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Articles 177,811Blog Posts 163,975Tech Tutorials 47,447Research Papers 34,914News 22,307
⚡ AI Lessons
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
9h ago
Authorization in Rails: Why a Record ID Is Never Enough
A record ID identifies data. It does not prove that the requester may read or change it. Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
1d ago
How your terminal works, one keypress at a time (IWSET #3)
Last week we took an LLM apart token by token. This week: the black window you type in every day and have probably never questioned. Continue reading on Medium
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
1d ago
20 Advanced Java Interview Questions You Should Revise Before Your Next Interview
If you have a Java interview coming up, don’t spend all your time revising basic syntax, OOP concepts, or definitions. Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2d ago
Understanding PL/SQL Exception Handling | Interview Version | Best of mrcaption49
PL/SQL Exception Handling provides a controlled mechanism to handle runtime errors without abruptly terminating the application. It allows… Continue reading on
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
5d ago
TypeScript finally stopped making me wait
A decade-old JavaScript compiler got rewritten in Go, and the first thing I noticed was how much dead time it removed from my day Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
6d ago
Symfony 8.1: Fixing the Hidden Cost of Worker Mode
How automatic kernel resets prevent state from leaking between requests in long-running workers. Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Handling API Failures Gracefully in Angular: Practical Error Handling Patterns Every Frontend…
APIs can fail because of network problems, expired sessions, server errors, incorrect requests, or temporary outages. Instead of allowing… Continue reading on M
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Senior Java Interview Questions Aren’t Hard. The Follow-Ups Are.
Most Java developers can explain HashMap, transactions, garbage collection, and concurrency. Senior interviews are designed to find out… Continue reading on Sta
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Cannot Assign Requested Address in Production: The Connection Failure Most Backend Engineers Blame…
Your API is healthy. PostgreSQL is healthy. Kubernetes is healthy. Then thousands of outbound connections start failing and everyone… Continue reading on Javare
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
We Fixed N+1 With Eager Loading. Memory Usage Tripled.
Query count fell from 801 to one. The one query expanded into more data than the application could hold. Continue reading on Artificial Intelligence in Plain En
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Spring Boot Interview Questions 2026: The Complete Guide to Cracking Java Backend Interviews
Most Spring Boot interviews are not difficult because the framework has too many annotations. Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Node.js vs Bun vs Deno in 2026: The Ultimate JavaScript Runtime Comparison
Discover the differences between Node.js, Bun, and Deno, including performance, security, TypeScript, and the best use cases in 2026. Continue reading on Medium
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Why are Nest.js
If you’re a front-end or Node.js developer opening a Spring Boot project for the first time, you may experience a strange combination of… Continue reading on Me
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
The Database Isn’t Slow. Your Spring Boot Application Is Holding Connections Too Long.
There’s a production failure I’ve seen people diagnose completely backwards. Continue reading on Javarevisited »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Stop Returning 200 for Errors in Spring Boot: 5 Problem Detail Patterns Senior Engineers Use
Your API can have the correct business logic and still have broken HTTP semantics. Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Most Senior Backend Engineers Are Not Actually Good at Making Decisions
They know how to build systems. They struggle when the system forces them to choose between two bad options. Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
Connection Storms — When Your PHP App Reconnects All At Once
Database failover triggered a 90-minute outage. The retry pattern that would have made it 60 seconds. Verified backoff + jitter. Continue reading on CodeX »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
A user uploaded a very large file during production and caused me to run out of memory (OOM).
Uploading a large file sounds simple — until the file is several hundred megabytes or even multiple gigabytes. Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
2w ago
15 Java and Spring Boot Production Scenarios
Java and Spring Boot interviews are increasingly moving beyond theoretical questions such as “What is dependency injection?” or “What is… Continue reading on Me
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
3w ago
Java Strings Explained: Immutability, String Pool, StringBuilder, StringBuffer, and What Really…
One of the easiest things to write in Java is: Continue reading on Medium »
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
3w ago
I Negotiated 6 Backend Engineering Offers in 2026. Here Is the Data Nobody Publishes.
Not the final numbers. The actual log: what I said, what they countered with, and the one sentence that added more than every spreadsheet… Continue reading on C
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
3w ago
I Interviewed 60 Backend Engineers This Year as the Hiring Manager.
Not resume tips. The actual log: what separated the offers from the rejections, and the one pattern that had nothing to do with technical… Continue reading on L
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
3w ago
What is XML Schema (XSD)? Explained with Examples
XML Schema (XSD) is a language used to define the structure and rules of an XML document. It describes elements, attributes, data types… Continue reading on Med
Medium · Programming
🔧 Backend Engineering
⚡ AI Lesson
3w ago
I Was On-Call for My First 6 Months as a Senior Backend Engineer. Here Is the Log Nobody Publishes.
Not the highlight reel. The actual incident-by-incident data: what paged me, what I got wrong, and the one habit that changed everything… Continue reading on Le
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