Decoding recruiter silence
Applying for jobs often means navigating a void of information. The application goes out, and then... silence. This quiet can be frustrating, leadin…
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5 SQL window-function traps that show up in data engineering interviews (with runnable DuckDB examples)
Window functions are the most common SQL topic in data engineering interviews, and most candidates know the syntax. The follow-up questions are wher…
How to explain protecting the AWS root user and everyday admin access in an interview
The interviewer leans back and asks: "You've just created a new AWS account. What's the first thing you do about security?" Many freshers answer "en…
JavaScript Interview Questions Explained: Concepts Every Developer Should Know
JavaScript interviews rarely test syntax alone. Interviewers usually want to understand how well you reason about scope, closures, asynchronous exec…
The STAR Method: Your Interview Lightsaber
The Quest Begins (The "Why") I still remember my first round of behavioural interviews like it was yesterday. I walked in, polished resume in hand,…
How to Answer 'Tell Me About Yourself' as a Software Engineer (With a Word-for-Word Framework)
"Tell me about yourself" is the first question in almost every interview, and most engineers waste it. The typical answer is a chronological tour of…
5 JavaScript concepts I kept forgetting (so I made them my lock screen)
I used to "learn" the same JavaScript concepts every few months. I'd read about the event loop, nod along, and a month later get a predict-the-outpu…
A Complete Guide to A/B Testing for Data Analysts
A/B testing sounds simple: show half your users version A, the other half version B, and pick the winner. In practice, it’s one of the easiest place…
2026 - Backend Interview Questions
1. Core Java & OOP Write an immutable class in Java Comparable vs Comparator with examples What is a Functional Interface? Can it have default a…
SQL Interview Question: Find App Store Power Purchasers with Two-Level GROUP BY
Some SQL problems look simple until you read the rules twice. This one is tagged Apple and rated hard, and it teaches a useful pattern: grouping the…
LeetCode 4000 - 4010 problems: patterns and approaches explained
LeetCode has started publishing problems numbered 4000 and above. At the time of writing this post, there are already 4055 problems. In this post, I…
Nobody Warns You the Data Engineering Interview Isn't About Data Engineering
I've sat on both sides of the interview table more times than I can count. Here's the thing nobody tells you going in: the interview almost never te…
Design YouTube — Video Upload, Transcoding & CDN Delivery at Scale (with Production .NET Code)
"Design YouTube" is where two systems live in one product, pulling in opposite directions. The write side is a brutal batch-processing problem: some…
The Hard Truth About Data Engineering Interviews Nobody Tells You
It's 11 PM. You've solved forty LeetCode mediums this month. Your GitHub has a shiny new Airflow project with green checkmarks all the way down. Tom…
JavaScript and TypeScript Interview Questions Explained With Real Production Examples
Most explanations of these concepts stop at the definition. Scope gets a rule about hoisting. Closures get a counter function that increments a numb…
Building My Own Technical Interview Practice Repository
Preparing for technical interviews has made me realize something: solving more exercises doesn't necessarily mean practicing better. I've spent quit…
I kept failing interviews on delivery, so I built a practice coach that scores eye contact
The answers were usually fine. The first 90 seconds were not. I would leave a call knowing what I meant to say, and also knowing I had looked at the…
A Mind Map for Mobile System Design Preparation
Mobile system design interviews can feel overwhelming. You're asked to design something that sounds simple — a news feed, chat application, ride-sha…
The Gap Between College SQL and Industry Reality When I was in college, I thought I knew databases.
I sat in my 300-level database concepts class and wrote SELECT * FROM users JOIN orders ON users.id = orders.user_id. I got an A. I felt like a geni…
I built a free, interactive SQL practice tool for data engineering interviews
Most data engineering interview prep resources I found online were static — a list of questions with answers underneath. You read the answer, nod, a…
Node.js interview deep dive: what they are really testing
Almost every senior Node question is the same question wearing a different hat: do you understand that there is one thread doing your work, and do y…
Your degree got you the interview. This is why it isn't getting you the job.
I'm in a lot of Facebook groups. Dev groups, IT groups, job groups, here in the Philippines. And there's one post I see more than any other. It goes…
The Bug That Passed Every Test — And Still Took Production Down
A few years ago, I was working on a backend service that looked completely healthy. Tests were green. CPU usage was normal. Memory looked fine. No o…
Azure Integration Services Interview Prep Part 3: Managed Identity, Key Vault, VNet , Private Endpoints, NSGs, RBAC and Token Validation
Part 1 covered the messaging services - Service Bus, Storage Queues, Event Hub, Event Grid. Part 2 covered the orchestration layer that processes wh…
HTML, CSS and Bootstrap Interview Questions
HTML Interview Questions 1. What is HTML? HTML stands for HyperText Markup Language. It is used to create the structure of a webpage. We use HTML to…
UPI at Scale: Handling Millions of Payments
Imagine this: It's salary day. It's 2 PM. Millions of people across India suddenly open their UPI apps and start paying rent, sending money to famil…
The Interview Question That Quietly Sinks Excellent European Engineers
You didn't fail the coding round. You failed a sentence. Here's a scenario I hear constantly from senior engineers in Prague, Berlin, Warsaw, and Li…
Day 4 as a Full Stack Intern: Flexbox
Flexbox is a one-dimensional layout system used to arrange elements in a row OR a column. Once you understand main axis + cross axis, almost everyth…
Every interview question has a second question behind it. Here are 7
Interviewers rarely ask for the thing they want to know. They ask for something adjacent, cheap to answer, and easy to score, and then they listen t…
My Exact Cognizant GenC Interview Experience & Hiring Process (2025–2026)
Well, if you are preparing for Cognizant On-Campus drive, chances are that you already know that it’s a marathon. I went through the entire 2025-202…