Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- E-commerce & CRM4 min
What Is a CRM System and Why Does a Business Need One
A CRM is a single database of customers and deals that keeps every conversation, task and sales stage in one place, so no lead gets lost and anyone on the team can see what is happening with a customer right now.
Basics - Security4 min
What Is Two-Factor Authentication (2FA) and Why Turn It On
Two-factor authentication asks for a second proof of identity, such as a code from your phone, on top of the password, so a stolen password alone no longer opens the account; turn it on first for email, Google or Apple, banking and Telegram.
Basics - Tools & no-code4 min
What Is Jira and How Does It Work
Jira is Atlassian's work tracker: every task is an issue inside a project, issues are grouped into epics, shown on Scrum or Kanban boards and moved through a workflow of statuses; it suits teams that need structure, reports and a traceable process.
Basics - IT by industry4 min
How to Reduce Patient No-Shows With Automated Reminders
No-shows drop when the reminder arrives in a channel the patient reads, at the right time, with a single "confirm" or "cancel" button, and when a freed slot is instantly offered to the waitlist; you verify the effect by comparing the no-show rate before and after launch.
Practice - IT for business3 min
Software Maintenance and Support: Models and Pricing
A retainer fits products the business depends on daily, hourly billing fits irregular changes, and per-ticket pricing fits rare small requests. Choose the volume by how often things change and what downtime costs you.
Practice - Web development3 min
TypeScript with React: Typing Props, State, Events and Hooks
Describe props with a type, let hooks infer what they can, take event types from React and validate API data at the boundary — that covers most real cases.
Practice - SEO3 min
Ahrefs vs Semrush vs Serpstat: How to Choose an SEO Tool
Ahrefs is strongest on backlinks, Semrush has the broadest marketing toolkit and Serpstat is a more affordable option with good Russian-language coverage; for Uzbekistan, test each database on your own queries and don't overlook free Search Console and Yandex Webmaster.
Practice - DevOps3 min
How to Set Up SSH Key Authentication on a Server
Generate an ed25519 key with ssh-keygen, copy the public part with ssh-copy-id, confirm key login works, and only then disable password login in sshd_config.
Practice - AI & automation4 min
Self-Hosting LLMs in Production With vLLM
vLLM serves open models on your own GPUs through an OpenAI-compatible API with efficient batching; it pays off when load is steady, data must stay in-house, and you have people to operate it.
Advanced - Programming4 min
Test-Driven Development (TDD): A Step-by-Step Guide
TDD is a short loop: write a failing test first, then the minimum code to make it pass, then improve the code while the tests keep you safe.
Practice - Mobile development4 min
What Is Kotlin Multiplatform and When Does It Make Sense
Kotlin Multiplatform (KMP) lets you write business logic, networking and data handling once in Kotlin and use it on iOS and Android while keeping the UI native. It makes sense when native UX matters and you already have Android expertise.
Basics - Marketing & analytics4 min
What Is End-to-End Marketing Analytics and Why Businesses Need It
End-to-end analytics links data from the ad click to the payment: ad spend, visits, requests, CRM deals and revenue are combined into one report, so you see how much money each channel brought, not just how many leads.
Basics - E-commerce & CRM4 min
What Is Dropshipping and How the Model Really Works
Dropshipping is a model where your store sells a product but a supplier stores and ships it; you save on inventory but pay with thin margins, less control over quality and delivery, and dependence on the supplier.
Basics - Security4 min
What Is a Web Application Firewall (WAF) and Do You Need One
A WAF is a filter in front of your site that inspects HTTP requests and blocks common attacks such as SQL injection and XSS. It lowers risk but does not replace updates or secure code, and it pays off mainly for sites with forms, user accounts, payments or high visibility.
Basics - Tools & no-code4 min
What Is No-Code and Low-Code: Possibilities and Limits
No-code lets you build sites, apps and automations visually without programming, low-code adds the option to write code where the visual builder falls short; both are fast for prototypes and internal tools, but they tie you to a platform and hit limits on complex logic, load and cost at scale.
Basics - IT by industry4 min
How to Control Food Cost With Inventory Software
Food cost is under control when every dish has a recipe card, each sale automatically deducts ingredients from stock, and regular counts compare actual stock with expected stock — the gap is your loss from theft, waste and mistakes.
Practice - IT for business4 min
Warranty Period in Software Development: What Gets Fixed Free
A warranty means free fixes for defects, that is, deviations from the agreed specification, for a set period after delivery. New features and problems caused by environment changes are not covered; that is what a support contract is for.
Basics - Web development4 min
Vite vs Webpack: Modern Frontend Build Tools Compared
For a new project Vite is usually simpler and faster; Webpack remains a sensible choice for large legacy projects with complex custom configuration where migration would not pay off.
Practice - SEO3 min
SEO vs Paid Search Ads: Which One Your Business Needs
Paid search brings leads immediately, but only while you keep paying for clicks. SEO is slower but delivers unpaid traffic for a long time, so most businesses do best starting with ads while building SEO in parallel.
Basics - DevOps3 min
Structured Logging: How to Write Logs That Are Easy to Search
Write logs as JSON with a fixed set of fields — time, level, service, message and request ID; then any error is found with a filter instead of reading thousands of lines.
Practice - AI & automation5 min
Semantic Caching for LLM Apps: Cut Latency and API Costs
A semantic cache stores LLM answers next to the embedding of the question and returns a saved answer when a new question is close enough in meaning, which saves time and tokens; it is safe only for answers that do not depend on the user or on fast-changing data.
Advanced - Programming4 min
Two Pointers and Sliding Window: Patterns for Array Problems
Two pointers and sliding window replace nested loops with a single pass: each pointer only moves forward, so every element is handled a constant number of times and complexity drops from O(n²) to O(n).
Practice - Mobile development4 min
Mobile App Development Explained: How an App Goes from Idea to Store
A mobile app goes through six stages: discovery, design, development, testing, store release and support. At the end you get not just a published app but the source code, design files, store accounts and a plan for what comes next.
Basics - Marketing & analytics4 min
What Is Google Analytics 4 and How Its Data Model Works
Google Analytics 4 is Google's free analytics for websites and apps where everything, from a page view to a purchase, is recorded as an event with parameters; you mark the events that matter to the business as key events and read results in standard reports and explorations.
Basics
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