Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- Mobile development4 min
How to Publish an App on the App Store: Step-by-Step Guide
You need an active Apple Developer Program membership, a signed build and a complete App Store Connect listing with screenshots and a privacy policy; once Apple approves it, you release immediately, on a date or in phases.
Practice - Marketing & analytics4 min
How to Start an Email Newsletter: Platform, List and First Emails
Pick an email platform by the features you will actually use, collect subscribers only with consent via double opt-in, tag them from day one, automate a welcome email and send at a pace you can sustain.
Practice - Design & UX4 min
UX Research Methods: Which One to Use and When
Pick the method by the question: "why" and "what people think" call for interviews and diary studies, "how many" and "how often" for surveys and analytics, "can people use it" for usability tests, and "how to structure navigation" for card sorting.
Basics - Telegram & messengers4 min
How to Send Website Form Submissions to Telegram
The form posts to your server, which validates the data, saves the lead and calls the Bot API sendMessage with a token from environment variables; on failure it retries, and the lead stays in the database either way.
Practice - E-commerce & CRM4 min
How to Set Up Promo Codes and Discounts Without Losing Margin
A discount pays off only if extra sales cover the lost margin: calculate the break-even point upfront, restrict stacking and usage, and issue codes in a way that keeps them off coupon sites.
Practice - Security4 min
Website Hacked: A Step-by-Step Incident Response Plan
If your site is hacked, do not delete everything in a panic: first limit the damage and keep a copy for analysis, then find how the attacker got in, restore from a clean source, rotate every password and key, notify users if required and ask search engines to review the site.
Practice - Databases & data4 min
What Is a Database and How Does It Work
A database is an organized store of information, and a DBMS is the software that saves it to disk, finds what you ask for quickly and keeps the data consistent when many users work with it at once.
Basics - Hosting & cloud3 min
What Is Vercel and How It Differs from Classic Hosting
Vercel is a platform that builds and publishes your frontend and serverless functions on every git push, with no servers to manage. It is great for sites and web apps on Next.js and similar frameworks, and a poor fit for long-running jobs and heavy backends.
Basics - IT careers3 min
System Design Interview: How to Prepare and Structure Answers
A system design interview evaluates your reasoning, not a "correct" diagram: clarifying requirements, rough estimates, a clear architecture and an honest discussion of trade-offs. Prepare with one framework and practice it out loud on classic problems.
Advanced - Tools & no-code4 min
Tilda vs Webflow: Which Website Builder to Choose
Tilda is quicker to learn and better for landing pages and CIS projects that need local payments and a Russian interface. Webflow offers more layout freedom, a powerful CMS and interactions, and suits complex marketing sites aimed at a global audience.
Basics - IT by industry4 min
How to Add OneID Login to a Website or App
OneID works like an OAuth 2.0 authorization code flow: the user signs in on OneID, your server exchanges a one-time code for a token and receives verified data; your organization must first get access from the system operator and keep secrets server-side only.
Advanced - Networks & office IT4 min
Wi-Fi Channel Planning and Interference in Dense Offices
In a dense office, Wi-Fi gets faster through order rather than power: narrow channels in 5 GHz, only 1/6/11 in 2.4 GHz, lower AP power, sensible roaming thresholds and placement for capacity rather than coverage.
Advanced - IT for business4 min
Red Flags When Hiring a Developer or Agency
The main red flags are a suspiciously low or instant quote, no written scope, refusing to share code and access, vague timelines and full prepayment. Each has a simple defense: written agreements and payment tied to results.
Practice - Web development4 min
React UI Libraries Compared: MUI vs Ant Design vs shadcn/ui
Ant Design is the fastest way to build a data-heavy admin panel, MUI is a balanced choice with a strong theming system, and shadcn/ui suits projects with a custom design because you own and edit the component code.
Practice - SEO4 min
Redirect Chains and Loops: How to Find and Fix Them
A redirect chain is several hops before the final page, and a loop never reaches one; fix both by pointing every old URL and internal link straight to the final address with a single 301 or 308.
Practice - DevOps3 min
Nginx Config for Static Sites and Single-Page Applications
For an SPA, Nginx only needs a root pointing to the build and try_files $uri $uri/ /index.html; give hashed assets a long cache and keep index.html uncached.
Practice - AI & automation3 min
LLM Temperature and Top-p: How to Set Generation Parameters
Temperature controls how random the choice of the next token is, while top-p limits that choice to the most likely options. Use low values for precise tasks, higher ones for creative work, and usually change only one parameter.
Basics - Programming4 min
Recursion Explained: Base Cases, Call Stack and Examples
Recursion is a function solving a problem by calling itself on a smaller subproblem; it needs a base case where the calls stop, otherwise the call stack overflows.
Basics - Mobile development4 min
How to Publish an App on Google Play: Step-by-Step Guide
Publishing on Google Play means a verified Play Console account, a signed AAB, completed declarations (rating, Data Safety, privacy policy), a store listing, testing tracks and a reviewed release; new personal accounts must pass closed testing first.
Practice - Marketing & analytics4 min
How to Advertise in Telegram: Telegram Ads and Channel Placements
Telegram Ads gives you short, controlled ads targeted by channels and topics, while paid posts are native placements in other channels; in both cases every link needs a UTM tag, its own invite link or a bot deep link.
Practice - Design & UX4 min
Visual Hierarchy in Design: How to Guide the Eye
Visual hierarchy is the order in which the eye reads a screen, and you control it with size, contrast, color, spacing and position. Pick one main element per screen, make it the strongest, and deliberately weaken everything else.
Basics - Telegram & messengers3 min
What Are Telegram Stars and How Payments for Digital Goods Work
Telegram Stars are Telegram's in-app currency, required for digital goods and services in bots and Mini Apps; physical goods and offline services are still paid through regular payment providers.
Basics - E-commerce & CRM4 min
Recurring Payments and Card Tokenization: How Auto-Billing Works
On the first payment the provider stores the card and gives the store a token; the store then charges that token on schedule, while the provider and bank check that the customer has consented to such charges.
Basics - Security4 min
Website Security Checklist Before Launch
Before launch, enforce HTTPS and security headers, lock down the admin panel, remove default accounts and debug mode, update everything, protect forms, and make sure backups restore and errors reach you.
Practice
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