Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- IT for business4 min
How to Map Business Processes Before Automating Them
First map the process as it runs today, mark bottlenecks and handoffs, then draw the target flow and turn each step into requirements: who does what, with which data and under which rule.
Practice - Web development4 min
How the Browser Event Loop Works: Tasks, Microtasks, Rendering
The browser takes one task, runs it to completion, drains the whole microtask queue and only then may paint a frame; while your code runs, the page neither repaints nor responds to clicks.
Advanced - SEO4 min
Breadcrumbs for SEO: Navigation and BreadcrumbList Markup
Breadcrumbs show where a page sits in the site structure; add a visible trail plus matching BreadcrumbList JSON-LD with sequential positions and canonical URLs so search engines understand the hierarchy.
Practice - DevOps4 min
Caching Layers Explained: Browser, CDN, Reverse Proxy and App Cache
Caching happens at four levels: browser, CDN, reverse proxy and application; static assets are cached as close to the user as possible, personal data only in the application, and the hard part everywhere is invalidating stale data on time.
Basics - AI & automation4 min
AI Coding Assistants: How Developers Use Them Effectively
An AI assistant speeds you up when you give it a clear task and context, then check the result like a colleague's code: with tests, review and your usual security rules.
Practice - Programming3 min
Clean Code: Rules for Naming Variables and Writing Functions
Clean code reads like prose: names say what is stored and what is done, functions are short and do one thing, arguments are few and early returns remove nesting. Comments explain why, not what.
Practice - Mobile development3 min
App Store Privacy Labels and Google Play Data Safety: How to Fill Them
In both forms you declare what data the app and all its SDKs collect, why, and whether it is shared with third parties. Answers must match the app's real behavior and privacy policy, or the store may reject updates or remove the app.
Practice - Marketing & analytics4 min
What Is Call Tracking and How to Set It Up
Call tracking swaps the phone number on your site and in ads so every call is tied to its source: channel, campaign, keyword. Without it, a business that sells by phone only sees form leads and makes decisions on incomplete data.
Practice - Design & UX4 min
How to Build a Design System From Scratch
Build a design system in stages: audit the current interface, define foundations as tokens, create core components, document when to use them and set clear rules for change. Without adoption by the team, even a perfect library stays a dead file.
Advanced - Telegram & messengers4 min
Why WhatsApp Business Numbers Get Banned and How to Avoid It
WhatsApp bans numbers mainly because recipients block and report them after unsolicited bulk messages, missing opt-in or prohibited goods. Message only people who agreed, use the official API, grow volume gradually and watch your quality rating.
Practice - E-commerce & CRM4 min
amoCRM vs Bitrix24: Detailed Comparison for Sales Teams
amoCRM is a focused, easy CRM for the sales pipeline and messengers, while Bitrix24 is a broad platform where CRM sits next to tasks, documents and an intranet; pick based on whether you need sales only or your whole operation.
Basics - Security4 min
Command Injection and Path Traversal: Examples and Prevention
Both attacks happen when user input becomes part of a shell command or file path; prevent them by never invoking a shell, passing arguments as an array, allowlisting values and checking that the resolved path stays inside a base directory.
Practice - Databases & data4 min
Database Deadlocks: Why They Happen and How to Fix Them
A deadlock happens when two transactions each hold a lock the other needs, so the database kills one of them; you fix it by acquiring locks in the same order everywhere, keeping transactions short, and retrying the transaction that was rolled back.
Advanced - Hosting & cloud4 min
How to Host a Static Website on AWS S3 and CloudFront
Site files live in a private S3 bucket, CloudFront serves them over HTTPS through Origin Access Control, ACM issues a free certificate in us-east-1, and your domain's DNS points to CloudFront. You pay only for actual storage, requests and traffic.
Practice - IT careers3 min
Burnout in IT: Warning Signs and How to Prevent It
Burnout starts with chronic exhaustion, cynicism and a sense that work is pointless; it is prevented by firm working-hour boundaries, a realistic workload and an honest, timely conversation with your manager.
Practice - Tools & no-code4 min
Conditional Formatting in Excel and Google Sheets
Conditional formatting colors cells automatically when a condition is true: use built-in rules for simple checks and a custom formula with correct $ anchors for everything else, such as highlighting a whole row.
Practice - IT by industry4 min
How Automated Credit Scoring Works for Lenders
Automated scoring gathers bureau, application and behavioral data, estimates default probability with a model (scorecard or ML), and decision rules then turn that estimate into approval, rejection, limit and rate.
Advanced - Networks & office IT4 min
How to Block Malicious and Unwanted Sites with DNS Filtering
A DNS filter refuses to return addresses for dangerous or banned domains, so the site simply does not open; set up a filtering cloud DNS or your own Pi-hole/AdGuard Home on the router and close the bypass routes — other DNS servers, DoH and VPNs.
Practice - IT for business4 min
CapEx vs OpEx: Accounting for Software Development Costs
Costs of building software that will deliver benefits for years can be capitalized as an intangible asset if the standard's criteria are met; research, maintenance and subscriptions are usually expensed.
Advanced - Web development4 min
How to Turn a Website into a PWA: Manifest and Service Worker
A site becomes a PWA with three things: HTTPS, a manifest file with name and icons, and a service worker that caches assets and serves an offline page without a network.
Practice - SEO4 min
What Is a Canonical Tag and When to Use It
rel=canonical tells search engines which URL is the main one among identical or near-identical pages. It consolidates signals on one version and keeps duplicates out of results, but a wrong setup can deindex the pages you need.
Basics - DevOps3 min
Centralized Logging: Grafana Loki vs ELK Stack
Loki indexes only labels and stores logs cheaply, which suits most teams already on Grafana; ELK indexes full text and searches more powerfully, but needs far more resources and care.
Practice - AI & automation4 min
AI Content Moderation for Comments, Reviews and Chats
Write a moderation policy first, then use a fast moderation API for obvious cases and an LLM classifier for nuanced ones, and send borderline cases to a human.
Practice - Programming3 min
Code Review Checklist: What to Check in a Pull Request
A good review checks in order whether the code solves the task, is understandable, is tested, has no security holes or bottlenecks — and comments target the code, not the person.
Practice
Have an idea or a task? Tell us about it
We'll reply within one business day and propose a solution. The consultation is free.