Daniel Grubnyk

EZtime — IT Administrator & Support Engineer

Dec 2025 – present · attendance and shift-scheduling software for businesses

• L2/L3 support for Customer Success: triage escalations, reproduce bugs, and separate real defects from knowledge gaps. Fewer than 1 in 20 tickets I close is reopened.
• Cut the share of support requests reaching a developer from 79% to 43% while request volume grew 60%; about 3 in 4 escalations that reach me are solved without one.
• Filed 66 bug reports in two months, 59 already fixed; QA-verified 45 fixes before release and sent 12 back.
• Built AI-assisted support tooling: ticket pre-triage, a review of 6,000+ tickets to find where bugs come from, and 170+ rewritten help-center articles.
• IT administration and internal security; develop and maintain the internal CRM support works in (60+ cloud functions, 280+ commits).

callcenter — internal CRM (EZtime)

The system support, sales and finance work in every day. Calls, tickets, customers and support email sit on one timeline, so anyone can see a customer's full history before they pick up the phone. Phone-system integration with call logs, recordings and transcripts; support email turns into tickets automatically; signed quotes start customer onboarding without manual steps.

React · TypeScript · Firebase · Node.js · main developer and maintainer · private repo

portfolio — this site, built and run by me

I built this site and run its server myself: setup, deployment and security. Every visitor gets a real shell in their own isolated, locked-down sandbox, thrown away when they leave. I administer the server: patching, hardening, audits and monitoring.

Linux · Nginx · Bash · xterm.js · WebSocket · systemd

mywer — royalty-free music discovery

Turns any Spotify playlist into a royalty-free equivalent: matches each track to the closest copyright-free alternative and bulk-downloads them. Four FastAPI microservices, React frontend, secrets in HashiCorp Vault.

React · FastAPI · Spotify API · Jamendo API · Vault · AWS KMS · Docker

randbot — TikTok-style Telegram discovery

A Telegram bot for discovering random media from indexed channels, with one-tap subscribe and paid subscriber-quota bundles. 42 production deploys in 2 months via GitHub Actions to AWS.

Python · aiogram 3 · Telethon · SQLite · Redis · Docker · AWS

securesite — security-hardened Django auth

A Django app focused on production-grade security around authentication, sessions and credential storage.

Django · pyOpenSSL · Werkzeug · whitenoise