Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- IT for business3 min
How to Validate a Startup Idea Before Writing Code
Test behavior, not opinions: talk to potential customers about their problem, then give them a chance to sign up or pay — all before a single line of code is written.
Practice - Web development4 min
HTTP Methods and Status Codes Every Developer Should Know
The method says what to do with a resource and the status code says how it ended; GET, PUT and DELETE are idempotent, POST is not, and client errors (4xx) must be clearly separated from server errors (5xx).
Basics - SEO4 min
How to Measure SEO Results: KPIs and Reporting That Matter
Judge SEO not by individual rankings but by non-brand clicks, visibility, indexed pages and leads from organic search, and put them into a short monthly report with conclusions and a plan.
Practice - DevOps3 min
Horizontal vs Vertical Scaling: How to Scale an Application
Vertical scaling means a bigger server; horizontal scaling means more servers behind a load balancer. Scaling up is the easier start, but long-term growth and fault tolerance require a stateless app ready to scale out.
Basics - AI & automation3 min
How to Fine-Tune an Open LLM With LoRA and QLoRA
LoRA trains small adapters on top of a frozen model, and QLoRA does the same on a 4-bit base, so fine-tuning fits on a single GPU. A clean dataset and an honest comparison with the base model decide success.
Advanced - Programming4 min
How Hash Tables Work: Hashing, Collisions and Lookups
A hash table turns a key into an array slot using a hash function, so lookup, insertion and deletion take constant time on average, while collisions are handled by chaining or open addressing.
Basics - Mobile development4 min
Migrating a Native App to Flutter or React Native: Strategies
A gradual migration is usually safer: new screens are built in Flutter or React Native inside the native app, one layer owns auth and data, and releases continue as usual; a full rewrite makes sense for small or badly outdated apps.
Advanced - Marketing & analytics4 min
Google Ads vs Meta Ads: Which Is Better for Your Business
Google Ads reaches people who are already searching for your product, while Meta Ads shows ads to people who match by interests but are not searching yet. One captures existing demand, the other creates new demand, and many businesses need both.
Basics - Design & UX4 min
How to Write a Design Brief for a Website or Logo
A good design brief answers six questions: why you need the design, who it is for, who you compete with, what you like and why, what exactly will be delivered, and what limits apply to time, budget and tech.
Practice - Telegram & messengers4 min
How to Build a Sales Funnel in a Telegram Bot
Split the customer path into stages from /start to repeat purchase, tag the source with a deep link, segment with button questions, bring back drop-offs with short reminders, and log every stage as an event to measure conversion.
Practice - E-commerce & CRM4 min
How to Start Selling on Ozon: Step-by-Step Guide
Sign up in the Ozon seller portal, upload your catalog manually, via a template or the API, choose a fulfillment scheme (FBO, FBS or realFBS), set prices with a minimum price for promotions and automate stock, prices and orders through the Seller API.
Practice - Security3 min
Preventing XSS in React and Next.js Applications
React escapes text in JSX, so XSS in React apps happens around that protection: dangerouslySetInnerHTML, unsafe URLs, Markdown with raw HTML and direct DOM access. Sanitize HTML with DOMPurify, validate link schemes and enable a CSP.
Practice - Databases & data4 min
PostgreSQL Users, Roles and Permissions Done Right
A sound PostgreSQL permission model uses group roles without login (owner, application, analytics) and separate login roles that are members of them; privileges come from GRANT and ALTER DEFAULT PRIVILEGES, BI gets read-only access, and Row-Level Security isolates rows.
Practice - Hosting & cloud4 min
How to Transfer a Domain to Another Registrar Safely
First make sure your DNS does not depend on the old registrar, then unlock the domain, get the auth code and start the transfer well before expiry, not a few days before.
Practice - IT careers4 min
How to Write a Freelance Proposal That Wins IT Projects
The winning proposal is short, shows from the first line that you understand the client's problem, backs it with one similar example, and includes a concrete plan, clarifying questions and a clear price.
Practice - Tools & no-code4 min
Make (Integromat) Scenarios: Routers, Iterators and Filters
A Make scenario is a chain of modules that data bundles flow through: routers split the flow into branches, filters decide which bundles pass, iterators break an array into separate bundles and aggregators combine them back.
Practice - IT by industry4 min
Gym Access Control: Turnstiles, Cards and App Integration
A turnstile should admit a member based on the CRM's answer about membership status, not just because a card exists; the credential (card, QR or face) is chosen by balancing convenience, cost and protection against sharing.
Practice - Networks & office IT4 min
IT Setup for a Retail Store: POS, Internet, Wi-Fi and Cameras
Split the store network into segments for POS, card terminals, cameras and guests, give the tills a backup internet link, put critical equipment on a UPS and run a launch checklist with a test sale before opening.
Practice - IT for business4 min
How to Write an RFP for Software Development
A good RFP describes the problem, users, features, constraints and the expected response format, and proposals are scored against weighted criteria set in advance — not on price alone.
Practice - Web development3 min
Image Optimization for the Web: WebP, AVIF, srcset, Lazy Loading
Serve WebP or AVIF, size images to the screen with srcset and sizes, lazy-load only below the fold, always set width and height, and automate it with your build or an image CDN.
Practice - SEO3 min
How to Set Up hreflang Tags and Avoid Common Mistakes
hreflang tells search engines which pages are translations of each other. Every version must link to all the others and to itself, with valid codes and absolute URLs, or the markup is ignored.
Practice - DevOps3 min
Incident Response and Blameless Postmortems: A Practical Guide
During an incident, appoint a commander and restore service first; afterwards, run a blameless review, find systemic causes and drive every action item to completion.
Advanced - AI & automation4 min
Using Foreign AI APIs Under Uzbekistan Data Localization Rules
Keep the master copy of personal data on servers in Uzbekistan and send foreign AI APIs only de-identified text; when that is not possible, run a self-hosted model locally.
Practice - Programming3 min
How to Choose a Programming Language for Your Project
Pick a language by five criteria, not by trends: project type, performance needs, ecosystem maturity, availability of developers and the cost of maintaining it for years.
Basics
Have an idea or a task? Tell us about it
We'll reply within one business day and propose a solution. The consultation is free.