Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- Mobile development4 min
How to Localize a Mobile App into Multiple Languages
Move every text into platform string resources from day one, rely on system plural and date and number formatting rules, decide early how to support Uzbek in Latin and Cyrillic, and localize your store listing as well as the interface.
Practice - Marketing & analytics4 min
Marketing Attribution Models Explained: Last Click to Data-Driven
An attribution model is the rule that splits the value of a sale between marketing touchpoints. The model you choose decides which channels look profitable, and therefore where your budget goes.
Basics - Design & UX4 min
Modals, Toasts and Tooltips: When to Use Each in UI
Pick the pattern by how much it interrupts: a modal when the user must decide before continuing, a toast for a brief confirmation that does not stop work, a tooltip for optional clarification on hover or focus.
Practice - Telegram & messengers3 min
Telegram Channel vs Group: Which One Your Business Needs
A channel broadcasts from your business to an audience, a group lets members talk to each other; most companies are best served by a channel with a linked discussion group, while a standalone group fits when the value is in customers talking.
Basics - E-commerce & CRM4 min
How to Build a Multi-Vendor Marketplace Platform
A marketplace is an online store plus a separate seller layer: onboarding and verification, product moderation, order splitting by seller, commissions, payouts, ratings and disputes; start with a ready platform or an MVP, and go custom only when your model is truly unique.
Advanced - Security4 min
How to Secure an Admin Panel: A Practical Checklist
Protect an admin panel in layers: isolate it on its own domain, require 2FA for everyone, limit network access by IP or VPN, give each person only the rights they need, log every action and expire idle sessions.
Practice - Databases & data4 min
Database Sharding vs Partitioning: Scaling Large Tables
Partitioning divides one large table into smaller pieces inside a single database server, while sharding spreads data across several servers by a shard key; start with partitioning and shard only when one server truly cannot cope.
Advanced - Hosting & cloud4 min
How to Reduce Cloud Costs: Practical Optimization Tips
First make spending visible with tags, then remove idle resources, size instances to real load, move steady load to reserved capacity and interruptible work to spot, and set lifecycle rules for storage.
Practice - IT careers4 min
Learning to Code with AI: How to Use ChatGPT Without Losing Skills
Use AI to explain, hint and review, but write the code yourself first and regularly practice without it; if you cannot explain or rebuild a solution without the assistant, you have not learned it yet.
Practice - Tools & no-code4 min
Notion Formulas and Rollups: Advanced Guide with Examples
A formula calculates a value inside one record, a rollup collects and aggregates data from related records; together they give you automatic deadlines, project progress and remaining budget in Notion without manual math.
Advanced - IT by industry4 min
Automating Insurance Claims: From Photo Upload to Payout
Claims automation means a digital report with photos and documents, triage rules that send simple cases to fast payout, AI damage assessment and fraud flags for disputed ones, and clear statuses for the customer at every step.
Practice - Networks & office IT4 min
How to Configure VLANs on a Switch and Router Step by Step
Plan VLAN IDs and subnets, make device ports access and links to the router and access points trunks, route VLANs on the router, block traffic between them by default, give each VLAN its own DHCP and test isolation.
Advanced - IT for business3 min
How to Measure a Development Team's Productivity
Measure a team by how quickly and reliably value reaches users: lead time, deployment frequency, change failure rate, time to restore and business outcomes. Lines of code and hours worked show activity, not results.
Advanced - Web development4 min
How to Add Authentication to Next.js: Auth.js, Clerk or Custom
Clerk is the fastest start but keeps user data with a third party and costs more as you grow; Auth.js is free and stores users in your database; custom auth gives full control. In any case, check the session inside every server component and server action, not only in middleware.
Practice - SEO3 min
Link Building Strategies That Work Without Penalties
Safe links are the ones that would exist without SEO — media coverage, genuinely useful guest posts, partner pages and quality directories — built with natural anchors and at a steady pace.
Practice - DevOps4 min
Kubernetes Liveness, Readiness and Startup Probes Explained
Liveness restarts a stuck container, readiness removes a pod from traffic while it cannot serve, and startup gives slow apps time to boot before the other two begin — keep liveness checks shallow and never make them depend on the database.
Practice - AI & automation3 min
How to Test LLM Applications: Evals, Datasets, LLM-as-Judge
Test an LLM application on a golden set of real examples with clear criteria, combining code checks, an LLM judge and sampled human review, and rerun that set every time the prompt or model changes.
Advanced - Programming4 min
Linked List vs Array: Differences and When to Use Each
An array stores elements side by side, so index access is O(1) and iteration is cache-friendly; a linked list stores scattered nodes joined by pointers, so it only wins when you insert or remove at a node you already hold.
Basics - Mobile development4 min
Mobile App Login: SMS OTP, Sign in with Apple and Google
For apps in Central Asia and the CIS, a sound default is phone number with SMS OTP plus Google and Apple sign-in, with tokens in Keychain/Keystore and sessions renewed by a refresh token.
Practice - Marketing & analytics4 min
CAC, LTV, ROMI and ROAS: Key Marketing Metrics Explained
CAC is what it costs to win a customer, LTV is the profit they bring over their lifetime, ROAS is revenue per dollar of ads and ROMI is profit per dollar of marketing. Ads pay off when LTV clearly exceeds CAC and ROMI is positive after margin.
Basics - Design & UX3 min
Motion Design in UI: Principles, Timing and Easing
UI motion should explain what happened, not decorate: short durations, ease-out for entering, ease-in for exiting and one focal point at a time. Always respect the reduced-motion setting and hand animations to developers as tokens with exact parameters.
Advanced - Telegram & messengers4 min
Telegram Deep Links: Using the start Parameter for Tracking
Add ?start=CODE to a bot link (or ?startapp=CODE for a Mini App), and the bot receives that code when the user starts it, so you can tell which ad, blogger or friend brought each user.
Practice - E-commerce & CRM4 min
One-Page vs Multi-Step Checkout: Which Works Better
There is no universal winner: a one-page checkout suits simple orders with a short form, a multi-step checkout suits long forms and complex delivery choices, and the final call should come from your own store data and an A/B test.
Practice - Security4 min
Secure Cookie Settings: HttpOnly, Secure and SameSite
A session cookie should be HttpOnly, Secure, SameSite=Lax (or Strict), use the __Host- prefix and have a server-enforced lifetime. Together these flags block theft via XSS, leaks over HTTP and most CSRF.
Practice
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