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📰 Dev.to · David

9 articles · Updated every 3 hours · View all reads

All Articles 164,831 Blog Posts 158,106 Tech Tutorials 43,680 Research Papers 31,772 News 21,181 ⚡ AI Lessons

I built Commitea: Git and GitHub explained in Spanish, with an interactive visualizer

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 1mo ago

I built Commitea: Git and GitHub explained in Spanish, with an interactive visualizer

When I started programming, Git was hard for me — like anything new is at first. Over time I noticed...

Stop hardcoding JSON. I built a free cloud mock API with dynamic Faker.js data + AI generation

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 3mo ago

Stop hardcoding JSON. I built a free cloud mock API with dynamic Faker.js data + AI generation

We've all been there. You're three days into a new dashboard feature. The backend is "almost done."...

How I finally wrapped my head around unit testing

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 5mo ago

How I finally wrapped my head around unit testing

(Originally posted on Medium) This is the second article in my Expense Tracker series. In my...

Free Developer Tools for Testing: IBAN, IMEI, Credit Cards & More

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 6mo ago

Free Developer Tools for Testing: IBAN, IMEI, Credit Cards & More

Why Developers Need Test Data Generators If you've ever built a payment form, a mobile...

Why Your Payment Testing Is Broken (And How to Fix It With Random IBANs)

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 6mo ago

Why Your Payment Testing Is Broken (And How to Fix It With Random IBANs)

If you've ever hardcoded DE89370400440532013000 into a test case, we need to talk. The...

How I Generate Realistic Test Data Without Writing a Single Line of Code

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 6mo ago

How I Generate Realistic Test Data Without Writing a Single Line of Code

Every developer has been there: you're building a payment form, testing an API, or writing...

5 Free Developer Tools That Should Be in Every QA Engineers Bookmark Bar

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 6mo ago

5 Free Developer Tools That Should Be in Every QA Engineers Bookmark Bar

Testing is only as good as your test data. And let's be honest — most of us have been there:...

The Luhn Algorithm Explained: How Credit Card Numbers Are Validated

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 6mo ago

The Luhn Algorithm Explained: How Credit Card Numbers Are Validated

You enter a credit card number into a checkout form. Before any network request fires, the form...

JSON Formatting 101: Pretty Print, Validate, and Debug Like a Pro

Dev.to · David 🔧 Backend Engineering ⚡ AI Lesson 6mo ago

JSON Formatting 101: Pretty Print, Validate, and Debug Like a Pro

You just hit an API endpoint and got back a wall of minified JSON. It's 2,000 characters of brackets,...