Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- Mobile development4 min
In-App Purchases vs Payme and Click: When Each Is Allowed
Digital things used inside the app (subscriptions, premium features, game currency) must be sold through the store's in-app purchases; physical goods and real-world services can be paid with Payme, Click or cards.
Basics - Marketing & analytics4 min
Google Analytics 4 vs Yandex Metrica: Which to Use and When
Choose Google Analytics 4 if you advertise mainly in Google Ads and need deep event analysis, and Yandex Metrica if you run Yandex Direct or want built-in session recordings; for audiences in Uzbekistan and the CIS, the practical answer is often to install both with the same goals and UTM tags.
Basics - Design & UX4 min
Gestalt Principles in UI Design With Examples
Gestalt principles describe how the brain automatically groups elements by distance, likeness, shared containers and direction. In UI they let users understand what belongs together and where to look without any extra hints.
Basics - Telegram & messengers4 min
How to Connect a Telegram Bot to amoCRM or Bitrix24
If managers need to chat with customers from inside the CRM, connect the bot via the built-in Telegram channel in amoCRM or Bitrix24 Open Channels; if you need structured leads from a bot scenario, send them via the API after looking up the contact by phone or Telegram ID.
Practice - E-commerce & CRM4 min
How Online Payments Work: Gateway, Acquirer and Processor
A payment travels from the store through the gateway, the acquirer and processor and the card network to the buyer's bank, which approves it and holds the amount; later the money is captured, settled between banks and paid to the store minus fees.
Basics - Security4 min
JWT Security: Common Mistakes and How to Avoid Them
JWT is safe only when the server pins the algorithm, uses a strong key, checks expiry, issuer and audience, keeps access tokens short-lived with rotated refresh tokens, and stores them out of reach of JavaScript.
Advanced - Databases & data4 min
Connection Pooling with PgBouncer: Setup and Pitfalls
PgBouncer lets thousands of clients share a small number of real PostgreSQL connections; use transaction mode for most web and serverless apps, but avoid session-level state and handle prepared statements explicitly.
Advanced - Hosting & cloud4 min
How DNS Works: From Typing a URL to Loading a Site
DNS is the internet's distributed directory: a resolver asks a root server, then the zone's server, then the domain's authoritative server, gets the IP address and caches the answer for the TTL.
Basics - IT careers4 min
How to Evaluate an IT Job Offer: Beyond the Salary
Compare offers not by the number in the email but by take-home pay, payment reliability, team and stack, growth opportunities, real workload and what the contract actually says.
Practice - Tools & no-code4 min
Jira Automation: How to Create Rules Without Code
Every Jira Automation rule is "when (trigger), if (condition), then (action)"; smart values like {{issue.key}} insert task data into actions, and rule executions are limited by your plan, so build narrow rules.
Practice - IT by industry3 min
EMR vs EHR: Electronic Medical Records Explained
An EMR is a patient's electronic record inside one clinic, while an EHR is a health history that different organizations can share; for a private clinic the EMR is the foundation, and data-sharing capabilities are worth planning from the start if patients use several providers.
Basics - Networks & office IT4 min
Network Printer Not Printing: How to Set It Up and Fix It
Most network printer problems are solved by a fixed address (a DHCP reservation), adding the printer by IP instead of auto-discovery, clearing the print queue and using a cable instead of Wi-Fi.
Practice - IT for business4 min
How to Build a Pitch Deck for a Tech Startup
A pitch deck is 10–15 slides that answer an investor's questions in order: what problem you solve, how, for whom, what is already proven, how you make money, who is on the team and how much money you need and for what.
Practice - Web development4 min
Frontend vs Backend: What Is the Difference
The frontend is everything users see and click in a browser or app; the backend is the server-side logic, data and integrations. The two are connected through an API.
Basics - SEO3 min
How Much Does SEO Cost and What Drives the Price
There is no single SEO price: cost depends on niche competition, region, the site's condition and scope of work, while the pricing model defines what you actually pay for. An honest offer lists work and metrics, never a guaranteed number one spot.
Basics - DevOps4 min
GitHub Actions Secrets and Environments: Safe Deploy Setup
Put production credentials in environment secrets behind required reviewers and branch rules, replace long-lived cloud keys with OIDC, give GITHUB_TOKEN minimal permissions, and never run untrusted fork code with access to secrets.
Practice - AI & automation4 min
Custom GPTs and Claude Projects: Building a Team Assistant
Custom GPTs and Claude Projects let you build an assistant from instructions and knowledge files in an hour; that is often enough for internal tasks, while integrations, access control and customer-facing work need a custom bot.
Practice - Programming3 min
Git vs GitHub vs GitLab: What's the Difference
Git is a program that records the history of your code on your machine; GitHub, GitLab and Bitbucket are online services that host Git repositories and build team collaboration around them.
Basics - Mobile development3 min
How to Implement In-App Purchases and Subscriptions
Create products in App Store Connect and Play Console, run purchases through StoreKit and Google Play Billing, validate them and store access status on your server, and set up free trials and purchase restoration per each store's rules or through RevenueCat.
Practice - Marketing & analytics4 min
Google Ads Bidding Strategies: Manual CPC, Target CPA and Target ROAS
Manual CPC suits launches and full control, Maximize Clicks suits gathering traffic without data, and Target CPA or ROAS work once the account steadily collects well-configured conversions and their values.
Practice - Design & UX4 min
Hero Section Design: How to Make the First Screen Work
A good hero answers three questions in seconds — what this is, why it matters to me and what to do next — which takes a clear headline, one primary button, an explanatory visual and a fast load.
Practice - Telegram & messengers4 min
How Much a Telegram Bot Costs and What Drives the Price
The price of a bot is driven by scope, not by the word bot: the number and complexity of scenarios, integrations, payments, an admin panel, a Mini App and support requirements after launch.
Basics - E-commerce & CRM3 min
How to Choose a CRM for a Small Business: Checklist
Choose a CRM by your sales process, not by its feature list: map the process, shortlist 2-3 systems with the integrations you need, trial them on real deals and estimate the total cost of ownership.
Practice - Security4 min
Committed a Secret to Git? What to Do Right Now
Revoke and replace the leaked key first, then check the logs for suspicious use, then purge the history with git-filter-repo, and add gitleaks to pre-commit and CI so it does not happen again.
Practice
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