NS·

all systems operational · open to new challenges

Nikolaj Saslawski · Senior IT Systems Engineer

Systems that survive.

Senior IT Systems Engineer. Backup, monitoring and automation for infrastructure that isn't allowed to fail: hospitals, data centers, critical services. 15 years in IT. Germany · remote-friendly.

of data restored after a ransomware attack
60 TB
user accounts brought back to work
12 000
data centers under one monitoring system
3
IT and medical integrations supported
700+

Track record

2020 – 2023

Ransomware recovery

University Hospital Düsseldorf

When a cyberattack encrypted the hospital's systems, I took a key role in the recovery: 60 TB of data and Active Directory access for 12,000 staff restored, a hardened Veeam backup infrastructure designed from scratch, a temporary data-center container procured so the hospital could keep operating. Promoted to team lead: 8 engineers, full data-center rebuild.

2015 – 2020

Monitoring at scale

University Hospital Düsseldorf

Designed and rolled out enterprise-wide Zabbix monitoring for three data centers and 12,000 users. Automated server patching and restarts with PowerShell and Python. Coordinated a team of three through 700+ IT and medical system integrations.

2023 – now

Logging for critical infrastructure

Helios IT Service GmbH

Building a centralized logging and monitoring platform for KRITIS hospitals. Splunk as SIEM, migration from Icinga2 to CheckMK, automated reporting, anomaly detection together with security teams.

Before that

  • 2017 – 2018Technical Project Manager · Ayacandas GmbHBuilt the company's IT infrastructure and technical processes from zero.
  • 2011 – 2014IT Systems Engineer / Workshop Lead · K&M ComputerHardware, customer service, workshop operations and staff training.

Own products

Built, shipped and operated end-to-end: product, backend, servers, deployment.

Splav

live product

A service for a crew rafting down the Vistula. Started as trip booking, grew into the crew's operations center: personal balances, shared packing duty, a live map of the raft on the river and a Telegram bot that runs the group.

  • availability calendar
  • personal balance ledger
  • auto-priced trips
  • Telegram topics per trip
  • live river map
  • crew packing checklist
  • drinks calculator
  • admin console
splav.syshate.com

Getholda

live product

Booking and client management for therapists and coaches. Clients book their own sessions; the platform takes the admin routine out of a private practice.

  • flexible schedule and session types
  • group events with co-therapists
  • recurring bookings up to a year
  • client notes and homework
  • video call and calendar integration
  • timezone-safe reminders
  • installs like an app
getholda.com

Wishlistme

live product

Wishlists and group gifting. Add items from any store, friends chip in for expensive gifts together, reservations stay hidden from the wishlist owner.

  • wishlist in 30 seconds
  • items from any store
  • group gifting pots
  • hidden reservations
  • product data auto-fetch
  • multi-currency
wishlistme.app

The server underneath

infrastructure

Everything above, including this site, runs on infrastructure I operate myself: containerized services, automated deployments, HTTPS everywhere and monitoring, naturally. Practice what you preach.

self-hosted

Stack

Backup & Recovery

  • Veeam
  • Data Domain
  • SAN storage
  • High availability
  • Disaster recovery

Monitoring & Logging

  • Zabbix
  • CheckMK
  • PRTG
  • Splunk
  • ELK Stack
  • Grafana

Automation

  • PowerShell
  • Python
  • Bash
  • PowerCLI

Infrastructure

  • Windows Server
  • Linux
  • Virtualization
  • Networking
  • Docker

Cloud

  • Hybrid backup
  • Azure
  • AWS

Languages

  • German native
  • Russian native
  • English B2

Open source since 2015: small Zabbix tooling lives at github.com/sysHate

Let's talk.

The fastest way to reach me is LinkedIn. I answer there.

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