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1. PYTHON SELENIUM ARCHITECTURE Selenium is one of the most widely used tools for automating web applications. When we use Selenium
Picture this. A test starts failing in CI. You pull the branch locally, run the suite, and it passes. You dig in for twenty minutes before realising t
Shopify data engineering interview questions are SQL end-to-end with a sharp merchant-sessions analytics edge: five SQL primitives (DATE_TRUNC('month'
PayPal data engineering interview questions are Python end-to-end with a payments-analytics edge: five Python primitives (list comprehensions for filt
Your agent has 40 tools. Each tool definition — name, description, JSON Schema parameters — costs roughly 200 tokens. That's 8,000 tokens before the a
The problem I wanted to solve Every automation tool I tried had the same issue: fire and forget. It sends the command and hopes for the bes
Last week, I finally snapped. Our “legacy” news aggregator was crawling 200 sites in 8 minutes, with two database timeouts along the way. Ops complain
Hyper data engineering interview questions are SQL end-to-end with a sharp retail-analytics edge: six SQL primitives (aggregation with ORDER BY ... LI
Here’s the story: last week my boss threw a “simple” task at me — pull data from 120 internal APIs simultaneously and compile a report. I thought, “Th
It happened last year when I was adding a “batch domain liveness check” feature to our internal operations platform. The requirement was simple: perio
Last Friday at 5 PM, right when I was about to close my laptop and sneak out, the alert channel exploded — the online data collection service had a ti
Last month, the data platform I maintain suddenly got a new requirement: run health checks against 100+ downstream services. Each endpoint averages 20
Here’s the situation: we have a data collection service that fetches data from a dozen upstream APIs. The synchronous version took a painful 30 minute
Last week I was building an internal monitoring tool that needed to fetch pages from over 200 websites concurrently. Our old synchronous script took m
Visualizing Bending Moment Diagrams with Matplotlib for Structural Engineers title: "Visualizing Bending Moment Diagrams with Matplotlib
Last month I watched a production LLM agent get fully hijacked. Not through a model vulnerability. Not a leaked API key. Through a PDF. A user upload
The Problem You deploy an MCP server. Agents start calling tools. Something breaks. How do you know? Right now, you don't. Most MCP serve
Healthcare AI builders keep tripping the same wire. You ship a chatbot. Someone pastes a patient note into it. The note hits OpenAI. OpenAI hasn't si
Python Decorators Explained Simply Introduction Python Decorators Explained Simply is essential knowledge for every developer.
Hey friends! Today's adventure adds a key feature to our Breakout clone - the ability to save our progress, and load it back. Thing is, we don't wan