Fifteen years in hospitality. Front office, night audit, and six years as General Manager of a boutique hotel in Athens, running operations and a team of nine. Later, overnight operations at a 300-room five-star resort in Cyprus, where between midnight and dawn the building is your problem and nobody is coming to help.
In 2023 I left hospitality and learned AWS full-time. Eight to ten hours a day: cloud application development at the University of Athens, then certification after certification. By 2026 I held eleven, including Solutions Architect Professional and the Machine Learning, Security and Advanced Networking Specialties.
Somewhere in there the job changed from studying to shipping. I'm now the sole architect and builder on production GenAI systems for clients in Greece: design, Terraform, Bedrock agents, model selection, evaluation, deployment, and everything that happens afterwards.
What actually transferred
The certifications took the study. They're not the part of my background that makes the difference.
Sole delivery for a client is not fundamentally an engineering problem. It's scoping a vague request into something deliverable. Telling a managing director something they'd rather not hear. Staying calm when a production system misbehaves on a Friday afternoon. I had been doing that for fifteen years before I wrote a line of Terraform.
A hotel teaches you that the guest must never be the person who discovers the problem.
That single idea shapes how I build. It's why I run roughly a hundred and thirty CloudWatch alarms across three production systems, considerably more than strictly necessary, so that a fault surfaces to me before it surfaces to a client. It's why every system I ship lets the client manage their own documents rather than depending on me. And it's why every answer any of my systems produces links back to the source it came from.
None of that is on a certification syllabus. All of it is the reason clients keep using what I build.