Kaliningrad, RussiaBuilding software since 2010

Nick Kosarev

Fullstack Developer / Tech Lead

I build web products across interfaces, backend services and infrastructure. Foodtech and fintech experience; hands-on responsibility from data models to release.

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Experience

27 Apr 2026 - 27 Oct 2026

EXPI · ИП Петров И.И.

Tech Lead / Fullstack Developer / DevOps

Full experience and responsibilities

Sole engineer for a fintech platform: architecture, implementation, infrastructure and releases.

Migrated PHP data and services in stages using ETL, parallel reads and reconciliation. Decoupled copy-trading workers from PHP; portal migration remained in progress.
Moved Matrix to a cloud worker with idempotent commands, broker reconciliation, leases and pausing on uncertain state. Prepared a paid subscription and public offer for launch; Matrix remained in production testing.

Case studies

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Project closed in 2026

Real-time interactive game

Multiplayer Twitch chat game built on Canvas API and WebSocket. Viewers interact via chat commands, OAuth auth, inventory and trophy system.

Technical context

WebSocket, Canvas API, TypeScript, Twitch API

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Projects

Past independent products and public source. Closed projects are labelled; the engineering work remains available.

NextOrders

An open-source food-ordering platform with SSR, multiple languages, a persistent cart and guest checkout.

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Meloteka

Project closed in 2026

Built a music catalog with a web app, Telegram Mini App, Subsonic API compatibility and audio transcoding.

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Startodel

Project closed in 2026

Built a food-delivery website platform with menus, online orders, payments, notifications and multiple languages.

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ChatGame

Project closed in 2026

Built an interactive Twitch game with chat commands, real-time synchronization and a Telegram Mini App.

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