RootFox
Stack
Product Engineering
TypeScript · JavaScript · Node.js · React · Svelte · SvelteKit · Go
Frontend
Next.js · Nuxt · Zustand · Redux · Vite · Storybook · WebSockets
Backend & APIs
REST · OpenAPI · GraphQL · NestJS · Express / Koa · BullMQ · RabbitMQ · Stripe · OAuth · JWT
Data & Infrastructure
PostgreSQL · MongoDB · Redis · Docker · GCP · AWS · Kubernetes
Infra & delivery
Docker · GCP · AWS · Kubernetes · GitHub Actions · GitLab CI
Testing & Delivery
Vitest · React Testing Library · Playwright · Cypress · BrowserStack · GitHub Actions · GitLab CI
AI-native
Cursor · Claude Code · Claude · Pi · OpenRouter · GoModel · MCP · Superpowers · Design Gate / TDD
AI & Automation
MCP · RAG · Browser Automation · Claude Code · Cursor · Claude · Pi · OpenRouter · GoModel
Observability & Performance
Sentry · Grafana · Prometheus · k6 · Lighthouse
Other Things I Build
Steam API · Bots · Hobby Games · Pixi.js · Flutter · Offline-first
About me
I build products end to end, from the first idea and architecture to production and everything in between. I like owning the whole system: backend, frontend, infrastructure, integrations, and the edge cases that make software actually work.
I prefer simple systems, small changes, explicit boundaries, and short feedback loops. I verify assumptions against reality, keep failures reversible, and treat scope control as an engineering skill. There is rarely a single best practice, only trade-offs that should be understood and made explicit.
I'm a hands-on engineer who can lead when needed: hiring, mentoring, technical direction, and balancing roadmap against capacity. I also build things for myself, from MCP tools and browser automation to personal assistants and games. I use AI heavily in development, but keep engineering judgment, testing, and responsibility on my side.
My Principles
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
- 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
- georgia@rootfox.cc
- Bank
- Bank of Georgia
Apps
Projects
Foxling
Personal assistant in Telegram: reminders, memory, and calendar in your own words. Website
OpenTail MCP
MCP server plus a browser extension that lets AI assistants drive your own logged-in browser. Local-only — no cloud backend.
GitHub
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
Fox Story
Work in progress. Walk as a fox through a quiet forest - with a live day-night sky cycle.
Play