Вікторія

VIKTORIIA CHORTOK
Kyiv, Ukraine (Remote) [open contact info](look above in the "contact info" section) github.com/lunariavanzetti
English B2 youtube.com/@ViktoriaChortok9 preply.com/en/tutor/3592180

Junior Full-Stack Developer — React · Node.js · JavaScript · AI Integration

PROFILE
Full-stack developer with production experience shipping React and Node.js applications end-to-end — from UI to backend,
database, auth, payments, and deployment. Built multiple live SaaS products from scratch including a video generation platform
(kateriss.space) and an AI customer support platform (romashkaai.vercel.app). Strong JavaScript and TypeScript foundation
across both frontend and backend. Additional depth in Python, AI/LLM integration, RAG pipelines, and automation — brings AI
capabilities into products as a natural extension of the stack. Motivated to grow fast, learn from senior engineers, and work
beyond typical junior-level tasks.

SKILLS
Frontend Deployment & tools
React 18, Next.js 14 (App Router), TypeScript, JavaScript Vercel, Render, Railway; Git / GitHub; Docker basics; Cursor,
(ES6+), Tailwind CSS, Framer Motion, Shadcn/ui, Recharts — Claude Code, GitHub Copilot — AI-assisted development daily
production UI built from scratch
Mobile
Backend & APIs Swift (iOS) — native app built from scratch with SwiftUI and
Node.js, Python (FastAPI); REST API design; PostgreSQL, AVFoundation
MongoDB, Supabase; SQL; JWT / OAuth; Stripe (webhooks,
subscriptions); Telegram Bot API Additional
Automation pipelines (n8n); CRM integrations (HubSpot,
AI & LLM integration GoHighLevel); Google Ads / Facebook Ads; technical
OpenAI / Claude / Gemini APIs; RAG pipelines; LangChain, documentation; English B2
LangGraph; prompt engineering; AI agents; Pinecone (vector
DB); n8n workflow automation

EXPERIENCE
Independent Full-Stack Developer 2023 – Present
Freelance · Remote · Multiple production applications shipped
– Built and shipped multiple full-stack products independently using React, Next.js 14 (App Router), TypeScript, Node.js, and
Supabase (PostgreSQL) — from UI to backend, auth (OAuth + JWT), payments (Stripe), and deployment (Vercel).

– Kateriss AI (kateriss.space): text-to-video SaaS — React + TypeScript frontend, Supabase backend, Google Veo 3 API
integration, Stripe subscription billing, real-time generation queue, user video library.

– Romashka AI (romashkaai.vercel.app): AI customer support SaaS — Next.js 14 full-stack, RAG pipeline with OpenAI +
Pinecone, real-time Supabase chat, HubSpot CRM integration, multi-tenant architecture with Row Level Security.

– Built native iOS application in Swift (SwiftUI + AVFoundation) from scratch — circular video recording app with clean
separation of UI and logic layers.

– Integrated AI features across all products: LLM APIs, RAG pipelines, LangChain, LangGraph multi-agent systems,
Telegram bots — AI integration is a standard part of the development process.

– Ran own Google Ads and Facebook Ads campaigns for SaaS products — tracked conversion metrics, optimised spend, and
analysed performance data.

Mathematics Tutor — University Level 2022 – Present
Preply · Remote · 4,363 lessons · 4.8 / 5.0 · 20+ countries · English
– 4+ years of structured async remote work: self-managed, deadline-driven, zero supervision — strong discipline and
accountability.

– Maintains active mathematical foundations (statistics, calculus, linear algebra) — applied directly to understanding AI/ML
systems at a deeper level.

Education & project portfolio on following page | github.com/lunariavanzetti | youtube.com/@ViktoriaChortok9

VIKTORIIA CHORTOK Education & Project Portfolio

EDUCATION & DEVELOPMENT

University — Web Development track (withdrew after first year) 2023
Self-directed: React, Next.js, Node.js, TypeScript, Hands-On Machine Learning (Géron), AI agent architecture, FastAPI.
Currently enrolled: senior-level cryptology and trading course — applied quantitative analysis and automated strategy design.
YouTube: youtube.com/@ViktoriaChortok9 GitHub: github.com/lunariavanzetti
Preply: preply.com/en/tutor/3592180

PRODUCTION PROJECTS

Romashka AI — AI Customer Support SaaS romashkaai.vercel.app
Next.js 14, React, TypeScript, Tailwind CSS, Supabase (PostgreSQL + Auth + Realtime + RLS), OpenAI GPT-4, Pinecone, HubSpot API, Stripe, Vercel
Full-stack production SaaS built entirely with Next.js 14 App Router and TypeScript. The system scans a business website,
builds a knowledge base automatically, and answers customer queries using RAG in real time. Features: embeddable chat
widget, live dashboard with Supabase Realtime subscriptions, human agent takeover, HubSpot CRM integration, Telegram
fallback notifications, Stripe billing with multiple subscription tiers, multi-tenant PostgreSQL with Row Level Security.
Full-stack ownership — UI, API routes, database schema, auth, payments, AI pipeline, and deployment.

Kateriss AI — Video Generation SaaS kateriss.space
React, TypeScript, Vite, Supabase (PostgreSQL + Auth + Storage + RLS), Google Veo 3 Fast API, Stripe, Vercel
Text-to-video SaaS where users generate AI videos from text prompts. Full React + TypeScript frontend with custom design
system. Backend: Supabase PostgreSQL with Row Level Security, Edge Functions for generation triggers, Storage for video
files. Stripe integration with three subscription tiers (pay-per-video, Basic, Premium) and webhook-based billing. Real-time
generation status updates. Complete frontend and backend ownership from design to deployment.

iOS App — Circular Video Recording
Swift, SwiftUI, AVFoundation — native iOS, zero third-party dependencies
Native iOS application for recording Telegram-style circular video bubbles. Built with SwiftUI for UI and AVFoundation for
camera/recording logic. Clean separation of concerns: UI layer, recording controller, file export. No third-party libraries — built
entirely on Apple native frameworks. Demonstrates ability to work outside the web stack when the project requires it.

Telegram + Binance Trading Bot
Python 3, asyncio, Telegram Bot API (telethon), Binance Futures REST + WebSocket
Autonomous bot integrating Telegram and Binance APIs. Monitors a Telegram signal channel via WebSocket, parses messages
in real time, and places orders on Binance Futures within milliseconds. Implements asyncio for concurrent processing — separate
tasks for channel listening, order execution, and position monitoring. Includes error handling, position state management, and
Telegram notifications for every action. Deployed 24/7 on cloud.

AI Outreach Automation
Python, Google Maps API, LinkedIn data, OpenAI API, n8n
Full-stack automation pipeline: accepts a target persona description, searches Google Maps and LinkedIn to find matching
businesses, generates personalised AI outreach messages, and sends them at scale. Used actively for a US cold outreach
campaign. Demonstrates integration of multiple APIs, data processing in Python, and n8n for workflow orchestration — all skills
applicable to Node.js / backend integration work.

github.com/lunariavanzetti | [open contact info](look above in the "contact info" section)

Machine Learning — Foundation & Practice
Python, PyTorch, Hugging Face, scikit-learn, pandas
Studied ML systematically through Hands-On Machine Learning (Géron) and deep learning literature. Built entry-level models:
image classification, house price prediction, spam detection, sentiment analysis. Full theoretical understanding —
supervised/unsupervised learning, backpropagation, gradient descent from calculus principles, CNN/RNN/LSTM/Transformer
architectures, attention mechanisms, LLM training and fine-tuning. Calculus background from 4+ years of active university-level
teaching provides genuine mathematical intuition — not just API usage. This depth directly informs how AI features are
integrated into full-stack products.

github.com/lunariavanzetti | [open contact info](look above in the "contact info" section)