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What are Observables? A 3-step guide to understanding them

Mathuti Sivamanogaran6 min read

An alien and a human coding an app

Observables are one of the things I struggled most with when I first started coding in Angular. With the library RxJS, they are used for managing asynchronous operations, handling events, managing states, and creating dynamic user interfaces. This article will…

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Mastering File Upload Security: DoS Attacks and Antivirus

Marek Elmayan12 min read

Laptop with a malicious file uploading on a server represented by a cloud with a lock

TL;DR:Mitigate Denial of Service (DoS) threats by imposing restrictions on both the size of files and the quantity of uploads permitted on your server. Implement antivirus scanning for files that users download, ensuring protection against malware infections.File Upload vulnerabilities and security…

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The Unfortunate Demise of App Center - An Obituary

Mo Khazali8 min read

An App Center logo on a gravestone.

Today is a sad day for the React Native ecosystem. Microsoft very quietly announced that App Center is being "retired" in just over a year's time (at the end of March 2025). Over the years of building React Native apps,

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Three Hacks to Level Up Your Maestro Testing

Claire Squires13 min read

Two Christmas elves in a chemistry lab doing experiments

Introduction Our team at Theodo UK recently had the delightful challenge of building a universal app - an app that runs on multiple operating systems from a single codebase. This project presented many interesting technical problems, including the task of automating…

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Dimensionality reduction for exploration and curation of datasets

Stepan Lebedev13 min read

One million integers embedded into 2D space with UMAP

The availability of AI models for everyday users skyrocketed last year, leading to a surge in Artificial Intelligence's popularity. However, despite this advancement, companies still grapple with the challenge of collecting accurate data for AI implementation. Today, the significance of well-curated data…

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Create a PHP AI agent with LLPhant (powered by OpenAI)

Thomas Hercule8 min read

AutoPHP is a PHP tool within LLPhant framework, tapping into OpenAI's GPT engine for task automation with PHP functions. The article walks through basic and complex examples, illustrating AutoPHP's current capabilities and highlighting its evolving potential.

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API Load Testing: Enhance Your Skills with Locust

Paul Royer4 min read

A server suspended in the air, in a half-light room, with little points of warm light swarming inside and around it

Load testing is a serious job and doing it poorly can have disastrous consequences for big companies' production servers. But load testing is not only for experts in massive companies! You may want to quickly check that your server performances…

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Hexagonal Architecture for Dummies by a Dummy

Gatien Ducornaud7 min read

hexagonal architecture for dummies

TL;DR: You’ll discover the advantages of Hexagonal Architecture in:Simplifying Your Code: Transforming intricate coding and testing efforts into manageable, beginner-friendly tasks. Gaining Real-World Insights: Understand how applying Hexagonal Architecture in actual projects not only upholds code quality but also promotes ongoing…

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Learn how to implement VAT for your e-commerce website with Sylius in 6 minutes

Fabien Charlier8 min read

Learn how to implement VAT for your e-commerce website with Sylius in 6 minutes

If you are using Sylius for your e-commerce website, then you will inevitably come across the subject of Value Added Tax (VAT). As a software engineer at Theodo, I have spent countless hours customizing every one of its aspects, for…

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Journeying to zero accessibility issues with Angular Testing Library

Flora Soussand7 min read

I truly believe that web accessibility is crucial for creating products for everyone. I want to improve the accessibility of my project because I want to ensure equal access for everyone. To improve accessibility, we address some of the issues upon…

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