all systems operational · uptime since 2011
Nikolaj Saslawski · Senior IT Systems Engineer
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. Warsaw · remote-friendly.
2026 – now
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. Tooling follows the client, from classic monitoring stacks to modern observability platforms, with AI-assisted engineering where it earns its place.
2023 – 2026
IT operator of a hospital group
Built a centralized logging and monitoring platform for hospitals classed as critical infrastructure (KRITIS), rolled out across sites nationwide. Splunk as SIEM, migration from Icinga2 to CheckMK, automated reporting with Python and PowerShell, anomaly detection together with security teams, day-to-day work side by side with the Linux/DevOps crew.
2020 – 2023
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. The quieter part of the job: SAN storage from three different vendors, all file and VM backups, hardware procurement, installation and repair across two data centers.
2015 – 2020
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, owning vendor selection, procurement and documentation, and streamlining approval and rollout processes along the way.
Built, shipped and operated end-to-end: product, backend, servers, deployment and the partner deals behind them. AI works inside the products: from receipt and product recognition to search across partner catalogs.
My main product. Wishlists and group gifting: add items from any store, friends chip in for expensive gifts together, reservations stay hidden from the wishlist owner. AI recognizes a product from a photo and finds it across partner stores, backed by real agreements with affiliate platforms and with shops directly.
Next.js · TypeScript · PostgreSQL · Redis · background workers · CI/CD · affiliate APIs
wishlistme.appBooking and client management for therapists and coaches. Clients book their own sessions; the platform takes the admin routine out of a private practice, from scheduling to notes and homework. API-first from day one.
Node.js · PWA · SQLite · Telegram Bot API · Google Calendar & Meet API · Docker
getholda.comA private network for kids and families: you can only talk to people you have met in real life. New contacts pair via QR code plus Bluetooth proximity, messages are end-to-end encrypted, parents manage safety without reading a single chat.
iOS & Android · E2E encryption · closed social graph
concept MVPA raft on the Vistula is a hobby shared by a big group of friends, and this service pulls everything we need for it into one place. Seat and tent bookings, who drives whom to the raft, expense splitting with AI receipt recognition, a recipe book that calculates the shopping list for the crew of a specific trip, and voting on future raft upgrades. A particular pride: the on-board dashboard that merges every device, from solar panel and batteries to motors and fridges, so we always know where power stands and how long we can run the engines.
Node.js · SSR · SQLite · Telegram Bot API · Leaflet + OpenStreetMap · Docker
splav.syshate.comA web tool that forges Grok patterns for log pipelines: paste a raw log line, get an ECS-compliant JSON, a Grok pattern and a ready Logstash filter. LLM-powered suggestions, local or via API: monitoring craft meets AI.
JavaScript · Grok / ECS · Logstash · LLM: local & API
side toolA cashback product in active development with a partner: branch discipline, pull requests and mutual reviews. AI is on the payroll here too: in the product and in the process.
in the worksEvery product above runs on its own small server fleet: standalone Docker hosts for the simple services and a Docker Swarm cluster where failover and zero-downtime updates matter. Deployment is automated from commit to production, and the fleet is watched by the same kind of monitoring I build in the enterprise. Plus the plumbing no real product ships without: transactional email, media storage, partner API integrations. Practice what you preach.
self-hostedOpen to product collaborations and turnkey builds, and always happy to hear about interesting roles in and around Warsaw. The fastest way to reach me is LinkedIn.
German by passport, Belarusian by roots: Belarusian work ethic, German precision.
Open LinkedIn