The AI Cloud Engineers

The AI Cloud Engineers

My Insights After 10 Years of Serverless

Common mistakes, emerging tools, and architecture patterns from a decade in the trenches

Lefteris Karageorgiou's avatar
Lefteris Karageorgiou
Jul 01, 2026
∙ Paid

Hey, it’s Lefteris 👋 I’m the voice behind the weekly newsletter “The Cloud Engineers.”

Ten years ago, I discovered Serverless and AWS Lambda, and it changed the way I build software forever.

What started as curiosity quickly turned into conviction. Over the past decade, I’ve designed and shipped production systems entirely on Serverless. I even built a startup from scratch, on a fully Serverless stack and took it to production in just 10 months.

In my four years at AWS, I’ve worked alongside hundreds of customers on their Serverless journeys, from first Lambda functions to complex event-driven architectures. Along the way, I distilled everything I’ve learned into my book, Mastering Event-Driven Microservices in AWS.

Last month, Lee Gilmore, an AWS Hero, reached out and featured me in his Serverless Advocate newsletter, where he posed three thought-provoking questions about the state of Serverless. I’m sharing my answers here, because they touch on things I think every Serverless engineer…

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