---
title: Nikita Dontsov — sleonia.tech
canonical: https://sleonia.tech/
updated: 2026-07-11
license: All rights reserved
---

# Nikita Dontsov

// Software engineer
// Dev events organizer
// Yet another AI enthusiast

## About

Hi, I'm Nikita, a software developer with a front-end focus and a curiosity for modern tech and personal efficiency.

I've worked in big tech, creating tools for data analytics and contributing to a design system used across a dozen teams. Now I'm building the best ridehailing platform in the world — two apps that run car, scooter, and charging-station fleets with a tangle of automation under the hood.

Outside work, I organize tech events and share what I learn — from small IT breakfasts to meetups with hundreds of guests. I've also taught at Yandex Summer Schools and spoken at public talks.

## Work

- [Fleetroom • Yandex](https://fleet.yandex.com) — ride-hailing platform for fleets
- [Garage • Yandex](https://garage.yandex.ru/) — car rentals from fleets directly to drivers

## Side Projects

- [Klaxon](https://github.com/sleonia/klaxon) — unmissable full-screen meeting alerts for macOS. A menu-bar app that throws a can't-miss alert onto every screen before a call starts; one keypress joins.
- [Hearthstone Sounds for AI Agents](https://github.com/sleonia/ai-harness-hs-sounds) — a notification soundpack that plays memorable sounds from Hearthstone's golden era whenever an AI agent (Claude Code and friends) needs my attention. A Claude Code plugin; macOS only.
- claw — my personal parser/summarizer: a Telegram bot that ingests RSS, GitHub, and Telegram sources into a shared database and turns them into daily and weekly digests.

## Talks & Articles

- [Public frontend coding interview](https://www.youtube.com/watch?v=_ClyL91TaBQ) — a training webinar role-playing a real frontend interview, solving JavaScript tasks live (async, algorithms, core JS).
- [Exploring React Query](https://m.vk.com/video-17796776_456240926) — how React Query manages server data in React apps: caching, background updates, UI sync (April 2024 talk).
- [Dive into the Magic of React-Query](https://dev.go.yandex/blog/react-query-magic-2024-04-26) — text version explaining how React Query works under the hood.

## Connect

- Email: <nikita.dontsov.developer@gmail.com>
- GitHub: https://github.com/sleonia
- LinkedIn: https://www.linkedin.com/in/nikita-dontsov/
- vas3k: https://vas3k.club/user/sleonia/