Marek Reinhold
Senior Java backend engineer and tech lead. I write about running software in production — what I build, what breaks, and how I fix it.
Latest
Section titled “Latest”Going deeper on how software runs in productionWhy I spend 10 hours a week on AWS, infrastructure as code and Kubernetes — and why every step ends with evidence.
No human uses AWS rootThree AWS accounts, SSO with MFA as the only way in, region guard rails and budgets — and the CLI that printed nothing.
Runbooks
Section titled “Runbooks”Step-by-step guides I’ve run end to end, with the real results and failures. Fill in your own values and follow along.
Start hereWho the runbooks are for, what they cost, how far to trust them.
A0 — AWS organization, SSO, budgetsThree accounts nobody logs into as root.
About me
Section titled “About me”8+ years of Java backend in fintech and public-sector integrations; ten years at sea before that. More about me · marek@reinhold.co