Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- IT for business4 min
Private Clinic Automation: Booking, Records and Reminders
A clinic needs one system where online booking, doctor schedules, electronic records, reminders and payments are connected, while medical data is protected and stored as the law requires.
Practice - Web development4 min
Forms in React with React Hook Form and Zod Validation
React Hook Form manages fields and submission without extra re-renders, while a Zod schema defines validation rules once, and the same schema can validate data on the server.
Practice - SEO3 min
Noindex vs Robots.txt Disallow: Which One to Use
Disallow in robots.txt stops crawlers from fetching a page, while noindex stops it from appearing in search; to remove a page from results, use noindex and keep the URL crawlable.
Basics - DevOps4 min
Monitoring vs Observability: Metrics, Logs and Traces Explained
Monitoring tells you something is broken based on checks you defined in advance; observability lets you find out why using three data sources: metrics (how much), logs (what happened) and traces (where exactly).
Basics - AI & automation3 min
LLM API Pricing: How to Estimate and Reduce Your AI Costs
LLM API cost = requests × (input tokens × input price + output tokens × output price); you reduce it with model routing, caching, shorter prompts and batching.
Practice - Programming3 min
Python Decorators: How They Work and How to Write Your Own
A decorator is a function that takes a function and returns a new one with extra behavior before or after the call; the @decorator syntax is just shorthand for func = decorator(func).
Practice - Mobile development4 min
Calling Native Code from Flutter and React Native
Flutter talks to native code through platform channels (ideally generated with Pigeon), React Native through native modules (TurboModules or the Expo Modules API). You need native code for SDKs, sensors and background work; keep it thin, typed and isolated in its own package.
Advanced - Marketing & analytics4 min
How to Set Up Retargeting in Google Ads and Meta Ads
Retargeting works when you split visitors by intent (cart, pricing page, visit depth), give each segment its own window and creative, exclude buyers and cap how often people see your ads.
Practice - Design & UX4 min
Typography Basics for Web and Interface Design
Good screen typography rests on a few decisions: a body size of about 16px or larger, line height around 1.4–1.6, lines of roughly 45–75 characters, a limited type scale and two or three weights. Get these right and most interfaces become readable before any styling.
Basics - Telegram & messengers4 min
Telegram vs WhatsApp for Business: Which Messenger to Choose
The main criterion is where your customers already chat; with equal reach, Telegram gives more freedom and cheaper automation, while WhatsApp wins where it is the default messenger but has stricter, paid rules for broadcasts and bots.
Basics - E-commerce & CRM4 min
Preparing an Online Store for Peak Sales: Load, Stock and Payments
Prepare for a peak sale early: find the real limit with load tests, offload the catalog to caches, protect checkout and stock from race conditions, agree on limits with payment providers and run a war room with a rollback plan.
Advanced - Security4 min
Symmetric vs Asymmetric Encryption Explained Simply
Symmetric encryption uses one key to both lock and unlock data — fast, but the key must be shared safely. Asymmetric encryption uses a key pair: a public key to encrypt or verify signatures and a private key to decrypt or sign. In practice they are combined: asymmetric crypto agrees on a key, symmetric crypto encrypts the data.
Basics - Databases & data4 min
Star Schema vs Snowflake Schema: Data Modeling for Analytics
Both schemas put measurable events in a central fact table surrounded by dimensions; a star keeps each dimension in one wide table for simple, fast queries, while a snowflake splits dimensions into normalized sub-tables, and most BI tools work best with a star.
Basics - Hosting & cloud4 min
What Is a CDN and How It Speeds Up Your Website
A CDN is a network of servers around the world that keep copies of your site's files and serve them from the point closest to each visitor, so pages load faster and your main server does less work; the gain is largest for static files and audiences far from the server.
Basics - IT careers4 min
How to Get a Remote Job at a Foreign Company from Uzbekistan
Look for roles that explicitly accept candidates from your region, prepare your CV and interviews in English, understand the hiring model (contractor or EOR) early and set up a legal status for receiving payments and paying taxes.
Practice - Tools & no-code4 min
Slack for Teams: Channels, Threads and Good Practices
Slack works when conversations live in topic channels, replies go into threads, notifications are tuned per channel, and the team agrees on a few naming and etiquette rules from day one.
Basics - IT by industry4 min
Mobile Banking App: Features Users Expect and How to Plan Them
Users expect a mobile bank to open an account remotely, manage cards, send money and pay bills in a few taps, with biometric login and instant notifications; plan an MVP around these daily actions and add the rest in regular releases.
Practice - Networks & office IT4 min
What Is a UPS and How to Size One for Office Equipment
A UPS is a battery with electronics that keeps equipment running through outages and power fluctuations; size it by watts with headroom and by the runtime your router, NAS and server need.
Basics - IT for business4 min
Project Handover Checklist: Code, Accounts and Access
At handover the client must become the owner of every account — repository, domain, hosting, app stores and external services — and receive the code, keys and documentation needed to work without the previous contractor.
Practice - Web development3 min
React Hooks Guide: useState, useEffect, useRef and More
Hooks are functions that give a component state (useState), side effects (useEffect) and references (useRef); call them only at the top level and list dependencies honestly.
Practice - SEO3 min
On-Page vs Off-Page SEO: Key Differences Explained
On-page SEO is everything you change on your own site (content, headings, structure, speed); off-page SEO is the signals from outside (links, mentions, reviews). The first makes a page clear and useful, the second makes it trusted.
Basics - DevOps5 min
Nginx 502 Bad Gateway and 504 Timeout: Causes and Fixes
A 502 means Nginx got no valid response from the backend (it is down, not listening or the socket is inaccessible), while a 504 means the backend was too slow; error.log almost always names the cause.
Practice - AI & automation3 min
LLM Context Window Explained: Limits, Long Documents, Tricks
The context window is how much text, in tokens, a model sees in one request; anything that does not fit does not exist for it, so long documents are handled with summarization, chunking or RAG.
Basics - Programming4 min
Python Generators and yield: Processing Large Data Efficiently
A generator hands out values one at a time via yield instead of holding the whole collection in memory, so you can process a file of any size line by line with almost constant memory use.
Practice
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