RootFox

Stack

I build product systems end to end when they help real people. B2C and B2B both fine if the product is useful. Hands-on lead when needed: hiring, mentoring, roadmap vs capacity. I ship with tests, cut scope creep, and use AI tools without replacing judgment.

Core

TypeScript · JavaScript · Node.js · React · Svelte · SvelteKit

Frontend

Next.js · Nuxt · Zustand · Redux · Vite · Storybook · BEM · WebSockets

Backend

GraphQL · REST · OpenAPI · BullMQ · RabbitMQ · Stripe · JWT · OAuth · NestJS · Express / Koa

Data

MongoDB · PostgreSQL · Redis

Infra & delivery

Docker · GCP · AWS · Kubernetes · GitHub Actions · GitLab CI

Testing

Vitest · React Testing Library · Playwright · Cypress · BrowserStack

AI-native

Cursor · Claude Code · Claude · Pi · OpenRouter · GoModel · MCP · Superpowers · Design Gate / TDD

Game & APIs

Steam API · game backends · hobby games

Grow

Golang · Flutter · Kafka · offline-first · Rust · Pixi.js

About me

Alex Vopilovskiy

Entrepreneur

FullStack Engineer • Photographer • Mentor • Kart Racer • ex-Drummer

TypeScript · JavaScript · Node.js · React · Svelte · SvelteKit

My Principles

AI Fluency This is the way

Companies I worked for

Organization

Legal name: Aleksandr Vopilovskii pr RootFox
Country: Serbia
Registered address: Jurija Gagarina 231, local 329
11197 Beograd (Novi Beograd), Serbia
Registration no.: 68471168
Registration Date: 10 March 2026
Registering authority: Serbian Business Registers Agency
Tax ID (PIB): 115575108
D-U-N-S: 369907635
Email: sef@rootfox.cc
Bank: Alta Bank

Legal name: Individual Entrepreneur Aleksandr Vopilovskii
Country: Georgia
Registered address: Tbilisi, Krtsanisi district, Fonichala settlement 3, building 5
Registration no.: 304647568
Registration Date: 25 August 2022
Registering authority: LEPL National Agency of Public Registry
Email: georgia@rootfox.cc
Bank: Bank of Georgia

Apps

Nonogram

Free

Logic picross puzzles

Mines

Free

Classic minesweeper puzzle

Helicopter

Free

One-touch arcade flyer

Sudoku

Free

Classic number puzzle

MadNews

Free

Absurd headline generator

Rock-Paper-Scissors

Free

Online multiplayer rock-paper-scissors

Crack the Code

Free

Logic code puzzle

Projects

Foxling

Personal assistant in Telegram: reminders, memory, and calendar in your own words. Website

Open

Ping-Pong

Service that helps friends see who made the last move: invited for a walk, wrote first. A simple way to maintain balance in relationships.

Visit

InstaFox

My personal photography portfolio with Instagram-like gallery.

Visit

FoxFamily

Interactive family tree visualization.

Visit

Notepad

Personal notes app with a vintage macOS feel. Go, MongoDB, and Svelte.

Visit

Chat

Global realtime chat. No signup, no database - just open and talk.

Visit

VChat

Mesh video chat. No signup - just open a room and talk.

Visit

Planning Poker

Scrum planning poker: reveal every vote on a board, plus the numeric average.

Visit

Copter

Remake of the classic Flash game.

Play

Fox Story

Work in progress. Walk as a fox through a quiet forest - with a live day-night sky cycle.

Play

Nonogram

Japanese crossword puzzle game.

Play

Mines

Classic minesweeper game.

Play

Sudoku

Classic number puzzle game.

Play

Mahjong

Match open tiles through the buffer. Clear the board to win.

Play

Rock-Paper-Scissors

Online multiplayer rock-paper-scissors game.

Play

Chess

Play against Stockfish. Four difficulty levels.

Play

Crack the code

Mastermind-style code breaking game.

Play

Piano Hero

Guitar Hero style piano game.

Play

AllCart team welcome

Old welcome page for new AllCart team members.

View

911 Carrera · G-Series

Porsche 911 Carrera 3.2 Coupé M491 G50

View

Spitfire

Supermarine Spitfire · Merlin & Griffon · RAF

View

Traphole Music Player

Custom music player for my old band's tracks.

Listen

AI Workflow

Setup guide: rules, skills, prompts, daily workflow.

View

Handbook

How I actually work — simplest system, verified, cheap to be wrong.

View

F1 Team Names

Every official team name on the 2026 grid - with era photos.

View

Coub

Collection of my favorite coubs.

Visit

Pentafoxianism

A satirical religion website with commandments and pantheon.

Explore

Steam Inventory Info

Tool to analyze Steam inventory items and their values.

Open

Band "coming soon"

Nostalgic "coming soon" page for my old music band.

View

Bad Advice Oracle

Ask a question. Helpful answers not included.

Consult

MadNews

Random crazy news headline generator.

Visit

MadNews Bot

Mad news generator in Telegram - plus horoscopes, rates, and bad advice. Source

Open

8th March

Interactive greeting card for International Women's Day.

View

Johnny Castaway Screensaver

Funny old screensaver about Johnny.

Explore

Scholastic Pie Chart

Interactive pie chart with unexpected twist.

View

Look Generator

Random outfit combination generator.

Generate

Certificate

Generate funny certificates for your friends.

Create

Fast Casino

The fastest casino game you'll ever play.

Play

Black Hole

404 page

Open

Matrix

The Matrix screensaver

Open

Nice Question

Self-assessment checklists for different categories.

Visit

Night Toggle

Pure HTML+CSS day/night toggle animation.

View

Cube

3D CSS cube experiment.

View

Cube 2

Advanced 3D CSS cube with more effects.

View

Password Generator

Fast, secure, crypto-grade random passwords in the browser.

Visit

Image Convert

Drop an image in the browser. Get lossless WebP, max-quality JPEG, and PNG when alpha is present.

Visit

IP Whois

Look up geolocation and network details for any IP address.

Visit

DIG Whois

DNS records and WHOIS data for any domain.

Visit

Darkroom

RAW photo editor in the browser. Sony ARW and Canon CR2/CR3, no upload — decoding, tone and color run locally.

Visit

Tail MCP

MCP server plus a browser extension that lets AI assistants drive your own logged-in browser. Local-only — no cloud backend.

GitHub