Mail with an attachment took eight minutes to send
A mail send that timed out on attachments, traced to the local scanning chain rather than the relay everyone suspected.
Technology: Redis
A migration where every scheduled job silently stopped
A dedicated server move where the site looked perfect and every scheduled job had been failing since cutover.
Fifteen years running one retailer’s entire web stack
Storefront, hosting and mail for a retailer, run as a single system across two self-hosted ISPConfig servers.
Cloudflare 524s that were never Cloudflare’s fault
Intermittent gateway timeouts traced to three unrelated causes, none of them the CDN.
A store that has been online since 1999
A quarter-century-old domain, still trading, migrated through several platform generations.
Performance forensics
Profiling that ends with a named cause rather than a list of generic recommendations.
WooCommerce engineering
Storefront work where the cost of an hour of downtime is measurable.
Server administration and hosting
Ongoing Linux and ISPConfig administration for WordPress hosting, including the mail stack.