Two kinds of evidence. Things I wrote and still maintain, and systems I scoped and commissioned.
Repairs the client side after an on-premises Exchange to Microsoft 365 cutover. Password loops, stale Autodiscover redirects, dead MAPI profiles.
Runs as a standard user with no admin rights. Every change previews first, backs up the registry, and reads the value back to confirm it took.
A Berlin neighbourhood help marketplace. Neighbours post what they need, neighbours nearby offer to do it, both sides agree the price.
Duplicates a site locally with its assets and link structure intact, for archiving and offline reference.
Systems I scoped, procured and commissioned. The scale is the part that is hard to fake.
Ninety cameras across thirteen construction sites, monitored live from one room by one operator.
Every site connects over 4G behind carrier-grade NAT, so no inbound port forwarding is possible. Built on outbound P2P instead, with live sub-streams tuned for the worst case mobile link and a video wall laid out by risk rather than by site.
Read the case studyRecovery and stabilisation of an Ammann AS2000 asphalt plant control system running on SunOS 5.8.
Rebuilt a corrupted System V startup chain from init through rc2.d to S99uag, restored the application environment, and resolved shared memory, permission and watchdog faults behind a respawn loop. No vendor support, no rollback, and every restart a production decision.
Read the case studyComplete IT infrastructure for a highway construction site, built from nothing with no internet and no cloud.
Multi-VLAN network with router-on-a-stick routing, a Grandstream IP PBX registered across VLANs without Zero Config, a 24 TB NAS with role-based access for twenty-four users, and ONVIF surveillance. Designed to work with the outside link down, then connected.
Read the case studyMigration work, an estate that has outgrown its last design, or a question about the toolkit. All of it is welcome.