySQL
- Redis
DevOps & Cloud
- Docker
- AWS (EC2, S3)
- GitHub Actions
- Vercel
- Cloudflare
Payment Systems
- Stripe
- PayPal
- Mercado Pago
Security
- JWT
- OAuth 2.0
- Helmet.js
- Input Validation
Frontend
- React
- Next.js
- Vue.js
- Redux
- TailwindCSS
- TypeScript
Backend
- Node.js
- Express.js
- NestJS
- Python
- PHP
- Laravel
Blockchain
- Solidity
- ERC-20/ERC-721
- Polygon PoS
- Web3.js
- Chainlink
- Solana / SPL
AI & Automation
- OpenAI API
- LangChain
- Stable Diffusion
- Gemini AI
- Whisper
Databases
- PostgreSQL
- MongoDB
- MySQL
- Redis
DevOps & Cloud
- Docker
- AWS (EC2, S3)
- GitHub Actions
- Vercel
- Cloudflare
Payment Systems
- Stripe
- PayPal
- Mercado Pago
Security
- JWT
- OAuth 2.0
- Helmet.js
- Input Validation
All technologies at a glance
Work Experience
Kyiv, Ukraine
Full-Stack Developer
- Created and delivered custom web applications, AI tool integrations, and automation solutions for clients across multiple industries.
- Leveraged React, Node.js, Python, and Laravel to drive digital transformation for enterprise clients.
- Implemented scalable, cloud-based solutions that optimized workflows and ensured data security.
- Collaborated with cross-functional teams to integrate modern tech into SaaS platforms.
- Key role in SaaS multi-tenant architectures, subscription management, and service reliability.
Remote
Blockchain & Smart Contract Developer
- Launched the Vetra (VTR) stablecoin on Polygon PoS with Chainlink Functions for real-time proof-of-reserves verification.
- Developed and deployed ERC-20 tokens with integrated smart contracts on Polygon for fintech and SaaS clients.
- Ensured highest security standards: role-based access control, pausable contracts, full transparency events.
Featured Projects
Production projects spanning AI, blockchain, SaaS, ERP systems, and algorithmic trading.
BookProof
AI-powered automated proofreading & editing platform with real-time text enhancement, secure JWT/OAuth auth, and scalable MongoDB backend.
Gretta's Mascotas ERP
Comprehensive ERP for pet store chains with offline sync, multi-branch support, mobile-friendly POS, and automated inventory management.
Apoteka24
Pharmacy discovery platform for Montenegro with advanced filtering, real-time availability, bilingual interface, and Google Maps integration.
EduTrack LMS
Learning Management System with teacher/student dashboards, assignment management, grading, and attendance tracking.
DexSpeed DEX
High-speed decentralized exchange for EBK and SPL tokens on Solana — optimized for low-fee, real-time trading with WebSocket updates.
Vectux AI
AI-powered education platform with personalized course recommendations, real-time progress tracking, and responsive design for mobile & desktop.
LINCE Monitoring
Platform for water system monitoring with configurable inspections, AI anomaly detection, real-time reporting, and Chart.js visualizations.
Predia Digital
Multi-tenant SaaS for sports facility management with AI-powered WhatsApp support, real-time booking, proactive resale engine, and Mercado Pago.
Agendux
Appointment booking SaaS for health & beauty professionals with WhatsApp reminders, Google Calendar sync, and Mercado Pago subscriptions.
MT5 Trading Bot
Fully automated trading bot for MetaTrader 5 with RSI, MACD, EMA multi-timeframe strategy, news filter, backtesting, and a risk management dashboard.
Blockchain & Web3
From stablecoin launches to DEX development — building the decentralised future with security-first smart contract architecture.
Vetra (VTR) Stablecoin
Polygon PoS + Chainlink
Launched a stablecoin with real-time proof-of-reserves verification via Chainlink Functions.
ERC-20 Token Deployments
Multiple Clients
Developed and audited ERC-20 tokens with role-based access control and pausable mechanisms.
DexSpeed DEX on Solana
SPL Token Exchange
Built a high-throughput DEX for trading EBK and SPL tokens with sub-second latency.
Vetra (VTR) Stablecoin
Polygon PoS + Chainlink
Launched a stablecoin with real-time proof-of-reserves verification via Chainlink Functions.
ERC-20 Token Deployments
Multiple Clients
Developed and audited ERC-20 tokens with role-based access control and pausable mechanisms.
DexSpeed DEX on Solana
SPL Token Exchange
Built a high-throughput DEX for trading EBK and SPL tokens with sub-second latency.
Blockchain Stack
Security-First Approach
AI & Automation
Integrating cutting-edge AI models into production systems — from intelligent customer service bots to anomaly detection platforms.
AI-driven text analysis, proofreading, and personalized course recommendation engines.
WhatsApp audio message interpretation and automated sports facility reservation management.
RAG pipelines and agent orchestration for anomaly detection and educational content curation.
Real-time audio transcription for voice-based customer service automation over WhatsApp.
Generative image pipelines integrated into client-facing creative tools.
AI-First Development
Every product I build considers AI augmentation from day one — not as an afterthought, but as a core architectural pillar.
AI-driven text analysis, proofreading, and personalized course recommendation engines.
WhatsApp audio message interpretation and automated sports facility reservation management.
RAG pipelines and agent orchestration for anomaly detection and educational content curation.
Real-time audio transcription for voice-based customer service automation over WhatsApp.
Generative image pipelines integrated into client-facing creative tools.
AI-First Development
Every product I build considers AI augmentation from day one — not as an afterthought, but as a core architectural pillar.
Integrations & APIs
Algorithmic Trading Bot
MT5 Trading Bot
MetaTrader 5 · Python Automation
A fully automated trading bot executing a complex multi-indicator strategy on MetaTrader 5. Built with dual-bot architecture — separate buy and sell engines — for cleaner logic and isolated performance tracking. Includes real-time news filtering to avoid high-impact events.
Education & Certifications
Academic Degree
Bachelor's in Software Engineering
National University of Life and Environmental Sciences of Ukraine (NUBiP) ↗Statistics · Kyiv, Ukraine
Strong foundation in algorithms, data structures, computer networks, databases, and software engineering principles — applied across 5+ years of professional work.
Certifications
Certified Blockchain Developer
JavaScript Algorithms & Data Structures
freeCodeCamp – Responsive Web Design
Keeping up with the latest in AI/LLMs, zero-knowledge proofs, Layer 2 scaling solutions, and modern React patterns.
Languages
English
Professional Working Proficiency
Ukrainian
Native Speaker
Get In Touch
Available for freelance projects, full-time roles, and blockchain/AI consulting. Let's build something great together.
Contact Details
Open to remote opportunities worldwide