2024 — 2025
ROBOL — Backend Developer
Employees Statistics Service (Nest.js / Prisma): collects and processes shifts, orders, revenue, profit, average check and profit %.
Location Statistics Service (Nest.js / Prisma): aggregates per-location orders, revenue, profit, shifts, average check and profit %.
Menu Items Statistics Service (Nest.js / Prisma): computes sold units, revenue, gross profit, profit %; supports no-sales filter.
Sales Statistics Service (Nest.js / Prisma / ChartJS): generates overall KPIs, hourly/weekly/dynamic charts, breakdowns by payment/order method, status, items and employees.
PRRO Services (Nest.js): developed online/offline fiscalization (DOCTYPE 101/102/103) and signing XML docs.
Clustered WebSocket (Node.js / Redis Pub/Sub): synchronized messages across cluster workers.
Serverless Health Check (AWS Lambda): moved PRRO server checks to serverless.
Docker / SSH: configured private library import with SSH agent.Typed Axios Client (Nest.js / TypeScript): built fully typed PRRO API client.
i18n (nestjs-cls): per-request context injection.
Legacy Code: refactoring, bug fixing and optimization for high-load (>100k records).

• Backend Development (Node.js / NestJS / PHP): Developed and maintained the backend of the platform.
• CMS Integration (Strapi): Managed video content through Strapi.
• Automation & Integration (Pipedream / Pipedrive): Automated workflows and integrated with CRM for client management.
• Database Management (PostgreSQL / MongoDB): Worked with relational and NoSQL databases.
• API & Payment Systems: Developed APIs and integrated payment systems.
• Platform Optimization: Refactored and optimized platform performance.
• PHP Server Support: Maintained the existing PHP server.
• Telegram Bot Development: Designed and developed a Telegram bot for user interaction and automation.