Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- IT for business4 min
Dedicated Development Team Model: How It Works
A dedicated team is a group of the vendor's specialists who work only on your product while you pay for their time and set priorities yourself. It suits long-lived products with changing requirements, not short tasks with a precise spec.
Basics - Web development3 min
Code Splitting and Lazy Loading in JavaScript Apps
Code splitting breaks your bundle into chunks loaded only when needed: routes separately, heavy components via dynamic import, with prefetching to load likely next steps ahead of time.
Practice - SEO4 min
Core Web Vitals Field vs Lab Data: CrUX, Lighthouse and RUM
Lighthouse measures one load in artificial conditions, while Search Console shows real Chrome users over 28 days at the 75th percentile, so the numbers differ; to track fixes you need your own RUM.
Advanced - DevOps4 min
Should You Run Databases in Docker or Kubernetes
Docker is ideal for databases in local development and CI; in production, small teams are usually better off with a managed database, while running it in Kubernetes pays off only with a mature operator and people who can operate it.
Advanced - AI & automation3 min
AI Hallucinations: Why LLMs Make Things Up and How to Reduce It
An LLM predicts plausible text rather than checking facts, so it sometimes makes things up. Grounding in your data (RAG), demanding citations, allowing "I don't know" and automated checks reduce this.
Basics - Programming4 min
Compiled vs Interpreted Languages: How Code Runs
A compiler translates code into machine instructions before it runs, an interpreter executes it as it goes, and most modern languages mix both via bytecode and JIT — so the specific implementation matters more than the label.
Basics - Mobile development4 min
ASO Checklist: Title, Keywords, Screenshots and Ratings
ASO is the work on your store page that helps people find your app for the right searches and install it more often. The core: keywords in the title and metadata, strong first screenshots, a localized listing, review management and regular A/B tests.
Practice - Marketing & analytics4 min
CPC, CPM, CPA: How Online Ad Pricing Models Work
CPM means paying per thousand impressions, CPC per click and CPA per target action. In every model the price is set by an auction that weighs your bid against predicted ad quality, and the right model depends on your goal: reach, traffic or conversions.
Basics - Design & UX4 min
Color Theory Basics for UI Designers
In UI, color is a tool for meaning and focus, not decoration: pick one primary brand color, build a wide neutral scale for most of the interface, add semantic colors for statuses and keep accents rare. Thinking in HSL makes it easy to generate consistent shades.
Basics - Telegram & messengers4 min
How to Create a Telegram Bot with BotFather: Step-by-Step Guide
Open @BotFather, send /newbot, choose a name and a username ending in bot, and you get a token; then set the description, avatar, commands and menu button, and keep the token only in server environment variables.
Basics - E-commerce & CRM3 min
Cash on Delivery vs Online Payment: Pros, Cons and Risks
Cash on delivery wins the trust of first-time buyers but brings refusals, wasted courier trips and cash risks; online payment is safer for the store, so nudge buyers toward it with incentives rather than bans.
Practice - Security4 min
Customer Data Leak: How to Respond and Notify Users and Regulators
Stop the leak first, preserve evidence, find out exactly what data and whose was exposed, notify the regulator and affected people within legal deadlines (72 hours to the authority under GDPR), then fix the root cause.
Practice - Databases & data5 min
Database Normalization: 1NF, 2NF, 3NF with Examples
Normalization means splitting data into tables so that every fact is stored once: 1NF removes lists inside cells, 2NF removes columns that depend on only part of a composite key, 3NF removes columns that depend on other non-key columns; denormalize only deliberately, for measured read performance or reporting.
Basics - Hosting & cloud3 min
Cloud Vendor Lock-In: Risks and How to Stay Portable
Lock-in comes from proprietary services, egress fees and closed data formats; you do not need to avoid it entirely, but you should choose deliberately where you get locked in and keep a working exit path.
Advanced - IT careers3 min
How to Write a Developer Resume That Gets Interviews
A good developer resume is one or two pages in a simple format, describes experience through results and technologies, and is tailored to the specific vacancy.
Practice - Tools & no-code4 min
IF, IFS, AND and OR in Excel: Writing Conditional Formulas
IF checks one condition and returns one of two values, AND and OR combine several checks, IFS replaces nested IFs, and when there are many thresholds a lookup table with VLOOKUP is easier to maintain.
Basics - IT by industry4 min
Buy Now Pay Later: How Installment Services Work for Merchants
With BNPL the customer pays in parts, while the merchant usually gets the full amount upfront minus a fee from the provider, who takes on the credit risk; integration is a checkout payment method plus status webhooks and refunds.
Basics - Networks & office IT4 min
Fiber vs ADSL vs 4G/5G Internet for Business: How to Choose
If fiber is available at your office address, make it your main line and use 4G/5G as a backup; keep ADSL only for places with no other option.
Basics - IT for business3 min
How to Build a Digital Transformation Plan for an SME
Assess how the company works today, set 2-3 measurable business goals, choose initiatives with the best value-to-effort ratio, budget in stages and plan in advance how people will move to the new processes.
Practice - Web development4 min
Cookies vs localStorage vs sessionStorage: Where to Store Data
Cookies travel to the server with every request and suit sessions with HttpOnly and Secure flags; localStorage keeps non-secret settings long-term, sessionStorage until the tab closes.
Practice - SEO3 min
Domain Authority, DR and Yandex SQI: What These Metrics Mean
DR and DA are third-party estimates of a link profile that search engines do not use for ranking, while Yandex SQI reflects site usefulness; all three are for rough comparison, not for predicting rankings.
Basics - DevOps3 min
How to Deploy an Application to Kubernetes Step by Step
Push the image to a registry, describe a Deployment, a Service and config in YAML, apply them with kubectl apply, check rollout status and update the app by changing the image tag.
Practice - AI & automation4 min
AI Image Generation for Business: Tools, Rights and Workflow
AI image generators work well for illustrations, concepts and backgrounds, but check each tool's terms before commercial use and rely on real photos for products, people and testimonials.
Practice - Programming4 min
Composition vs Inheritance: When to Use Which
Prefer composition by default: build objects from small, replaceable parts. Use inheritance only for a true, stable "is-a" relationship with a shallow hierarchy.
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