The Cloud Engineers

AWS Budgets for Beginners: How to Monitor Your Cloud Spending and Avoid Overages

One of the most common concerns when working with AWS is unexpectedly high bills.

Nov 12 • 

Lefteris Karageorgiou

4

1

Idempotency Patterns for Serverless Applications

If you’re building serverless applications on AWS, there’s a harsh reality you need to accept: duplicate events will happen. It’s not a matter of if…

Nov 5 • 

Lefteris Karageorgiou

1

October 2025

Back to Vegas: My Second AWS re:Invent Adventure

With one month left until Las Vegas, I can’t help but feel the familiar excitement building up.

Oct 29 • 

Lefteris Karageorgiou

Secure File Uploads to Amazon S3 Using Presigned URLs

When building modern web applications, one common challenge is allowing users to upload or download files directly to and from Amazon S3 while…

Oct 22 • 

Lefteris Karageorgiou

4

Building Your First Event-driven Application on AWS

Event-driven architecture (EDA) has become the backbone of modern cloud applications, and for good reason.

Oct 15 • 

Lefteris Karageorgiou

3

1

1

Building a 3-Tier Architecture with Serverless on AWS

Introduction

Oct 8 • 

Lefteris Karageorgiou

2

1

Kinesis vs SQS vs EventBridge: Choosing the Right Data Stream

When building modern cloud applications on AWS, choosing the right messaging and streaming service can make or break your architecture.

Oct 1 • 

Lefteris Karageorgiou

2

September 2025

Mastering Distributed Transactions with AWS Step Functions and the SAGA Pattern

The SAGA pattern has become a cornerstone of distributed systems architecture, especially in serverless environments where microservices need to…

Sep 24 • 

Lefteris Karageorgiou

1

RTO vs RPO: Designing Practical DR Strategies on AWS

Disaster Recovery planning often gets relegated to a "nice-to-have" category until it's too late.

Sep 17 • 

Lefteris Karageorgiou

4

1

5 Proven Strategies to Reduce Cold Starts in AWS Lambda

In the world of serverless computing, AWS Lambda is a game-changer, allowing developers to run code without managing servers.

Sep 10 • 

Lefteris Karageorgiou

5

3

2

5 AWS Projects To Get You Hired | FREE PDF Guide

Get your FREE PDF Guide now: https://learn.thecloudengineers.com/5-aws-projects-to-get-you-hired

Sep 3 • 

Lefteris Karageorgiou

13

6

August 2025

Moving from On-Premises to AWS: Skills Translation Guide

Many IT professionals with years of on-premises experience feel overwhelmed when transitioning to AWS.

Aug 27 • 

Lefteris Karageorgiou

1