Archive - The Cloud Engineers

SQL or NoSQL on AWS? A Practical Decision Framework for Cloud Engineers

Choosing the right database is one of the most impactful architectural decisions you’ll make on AWS.

Feb 18 • Lefteris Karageorgiou

AWS Networking 101: Everything You Need to Know About VPCs

If you’re starting your AWS journey, you’ve probably heard about VPC (Virtual Private Cloud) and wondered what all the fuss is about.

Feb 11 • Lefteris Karageorgiou

Building a Containerized Application with ECS and Fargate

Running containers in production can feel overwhelming when you first approach AWS.

Feb 4 • Lefteris Karageorgiou

January 2026

Serverless patterns for managing AWS Lambda at scale (from my re:Invent 2025 talk)

As serverless applications scale, managing hundreds of AWS Lambda functions becomes increasingly complex.

Jan 28 • Lefteris Karageorgiou

Serverless Contact Form with API Gateway, Lambda, and SES: A Complete Guide

Static sites have become incredibly popular for portfolios, landing pages, and business websites.

Jan 21 • Lefteris Karageorgiou

10 Things I Wish I Knew Before Starting My Cloud Journey

Eleven years ago, I was staring at the AWS console for the first time, completely overwhelmed.

Jan 14 • Lefteris Karageorgiou

5 Essential Traits Every Cloud Engineer Should Master in 2026

At AWS re:Invent 2025, Amazon CTO Werner Vogels delivered a powerful keynote about the “Renaissance Developer” in the AI era.

Jan 7 • Lefteris Karageorgiou

December 2025

The Cloud Engineers in 2025 - Year in Review

My passion for helping professionals level up their cloud skills drove me to start this newsletter in early 2025.

Dec 31, 2025 • Lefteris Karageorgiou

5 Lambda Cost Mistakes I See Teams Make (And How to Fix Them)

Lambda’s pay-per-use model sounds simple: you pay for what you use.

Dec 24, 2025 • Lefteris Karageorgiou

How Much Do Cloud Engineers Really Make? A Breakdown by Role and Experience

Cloud computing has revolutionized how businesses operate, and with it, the demand for skilled cloud professionals has skyrocketed.

Dec 17, 2025 • Lefteris Karageorgiou

Building a Data Lake with S3: Architecture and Design Principles

Amazon S3 has become the de facto foundation for data lakes on AWS, and for good reason.

Dec 10, 2025 • Lefteris Karageorgiou

How to Nail Your Cloud Engineering Interview with the STAR Method

If you’re preparing for a Cloud Engineering interview, you’ve likely heard about the STAR method.

Dec 3, 2025 • Lefteris Karageorgiou

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