2026 – now
Observability in consulting
Global IT consultancy
A new chapter since July 2026: bringing hospital-grade monitoring practice to enterprise clients across industries. Metrics, logging, alerting and the automation that keeps them honest.
all systems operational · uptime since 2011
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
2023 – 2026
Logging for critical infrastructure
IT operator of a hospital group
Built a centralized logging and monitoring platform for hospitals classed as critical infrastructure (KRITIS). Splunk as SIEM, migration from Icinga2 to CheckMK, automated reporting, anomaly detection together with security teams.
2020 – 2023
Ransomware recovery
Large university hospital
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
Large university hospital
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.
Before that
- 2017 – 2018Technical Project Manager · tech startupBuilt the company's IT infrastructure and technical processes from zero.
- 2011 – 2014IT Systems Engineer / Workshop Lead · PC retail & service chainHardware, customer service, workshop operations and staff training.
Own products
Built, shipped and operated end-to-end: product, backend, servers, deployment.
Splav
live productA 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
Getholda
live productBooking 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
Wishlistme
live productWishlists 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
The server underneath
infrastructureEverything above, including this site, runs on infrastructure I operate myself: containerized services, automated deployments, HTTPS everywhere and monitoring, naturally. Practice what you preach.
self-hostedStack
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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