Samuel Ochaba

Founder of Keel Academy, a self-paced AI engineering course for developers who already build software.

Joined on Nov 8, 2025 samuel.ochaba.dev@gmail.com https://learn.keelacademy.com/?utm_source=devto&utm_medium=social&utm_campaign=profile

Work

Founder at Keel Academy

Samuel Ochaba

Nov 9

This LLM cost function looks right. Can you spot the bug?

#ai #llm #python #openai

3 min read

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Samuel Ochaba

Sep 8

Stop Building AI Wrappers Nobody Buys

#ai #career #business #engineering

4 min read

Samuel Ochaba

Jun 21

Garbage Collection Isn't Magic: Why Your App Still Leaks Memory

#discuss #javascript #performance #beginners

4 min read

Samuel Ochaba

Jun 21

Stop Hitting Yourself: The Quiet Lie in Function Signatures

#discuss #typescript #webdev #beginners

4 min read

Samuel Ochaba

Apr 9

Refactoring is not a bag of tricks. It is a professional discipline.

#refactoring #softwareengineering #python #ai

3 min read

Samuel Ochaba

Jan 23

The Python Bug That Bites Every Developer (Exactly Once)

#python #programming #beginners #debugging

2 min read

Samuel Ochaba

Jan 18

Why You Freeze When Starting a New Project (And 5 Questions to Fix It)

#python #beginners #productivity #architecture

2 min read

Samuel Ochaba

Jan 12

Why Your Python Code Takes Hours Instead of Seconds (A 3-Line Fix)

#python #performance #beginners #programming

2 min read

Samuel Ochaba

Jan 11

Python Sets: remove() vs discard() — When Silence Is Golden

#python #programming #tutorial #webdev

2 min read

Samuel Ochaba

Jan 10

Python Dictionary Views Are Live (And It Might Break Your Code)

#python #programming #webdev #beginners

2 min read

Samuel Ochaba

Jan 9

Why Your Python Tuple Can't Be a Dictionary Key

#python #programming #computerscience #ai

1 min read

Samuel Ochaba

Jan 8

You Know Python Basics—Now Let's Build Something Real

#python #beginners #gamedev #programming

3 min read

Samuel Ochaba

Jan 7

Type Hints Make AI Code Generation Significantly Better

#python #ai #typing #productivity

1 min read

Samuel Ochaba

Jan 6

Python Comprehensions Are Declarative (And Why That Matters)

#python #programming #cleancode #tutorial

2 min read

Samuel Ochaba

Jan 6

The Python Matrix Gotcha That Silently Corrupts Your Data

#python #bugs #programming #tutorial

2 min read

Samuel Ochaba

Jan 6

Why sum(x**2 for x in range(1000000)) Uses 4000x Less Memory

#python #performance #programming #tutorial

2 min read

Samuel Ochaba

Jan 6

The Two `if` Statements in Python Comprehensions (And Why Beginners Mix Them Up)

#python #programming #beginners #tutorial

2 min read

Samuel Ochaba

Jan 5

The Python Loop Bug That Causes Silent Data Loss

#python #beginners #programming #debugging

2 min read

Samuel Ochaba

Jan 5

Python's else on Loops: The Feature You're Not Using

#python #programming #tutorial #beginners

2 min read

Samuel Ochaba

Jan 4

How Python Strings Actually Work

#python #beginners #programming #performance

2 min read

Samuel Ochaba

Jan 3

"is" vs "==": The Python Operator That Trips Up Beginners

#python #beginners #programming #tutorial

3 min read

Samuel Ochaba

Jan 3

Why I Teach Variables as "Sticky Notes", Not Boxes (And Why It Will Save You Hours of Debugging)

#python #beginners #programming #tutorial

4 min read

Samuel Ochaba

Jan 2

Your First Python Program: What They Don't Tell Beginners About Error Messages

#pythin #beginners #programming #tutorial

3 min read

Samuel Ochaba

Jan 1

The AI Engineer Roadmap for 2026: Why Steps 1-2 Determine Everything

#ai #python #career #machinelearning

1 min read

Samuel Ochaba

Dec 31 '25

Why the Command Line Still Matters in 2026 (And the Only 15 Commands You Need)

2 min read

Samuel Ochaba

Dec 11 '25

Base LLMs vs Instruction-Tuned LLMs: Understanding the Architecture Behind ChatGPT and Claude

#ai #machinelearning #llm #python

3 min read

Samuel Ochaba

Dec 8 '25

The 2025 Engineering Reality Check: Why "Boring" is the New Brave

#webdev #ai #programming #javascript

3 min read

Samuel Ochaba

Dec 4 '25

Memory Leaks in Modern JS: A Deep Dive into Closures and Garbage Collection

#javascript #webperf #architecture #debugging

2 min read

Samuel Ochaba

Dec 4 '25

The "Separation of Concerns" Lie: Why Your "Clean" Architecture is Actually Spaghetti

#architecture #react #cleancode #webdev

3 min read

Samuel Ochaba

Dec 1 '25

JavaScript Generators: The "Pause" Button for Your Code

#webdev #ai #programming #javascript

4 min read

Samuel Ochaba

Dec 1 '25

The AI Refactoring Trap: Why "Messy" Code is Often Better

#webdev #ai #programming #productivity

3 min read

Samuel Ochaba

Dec 1 '25

The "Shallow Developer" Trap: Why AI Code Breaks in Production

#webdev #ai #webperf #javascript

3 min read

Samuel Ochaba

Nov 28 '25

From Callback Hell to Async Heaven: A Crystal-Clear Guide to JavaScript Promises

#tutorial #webdev #javascript #programming

7 min read

Samuel Ochaba

Nov 26 '25

Breaking Free from Single Inheritance Chains With JavaScript Mixins

#webdev #javascript #tutorial #programming

4 min read

Samuel Ochaba

Nov 25 '25

The Secret Life of JavaScript Objects: Flags and Descriptors

#javascript #webdev #beginners #programming

4 min read

Samuel Ochaba

Nov 24 '25

Three Programming Superpowers In One Function

#javascript #computerscience #webdev #tutorial

7 min read

Samuel Ochaba

Nov 23 '25

Stop Memory Leaks! The Practical Guide to WeakMap and WeakSet

#javascript #webdev #performance #tutorial

4 min read

Samuel Ochaba

Nov 22 '25

This 'Innocent' Array Pattern Quietly Kills Your JavaScript Performance

#javascript #performance #webdev #programming

4 min read

Samuel Ochaba

Nov 21 '25

When JavaScript Symbols Actually Matter in Production

#webdev #javascript #tutorial #programming

4 min read

Samuel Ochaba

Nov 21 '25

Stop Using `?.` Everywhere - You're Hiding Your Bugs

#javascript #webdev #debugging #bestpractices

4 min read

Samuel Ochaba

Nov 19 '25

Optimistic UI Updates: Why Your App Feels Slow When It's Actually Fast

#webdev #javascript #performance #programming

6 min read

Samuel Ochaba

Nov 18 '25

Understanding F.prototype in JavaScript: A Complete Guide

#beginners #javascript #tutorial

6 min read

Samuel Ochaba

Nov 17 '25

Understanding Prototypal Inheritance in JavaScript: A Deep Dive

#webdev #programming #javascript #tutorial

4 min read

Samuel Ochaba

Nov 13 '25

Beyond Basic Debouncing: What I Learned Building Search for a Logistics App

#webdev #tutorial #performance #softwaredevelopment

3 min read

Samuel Ochaba

Nov 11 '25

JavaScript Decorators: Supercharge Your Functions Without Changing Them

#designpatterns #javascript #performance

5 min read

Samuel Ochaba

Nov 11 '25

Understanding Function Binding in JavaScript: A Beginner's Guide

#webdev #programming #javascript #beginners

3 min read

Samuel Ochaba

Nov 10 '25

The Closure Trap: A JavaScript Bug That Shows Why Fundamentals Still Matter in the AI Era

#javascript #webdev #closures #programming

4 min read

Samuel Ochaba

Nov 10 '25

Understanding JavaScript Scope and Closures: A Deep Dive into Lexical Environments

#webdev #javascript #beginners #closure

4 min read

Samuel Ochaba

Nov 9 '25

Stop Coding in Chaos: Why You Need a Pro Dev Environment Now (And How to Set It Up)

#webdev #devex #typescript #git

4 min read

One Year Club

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1 Week Community Wellness Streak

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