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Oleksandr Andrushchenko

Oleksandr Andrushchenko

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5d ago

How to Pass the AWS Solutions Architect Associate (SAA-C03): A Practical Guide With 5 Real-World…

Stop memorizing AWS services. Start thinking like a solutions architect.

AWS Solutions Architect Associate (SAA-C03)

Oleksandr Andrushchenko

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Nov 6

Mastering AI Art & Illustration: A Practical Guide to Prompts, Styles, and Creative Control

Turn an idea into a clear visual brief, use reference images deliberately, and improve your illustrations through focused revisions.

A realistically shaded portrait with black and cobalt brush marks against a saturated yellow background.

Oleksandr Andrushchenko

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Nov 4

DynamoDB Data Modeling: Blog Platform Example

This case study describes a production blog platform backed by Amazon DynamoDB. It covers familiar workloads such as latest posts, popular…

DynamoDB Data Modeling: Blog Platform Example

Oleksandr Andrushchenko

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Sep 7

ClickHouse vs PostgreSQL: What Happens at Billion-Row Scale?

PostgreSQL is one of the best general-purpose relational databases available. But what happens when a workload becomes heavily analytical…

ClickHouse vs PostgreSQL

Oleksandr Andrushchenko

Oleksandr Andrushchenko

Software Engineer specializing in building and optimizing scalable applications. More about me: https://oleksandr-andrushchenko.com

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