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 · 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

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

Advantika 8Heads Quantron Systems NantMobile NRGSoft Cirrus Assessment Vneto Systems Sunplug Esports Score SkinSwipe 322.gg AllCart Kosmos Games VoiceScript Advantika8HeadsQuantron SystemsNantMobileNRGSoftCirrus AssessmentVneto SystemsSunplugEsports ScoreSkinSwipe322.ggAllCartKosmos Games >VoiceScript

Organization

Legal name
Aleksandr Vopilovskii pr RootFox
Country
Serbia
Registered address
Jurija Gagarina 231, local 329
11197 Beograd (Novi Beograd), Serbia
Registration no.
68471168
Tax ID (PIB)
115575108
D-U-N-S
369907635
Email
[email protected]

Apps

Nonogram

$0.49

Logic picross puzzles

Mines

$0.49

Classic minesweeper puzzle

Helicopter

$0.49

One-touch arcade flyer

Sudoku

$0.49

Classic number puzzle

MadNews

Free

Absurd headline generator

Rock-Paper-Scissors

$0.49

Online multiplayer rock-paper-scissors

Crack the Code

Free

Logic code puzzle

Projects

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

Copter

Remake of the classic Flash game.

Play

Nonogram

Japanese crossword puzzle game.

Play

Mines

Classic minesweeper game.

Play

Sudoku

Classic number puzzle game.

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

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

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

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

History

Collection of historical timelines.

View

IT History

Timeline of information technology milestones.

View

Blues History

Journey through the history of blues music.

View

Private