Backend Developer · Node.js / TypeScript / PHP

I’m a backend developer with hands-on experience in designing, building, and maintaining backend systems, RESTful APIs, and third-party integrations.

• 🛠 Specialize in backend development using Node.js and TypeScript, building APIs with Express.js and Strapi, and working with PHP-based systems.
• 💳 Hands-on with payment gateway integrations — Stripe, Primer.io, OPPWA, CatalystPay, eMerchantPay
• 🗄 Experienced with PostgreSQL, MySQL, and MongoDB; designed and optimized data models and queries. Worked with TypeORM for data access layer. Implemented background processing using Redis and BullMQ queues.
• 🚀 Building production-grade open-source pet projects on NestJS + TypeScript in my spare time
• 🌱 Currently exploring NestJS, Docker, Kubernetes, microservices architecture, Laravel and OOP patterns

A production-ready Telegram bot built for the XP Metal Detectors community to deliver real-time firmware update notifications.

Stack: NestJS 11 · TypeScript · grammY · PostgreSQL + TypeORM · Redis + BullMQ · Docker · Pino · Jest

• Modular NestJS architecture (bot · database · xp-api · queue · scheduler · common)
• Async notification pipeline on BullMQ + Redis with dedicated processors
• Cron-scheduled firmware checks via @nestjs/schedule integrated with the official XP API
• Multilingual support for 8 languages (@grammyjs/i18n + Fluent)
• RBAC via NestJS guards · admin broadcasts · API account management
• Security: API token rotation, encrypted credentials, graceful error handling

A multi-phase web scraper that collects structured data on AI tools from theresanaiforthat.com.

Stack: Node.js · Puppeteer · Puppeteer Extra (Stealth Plugin) · Winston · Dotenv

• Three-phase pipeline: link collection → tool detail extraction → category tree
• Anti-detection: User-Agent rotation, randomized delays, viewport randomization, stealth plugin
• Recursive category-tree traversal with both flat-list and hierarchical JSON output
• Centralized Winston logging with environment-driven configuration
• Detailed JSON schema (features, pricing, modalities, releases, FAQ, pros/cons)

A real-time scraper that collects football match data and delivers automated predictions to a Telegram channel.

Stack: Node.js · Puppeteer · MySQL · Telegraf.js

• Real-time data collection from soccerstand.com / flashscore.ua
• Automated football match prediction pipeline with Telegram delivery
• MySQL schema for historical match data and prediction results